WO2018205161A1 - Chirped phase-shifted fibre bragg grating, and manufacturing method and device therefor - Google Patents

Chirped phase-shifted fibre bragg grating, and manufacturing method and device therefor Download PDF

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Publication number
WO2018205161A1
WO2018205161A1 PCT/CN2017/083713 CN2017083713W WO2018205161A1 WO 2018205161 A1 WO2018205161 A1 WO 2018205161A1 CN 2017083713 W CN2017083713 W CN 2017083713W WO 2018205161 A1 WO2018205161 A1 WO 2018205161A1
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Prior art keywords
grating
fiber
processed
period value
phase shift
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PCT/CN2017/083713
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French (fr)
Chinese (zh)
Inventor
廖常锐
王义平
朱峰
王英
何俊
李正勇
杨天航
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深圳大学
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Priority to PCT/CN2017/083713 priority Critical patent/WO2018205161A1/en
Publication of WO2018205161A1 publication Critical patent/WO2018205161A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating

Definitions

  • the invention belongs to the technical field of grating fabrication, and in particular relates to a fiber Bragg ⁇ phase shift grating and a manufacturing method and device thereof.
  • Fiber phase-shift gratings are widely used in many fields.
  • the industry mainly uses phase mask-based grating writing technology to prepare fiber phase-shift gratings.
  • the phase mask version is expensive and difficult to maintain and maintain, and the manufacturing cost is very high, and since the phase mask is written with a low amount of modulation of the fiber grating, it is relatively inefficient to prepare a grating capable of withstanding extreme environments.
  • the invention provides a fiber Bragg ⁇ phase shift grating and a manufacturing method and device thereof, aiming at solving the problems of high production cost and low preparation efficiency of the existing ⁇ fiber phase shift grating.
  • a denotes the initial period value of the grating calculated based on the preset ⁇ range of the grating
  • a' denotes the end period value of the grating calculated based on the preset ⁇ range of the grating
  • k denotes a grating-based pre- Set the raster ⁇ rate calculated by the performance
  • b denotes the hop transition start period value of the grating calculated based on the preset phase shift position of the grating and the preset phase shift range
  • b' denotes the grating-based preset
  • the invention also provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
  • the intelligent terminal generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a jump start period value of the grating, and a transition termination period value of the grating;
  • the laser scanning device scans the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain the fiber Bragg phase shift grating.
  • the laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
  • the laser scanning device performs a scan at an initial position of the fiber to be processed
  • the laser scanning performs a scan, the N being the total number of grid periods in the set;
  • the smart terminal further generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a transition start period value of the grating, and a transition termination period value of the grating.
  • the intelligent terminal calculates the initial period value of the grating and the end period value of the grating by using the preset range of the grating;
  • the intelligent terminal calculates the grating defect rate by using the preset performance of the grating
  • the intelligent terminal calculates the jump start period value of the grating and the jump termination period value of the grating by using the preset phase shift position of the grating and the preset phase shift range.
  • the invention also provides a fiber Bragg ⁇ phase shift grating fabrication device, the device comprising:
  • the intelligent terminal is configured to generate a grid period rule according to a starting period value of the grating, a termination period value of the grating, a grating defect rate, a hopping start period value of the grating, and a hopping termination period value of the grating;
  • the laser scanning device is configured to scan the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
  • the laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
  • the laser scanning device performs a scan at an initial position of the fiber to be processed
  • the laser scanning performs a scan, the N being the total number of grid periods in the set;
  • the smart terminal is further configured to:
  • the grating defect rate is calculated by using the preset ⁇ performance of the grating
  • the hop transition start period value of the grating and the hop transition termination period value of the grating are calculated by using the preset phase shift position of the grating and the preset phase shift range.
  • the device further includes:
  • a three-dimensional mobile platform for horizontally placing the fiber to be processed, and driving the fiber to be processed to move horizontally by one grid period along the radial direction of the fiber to be processed;
  • a fiber fixing device for fixing the fiber to be processed on the three-dimensional mobile platform
  • An adjustable energy attenuation control device one end of which is coupled to the laser scanning device for attenuating energy of the laser light emitted by the laser scanning device;
  • a shutter aperture one end of which is connected to the other end of the adjustable energy attenuation control device, and is used as a switch to control whether the attenuated laser scans the fiber to be processed;
  • a microscope connected to the smart terminal via a charge coupled component for acquiring a structure imaging of the grating in real time during the fabrication of the fiber Bragg phase shift grating, and transmitting the image to the smart terminal for display;
  • a light source connected to one end of the fiber to be processed for emitting light during the fabrication of the fiber Bragg phase shift grating to generate a spectral signal by the fiber Bragg phase shift grating;
  • a spectrometer is coupled to the other end of the fiber to be processed for monitoring the spectral signal in real time during fabrication of the fiber Bragg phase shift grating.
  • the tunable energy attenuation control device is composed of a 1/2 wave plate and a Glan prism;
  • the microscope is a high power oil immersion objective.
  • the distance between the laser spot emitted by the laser scanning device and the upper edge of the core of the fiber to be processed is in the range of 0-20 ⁇ m.
  • the invention has the following advantages:
  • the preparation method of the grating is simple, and the laser scanning device only needs to scan the fiber to be processed line by line according to the grid period rule calculated by the intelligent terminal along the radial direction of the fiber to be processed, thereby obtaining the fiber Bragg phase shift grating.
  • the invention also provides a device for fabricating a fiber Bragg ⁇ phase shift grating, which generates a grid period rule by an intelligent terminal, and the laser scanning device performs line-by-line scanning on the processed fiber according to the grid period rule, and the manufacturing device has a simple structure. And the grating is manufactured with high efficiency.
  • FIG. 1 is a schematic structural view of a fiber Bragg phase shift grating provided by an embodiment of the present invention
  • FIG. 2 is a flow chart of a method for fabricating a fiber Bragg phase shift grating according to an embodiment of the present invention
  • FIG. 3 is a flow chart of a method for fabricating a fiber Bragg phase shift grating according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a fiber Bragg ⁇ phase shift grating manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a fiber Bragg ⁇ phase shift grating manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a fiber Bragg phase shift grating fabrication apparatus according to an embodiment of the present invention.
  • a denotes the initial period value of the grating calculated based on the preset ⁇ range of the grating
  • a' denotes the end period value of the grating calculated based on the preset ⁇ range of the grating
  • k denotes a grating-based pre- Set the raster ⁇ rate calculated by the performance
  • b denotes the hop transition start period value of the grating calculated based on the preset phase shift position of the grating and the preset phase shift range
  • b' denotes the grating-based preset
  • the first grid period of the fiber Bragg phase shift grating is a
  • the second grid period is a+k
  • the third grid period is a+2k, which is sequentially incremented until
  • the grid period is bk (ie a+nk)
  • the next grid period is b'+k
  • the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends.
  • 1001 denotes a fiber cladding of the fiber Bragg phase shift grating
  • 1002 denotes an optical fiber core of the fiber Bragg phase shift grating
  • h denotes a length of the grating stripe of the fiber Bragg phase shift modulation
  • L1 represents the first stripe stripe
  • L2 represents the second stripe stripe
  • the spacing between L1 and L2 is the first grid period a.
  • the fiber Bragg phase shift grating provided by the first embodiment of the present invention is an all-fiber structure, which has a simple structure, better flexibility, and due to its all-fiber structure. Therefore, it has the characteristics of anti-electromagnetic interference, so that the influence of electromagnetic interference on the detection result can be avoided in the process of detecting the fiber Bragg phase shift grating.
  • the present invention provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
  • Step S101 The smart terminal generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a jump start period value of the raster, and a transition termination period value of the raster.
  • Step S102 The laser scanning device scans the fiber to be processed line by line according to the rule of the grid period along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
  • the intelligent terminal automatically generates a grid period rule according to parameters such as a start period value of the grating, and the laser scanning device follows the grid.
  • the fiber-by-line scanning is performed on the fiber to be processed according to the line-by-line method, thereby obtaining a fiber Bragg phase shift grating, which is simple in production method and high in production efficiency.
  • the present invention provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
  • Step S201 The smart terminal calculates the initial period value a of the grating and the end period value a' of the grating by using the preset range of the grating.
  • Step S202 The smart terminal calculates the raster defect rate k by using the preset performance of the raster.
  • Step S203 The smart terminal calculates the hop transition start period value b of the raster and the hop transition termination period value b' of the raster by using the preset phase shift position of the raster and the preset phase shift range.
  • the invention installs a software application program on the smart terminal, and inputs a preset range, a preset performance, a preset phase shift position and a preset phase shift range in the software application, and the software application can automatically calculate Get the corresponding parameter results.
  • the preset ⁇ range, preset ⁇ performance, preset phase shift position and preset phase shift range can be set according to the needs of actual production, so as to finally obtain the desired fiber Bragg phase. Shift grating.
  • Step S204 The smart terminal generates a grid period rule according to the start period value of the grating, the end period value of the grating, the raster chirp rate, the jump start period value of the raster, and the transition termination period value of the raster.
  • the grid period rules are as follows:
  • Step S205 The laser scanning device scans the fiber to be processed line by line according to the rule of the grid period along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
  • step S205 specifically includes:
  • the laser scanning device performs a scan at the initial position of the fiber to be processed (i.e., the position of the first grating stripe L1).
  • the laser scanning device performs A scan in which N is the total number of raster periods in the set of raster periods; if i is equal to N, then the end of the scan is determined.
  • the first grid period of the fiber Bragg phase shift grating is a
  • the second grid period is a+k
  • the third grid period is a+2k, which is incremented until When the grid period is bk (ie a+nk), the next grid period is b'+k, and the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends.
  • the speed v of the three-dimensional moving platform driving the optical fiber to be processed along the radial direction of the fiber to be processed is set to be 0.01 mm/s to 0.2 mm.
  • the laser energy of the refractive index intensity modulation is set to ⁇ n (10 -4 -10 -2) , and the scanning is performed by continuous control based on the line-by-line method.
  • the prepared fiber Bragg phase shift grating has a continuous smooth morphology along the linear modified region of the fiber radial direction.
  • the distance between the laser spot emitted by the laser scanning device and the upper edge of the core of the fiber to be processed is set in the range of 0-20 ⁇ m, which can be better in this parameter range.
  • the device performance is effective for the modulation area of the fiber and can meet the requirements of efficient processing.
  • the method for fabricating a fiber Bragg phase shift grating provided by the third embodiment of the present invention is basically controlled by an intelligent terminal, and the manufacturing method is simple, the preparation efficiency is high, and the prepared optical fiber is prepared.
  • the Bragg phase shift grating has a high degree of flexibility.
  • the present invention provides a fiber Bragg phase shift grating fabrication apparatus, the apparatus comprising:
  • the smart terminal 102 is configured to generate a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a hopping start period value of the grating, and a hopping termination period value of the grating.
  • the laser scanning device 103 is configured to scan the optical fiber 101 to be processed line by line according to the above-mentioned grid period rule in the radial direction of the optical fiber 101 to be processed to obtain a fiber Bragg phase shift grating.
  • the smart terminal 102 automatically generates a grid period rule according to parameters such as a start period value of the grating, and the laser scanning device 103 follows the The grid period rule is to perform line-by-line scanning on the processed optical fiber 101 based on the line-by-line method, thereby obtaining a fiber Bragg phase shift grating, which is simple in fabrication method and high in production efficiency.
  • the present invention provides a fiber Bragg phase shift grating fabrication apparatus, the apparatus comprising:
  • the smart terminal 202 is configured to calculate the initial period value of the grating and the end period value of the grating by using the preset range of the grating; calculate the grating defect rate by using the preset ⁇ performance of the grating; The phase shift position and the preset phase shift range are calculated to calculate the jump start period value of the grating and the jump termination period value of the grating.
  • the shift position and the preset phase shift range calculate the jump start period value of the grating and the jump end period value of the grating.
  • the smart terminal 202 is a device such as a computer, and the smart terminal 202 is installed with a software application, in which a preset range, a preset performance, a preset phase shift position, and a preset are input.
  • the software application can automatically calculate the corresponding parameter results.
  • the preset ⁇ range, preset ⁇ performance, preset phase shift position and preset phase shift range can be set according to the needs of actual production, so as to finally obtain the desired fiber Bragg phase. Shift grating.
  • the smart terminal 202 is further configured to generate a grid period rule according to a start period value of the grating, a termination period value of the grating, a grating defect rate, a transition start period value of the grating, and a transition termination period value of the grating.
  • the grid period rules are as follows:
  • the laser scanning device 203 is configured to scan the optical fiber 201 to be processed line by line according to the above-mentioned grid period rule in the radial direction of the fiber 201 to be processed to obtain a fiber Bragg phase shift grating.
  • the laser scanning device 203 is a femtosecond laser. According to the above grid period rule, the laser scanning device 203 is specifically used to:
  • the laser scanning device 203 performs a scan at the initial position of the optical fiber 201 to be processed (i.e., the position of the first grating stripe L1).
  • the laser scanning device 203 performs another scanning (ie, the second grating stripe L2).
  • the position where the spot of the laser scanning device 203 passes will form a grating stripe.
  • the device performs another scan, where N is the total number of grid periods in the set of grid periods; if i is equal to N, then the end of the scan is determined.
  • the first grid period of the fiber Bragg phase shift grating is a
  • the second grid period is a+k
  • the third grid period is a+2k, which is incremented until When the grid period is bk (ie a+nk), the next grid period is b'+k, and the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends.
  • the three-dimensional mobile platform 204 is mainly used for horizontally placing the optical fiber 201 to be processed, and is connected to the intelligent terminal 202. According to the control of the grid cycle rule generated by the intelligent terminal 202, the optical fiber 201 to be processed is driven along the radial direction of the optical fiber 201 to be processed. Moves the distance of one grid period horizontally.
  • the optical fiber fixing device 208 is configured to fix the optical fiber 201 to be processed on the three-dimensional mobile platform 204.
  • the adjustable energy attenuation control device 205 has one end connected to the laser scanning device 203 for attenuating the energy of the laser light emitted by the laser scanning device 203.
  • the adjustable energy attenuation control device 205 is composed of a first 1/2 wave plate 2051, a gradation prism 2052, and a second 1/2 wave plate 2053.
  • the shutter stop 206 has one end connected to the other end of the adjustable energy attenuation control device 205 for use as a switch to control whether the attenuated laser is to be scanned by the processing fiber 201, and the shutter stop 206 is also connected to the smart terminal 202.
  • the operation of whether to open the switch is mainly performed according to the control of the smart terminal 202.
  • the microscope 207 is connected to the smart terminal 202 through a charge coupling element for acquiring the structure imaging of the grating in real time during the fabrication of the fiber Bragg phase shift grating, and transmitting the image to the smart terminal 202 for display.
  • the structure imaging of the grating, the imaging of the stripe shape, and the like are observed through the microscope 207, so that the level of the current grating can be judged based on the imaging captured by the microscope, so that the laser energy can be adjusted at any time during the preparation process.
  • the microscope 207 is a high power oil immersion objective.
  • the light source 209 is connected to one end of the optical fiber 201 to be processed for emitting light during the fabrication of the fiber Bragg phase shift grating to generate a spectral signal by the fiber Bragg phase shift grating.
  • the spectrometer 210 is connected to the other end of the optical fiber 201 to be processed for monitoring the spectral signal in real time during the fabrication of the fiber Bragg phase shift grating, so as to determine the level of the gate in real time according to the spectral signal.
  • the distance between the laser spot emitted by the laser scanning device 203 and the upper edge of the core of the fiber to be processed 201 is in the range of 0-20 ⁇ m, and the device performance can be achieved within this parameter range.
  • the modulation area is more efficient and can meet the requirements of efficient processing.
  • the speed v of the three-dimensional moving platform 204 driving the optical fiber 201 to be processed along the radial direction of the fiber to be processed 201 is set at 0.01 mm/s to 0.2 mm/ In the range of s, and in order to make the prepared grating more uniform, the laser energy of the refractive index intensity modulation is set to ⁇ n (10 -4 -10 -2 ), and the scanning is performed by continuous control based on the line-by-line method.
  • the prepared fiber Bragg phase shift grating has a continuous smooth shape along the linear modified region in the radial direction of the fiber.
  • the fiber Bragg ⁇ phase shift grating manufacturing device provided by the fifth embodiment of the present invention is basically controlled by an intelligent terminal, and the device has the advantages of simple structure, low manufacturing cost, high preparation efficiency, and The prepared fiber Bragg phase shift grating has high flexibility.

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

Disclosed are a chirped phase-shifted fibre Bragg grating, and a manufacturing method and device therefor, wherein same aim to solve the problems of high manufacturing costs and low manufacturing efficiency of existing chirped phase-shifted fibre gratings. The grating comprises a plurality of grid periods, wherein a set of the plurality of grid periods is D, and D = (a, a + k, a + 2k, a + nk, b' + k, b' + 2k, ..., b' + mk), wherein a + nk = b - k, b' + mk = a', a represents a starting period value of the grating, a' represents an end period value of the grating, k represents a chirp rate of the grating, b represents a hopping starting period value of the grating, b' represents a hopping end period value of the grating, n represents a positive integer, and m represents a positive integer. A laser scanning apparatus can obtain a chirped phase-shifted fibre Bragg grating only by scanning fibres to be processed line-by-line in the radial direction of the fibres to be processed according to a grid period rule generated by an intelligent terminal by means of calculation.

Description

一种光纤布拉格啁啾相移光栅及其制作方法和设备 Fiber Bragg 啁啾 phase shift grating and manufacturing method and device thereof 技术领域Technical field
本发明属于光栅制作技术领域，尤其涉及一种光纤布拉格啁啾相移光栅及其制作方法和设备。 The invention belongs to the technical field of grating fabrication, and in particular relates to a fiber Bragg 啁啾 phase shift grating and a manufacturing method and device thereof.
背景技术Background technique
啁啾光纤相移光栅在众多领域具有广泛应用，目前，行业内主要是采用基于相位掩膜版的光栅刻写技术来制备光纤相移光栅。但是，相位掩膜版造价昂贵并且保养维护困难，制作成本非常高，且由于相位掩膜版刻写光纤光栅调制量较低，要制备可耐极端环境的光栅效率比较低。 啁啾 Fiber phase-shift gratings are widely used in many fields. At present, the industry mainly uses phase mask-based grating writing technology to prepare fiber phase-shift gratings. However, the phase mask version is expensive and difficult to maintain and maintain, and the manufacturing cost is very high, and since the phase mask is written with a low amount of modulation of the fiber grating, it is relatively inefficient to prepare a grating capable of withstanding extreme environments.
技术问题technical problem
本发明提供了一种光纤布拉格啁啾相移光栅及其制作方法和设备，旨在解决现有的啁啾光纤相移光栅制作成本高及制备效率低的问题。 The invention provides a fiber Bragg 啁啾 phase shift grating and a manufacturing method and device thereof, aiming at solving the problems of high production cost and low preparation efficiency of the existing 啁啾 fiber phase shift grating.
技术解决方案Technical solution
为解决上述技术问题，本发明是这样实现的，本发明提供了一种光纤布拉格啁啾相移光栅，所述光栅包括若干个栅格周期，若干个所述栅格周期的集合为D，D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；In order to solve the above technical problem, the present invention is achieved by the present invention. The present invention provides a fiber Bragg phase shift grating, the grating comprising a plurality of grid periods, and the set of the plurality of grid periods is D, D =(a,a+k,a+2k,...,a+nk,b'+k,b'+2k,...,b'+mk);
其中，a+nk=b-k，b’+mk=a’；Where a+nk=b-k, b’+mk=a’;
其中，a表示基于光栅的预设啁啾范围计算得出的光栅的起始周期值，a’表示基于光栅的预设啁啾范围计算得出的光栅的终止周期值，k表示基于光栅的预设啁啾性能计算得出的光栅啁啾率，b表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变起始周期值，b’表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变终止周期值，n表示正整数，m表示正整数。Where a denotes the initial period value of the grating calculated based on the preset 啁啾 range of the grating, a' denotes the end period value of the grating calculated based on the preset 啁啾 range of the grating, and k denotes a grating-based pre- Set the raster 啁啾 rate calculated by the performance, b denotes the hop transition start period value of the grating calculated based on the preset phase shift position of the grating and the preset phase shift range, and b' denotes the grating-based preset The value of the transition termination period of the raster calculated from the phase shift position and the preset phase shift range, where n represents a positive integer and m represents a positive integer.
本发明还提供了一种光纤布拉格啁啾相移光栅制作方法，所述方法包括：The invention also provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则；The intelligent terminal generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a jump start period value of the grating, and a transition termination period value of the grating;
激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描，以得到所述光纤布拉格啁啾相移光栅。The laser scanning device scans the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain the fiber Bragg phase shift grating.
进一步地，所述栅格周期规则包含若干个栅格周期的集合，且所述集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示所述光栅的起始周期值，a’表示所述光栅的终止周期值，k表示所述光栅啁啾率，b表示所述光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数；Further, the grid period rule includes a set of a plurality of grid periods, and the set D=(a, a+k, a+2k, . . . , a+nk, b'+k, b'+2k ,...,b'+mk); where a+nk=bk, b'+mk=a'; where a denotes the initial period value of the grating, a' denotes the termination period value of the grating, k Representing the grating rate, b represents the hopping start period value of the grating, b' represents the hopping termination period value of the grating, n represents a positive integer, and m represents a positive integer;
则所述激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描具体包括：The laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
所述激光扫描装置在所述待加工光纤的初始位置进行一次扫描；The laser scanning device performs a scan at an initial position of the fiber to be processed;
三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述i的初始值为1，且D1=a；After the three-dimensional moving platform drives the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning device performs a scan, and the initial value of the i is 1, and D1=a;
若所述i不等于N，则令i=i+1，返回执行所述三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述N为所述集合中栅格周期的总数；If the i is not equal to N, let i=i+1, return to perform the three-dimensional mobile platform to drive the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning The device performs a scan, the N being the total number of grid periods in the set;
若所述i等于N，则确定扫描结束。If the i is equal to N, it is determined that the scan ends.
进一步地，所述智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则之前还包括：Further, the smart terminal further generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a transition start period value of the grating, and a transition termination period value of the grating. include:
智能终端利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值；The intelligent terminal calculates the initial period value of the grating and the end period value of the grating by using the preset range of the grating;
智能终端利用光栅的预设啁啾性能计算得出光栅啁啾率；The intelligent terminal calculates the grating defect rate by using the preset performance of the grating;
智能终端利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值。The intelligent terminal calculates the jump start period value of the grating and the jump termination period value of the grating by using the preset phase shift position of the grating and the preset phase shift range.
本发明还提供了一种光纤布拉格啁啾相移光栅制作设备，所述设备包括：The invention also provides a fiber Bragg 啁啾 phase shift grating fabrication device, the device comprising:
智能终端，用于根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则；The intelligent terminal is configured to generate a grid period rule according to a starting period value of the grating, a termination period value of the grating, a grating defect rate, a hopping start period value of the grating, and a hopping termination period value of the grating;
激光扫描装置，用于沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描，以得到光纤布拉格啁啾相移光栅。The laser scanning device is configured to scan the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
进一步地，所述栅格周期规则包含若干个栅格周期的集合，且所述集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示所述光栅的起始周期值，a’表示所述光栅的终止周期值，k表示所述光栅啁啾率，b表示所述光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数；Further, the grid period rule includes a set of a plurality of grid periods, and the set D=(a, a+k, a+2k, . . . , a+nk, b'+k, b'+2k ,...,b'+mk); where a+nk=bk, b'+mk=a'; where a denotes the initial period value of the grating, a' denotes the termination period value of the grating, k Representing the grating rate, b represents the hopping start period value of the grating, b' represents the hopping termination period value of the grating, n represents a positive integer, and m represents a positive integer;
则所述激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描具体包括：The laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
所述激光扫描装置在所述待加工光纤的初始位置进行一次扫描；The laser scanning device performs a scan at an initial position of the fiber to be processed;
三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述i的初始值为1，且D1=a；After the three-dimensional moving platform drives the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning device performs a scan, and the initial value of the i is 1, and D1=a;
若所述i不等于N，则令i=i+1，返回执行所述三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述N为所述集合中栅格周期的总数；If the i is not equal to N, let i=i+1, return to perform the three-dimensional mobile platform to drive the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning The device performs a scan, the N being the total number of grid periods in the set;
若所述i等于N，则确定扫描结束。If the i is equal to N, it is determined that the scan ends.
进一步地，所述智能终端还用于：Further, the smart terminal is further configured to:
利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值；Calculating the initial period value of the grating and the termination period value of the grating by using the preset range of the grating;
利用光栅的预设啁啾性能计算得出光栅啁啾率；The grating defect rate is calculated by using the preset 啁啾 performance of the grating;
利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值。The hop transition start period value of the grating and the hop transition termination period value of the grating are calculated by using the preset phase shift position of the grating and the preset phase shift range.
进一步地，所述设备还包括：Further, the device further includes:
三维移动平台，用于水平放置所述待加工光纤，及带动所述待加工光纤沿所述待加工光纤的径向每次水平移动一个栅格周期的距离；a three-dimensional mobile platform for horizontally placing the fiber to be processed, and driving the fiber to be processed to move horizontally by one grid period along the radial direction of the fiber to be processed;
光纤固定装置，用于将所述待加工光纤固定在所述三维移动平台上；a fiber fixing device for fixing the fiber to be processed on the three-dimensional mobile platform;
可调控能量衰减控制装置，其一端与所述激光扫描装置连接，用于衰减所述激光扫描装置发出的激光的能量；An adjustable energy attenuation control device, one end of which is coupled to the laser scanning device for attenuating energy of the laser light emitted by the laser scanning device;
快门光阑，其一端与所述可调控能量衰减控制装置的另一端连接，用于作为开关，以控制衰减后的激光是否对所述待加工光纤进行扫描；a shutter aperture, one end of which is connected to the other end of the adjustable energy attenuation control device, and is used as a switch to control whether the attenuated laser scans the fiber to be processed;
显微镜，与所述智能终端通过电荷耦合元件连接，用于在所述光纤布拉格啁啾相移光栅制作过程中，实时采集光栅的结构成像，并将所述成像发送至所述智能终端显示；a microscope connected to the smart terminal via a charge coupled component for acquiring a structure imaging of the grating in real time during the fabrication of the fiber Bragg phase shift grating, and transmitting the image to the smart terminal for display;
光源，与所述待加工光纤的一端连接，用于在所述光纤布拉格啁啾相移光栅制作过程中发光，以使所述光纤布拉格啁啾相移光栅生成光谱信号；a light source connected to one end of the fiber to be processed for emitting light during the fabrication of the fiber Bragg phase shift grating to generate a spectral signal by the fiber Bragg phase shift grating;
光谱仪，与所述待加工光纤的另一端连接，用于在所述光纤布拉格啁啾相移光栅制作过程中实时监测所述光谱信号。A spectrometer is coupled to the other end of the fiber to be processed for monitoring the spectral signal in real time during fabrication of the fiber Bragg phase shift grating.
进一步地，所述可调控能量衰减控制装置由1/2波片和格兰棱镜组成；Further, the tunable energy attenuation control device is composed of a 1/2 wave plate and a Glan prism;
所述显微镜为高倍的油浸物镜。The microscope is a high power oil immersion objective.
进一步地，所述激光扫描装置发出的激光光斑与所述待加工光纤的纤芯上边缘之间的距离在0—20μm的范围内。Further, the distance between the laser spot emitted by the laser scanning device and the upper edge of the core of the fiber to be processed is in the range of 0-20 μm.
有益效果Beneficial effect
本发明与现有技术相比，有益效果在于：Compared with the prior art, the invention has the following advantages:
本发明提供了一种光纤布拉格啁啾相移光栅，该光栅包括若干个栅格周期，若干个所述栅格周期的集合为D，D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’，a表示所述光栅的起始周期值，a’表示所述光栅的终止周期值，k表示所述光栅啁啾率，b表示所述光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数。该光栅的制备方法简单，激光扫描装置只需沿待加工光纤的径向，按照智能终端计算生成的栅格周期规则对待加工光纤进行逐线扫描，即可得到光纤布拉格啁啾相移光栅。本发明还提供了一种光纤布拉格啁啾相移光栅的制作设备，通过智能终端计算生成栅格周期规则，激光扫描装置按照该栅格周期规则对待加工光纤进行逐线扫描，该制造设备结构简单，且光栅的制造效率很高。The invention provides a fiber Bragg phase shift grating, the grating comprises a plurality of grid periods, and the set of the plurality of grid periods is D, D = (a, a + k, a + 2k, ..., a+nk, b'+k, b'+2k,...,b'+mk); where a+nk=bk, b'+mk=a', a represents the initial period value of the grating, a 'representing the end period value of the grating, k is the raster rate, b is the transition start period value of the raster, b' is the transition termination period value of the raster, and n is a positive integer. m represents a positive integer. The preparation method of the grating is simple, and the laser scanning device only needs to scan the fiber to be processed line by line according to the grid period rule calculated by the intelligent terminal along the radial direction of the fiber to be processed, thereby obtaining the fiber Bragg phase shift grating. The invention also provides a device for fabricating a fiber Bragg 啁啾 phase shift grating, which generates a grid period rule by an intelligent terminal, and the laser scanning device performs line-by-line scanning on the processed fiber according to the grid period rule, and the manufacturing device has a simple structure. And the grating is manufactured with high efficiency.
附图说明DRAWINGS
图1是本发明实施例提供的光纤布拉格啁啾相移光栅结构示意图；1 is a schematic structural view of a fiber Bragg phase shift grating provided by an embodiment of the present invention;
图2是本发明实施例提供的光纤布拉格啁啾相移光栅制作方法流程图；2 is a flow chart of a method for fabricating a fiber Bragg phase shift grating according to an embodiment of the present invention;
图3是本发明实施例提供的光纤布拉格啁啾相移光栅制作方法流程图；3 is a flow chart of a method for fabricating a fiber Bragg phase shift grating according to an embodiment of the present invention;
图4是本发明实施例提供的光纤布拉格啁啾相移光栅制作设备示意图；4 is a schematic diagram of a fiber Bragg 啁啾 phase shift grating manufacturing apparatus according to an embodiment of the present invention;
图5是本发明实施例提供的光纤布拉格啁啾相移光栅制作设备示意图；FIG. 5 is a schematic diagram of a fiber Bragg 啁啾 phase shift grating manufacturing apparatus according to an embodiment of the present invention; FIG.
图6是本发明实施例提供的光纤布拉格啁啾相移光栅制作设备示意图。FIG. 6 is a schematic diagram of a fiber Bragg phase shift grating fabrication apparatus according to an embodiment of the present invention.
本发明的实施方式Embodiments of the invention
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
作为本发明的第一个实施例，如图1所示，为本发明提供的一种光纤布拉格啁啾相移光栅，该光纤布拉格啁啾相移光栅包括若干个栅格周期，若干个所述栅格周期的集合为D，D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；As a first embodiment of the present invention, as shown in FIG. 1, a fiber Bragg phase shift grating provided by the present invention, the fiber Bragg phase shift grating includes a plurality of grid periods, and the plurality of The set of grid periods is D, D = (a, a + k, a + 2k, ..., a + nk, b' + k, b' + 2k, ..., b' + mk); wherein, a + nk =bk,b'+mk=a';
其中，a表示基于光栅的预设啁啾范围计算得出的光栅的起始周期值，a’表示基于光栅的预设啁啾范围计算得出的光栅的终止周期值，k表示基于光栅的预设啁啾性能计算得出的光栅啁啾率，b表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变起始周期值，b’表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变终止周期值，n表示正整数，m表示正整数。Where a denotes the initial period value of the grating calculated based on the preset 啁啾 range of the grating, a' denotes the end period value of the grating calculated based on the preset 啁啾 range of the grating, and k denotes a grating-based pre- Set the raster 啁啾 rate calculated by the performance, b denotes the hop transition start period value of the grating calculated based on the preset phase shift position of the grating and the preset phase shift range, and b' denotes the grating-based preset The value of the transition termination period of the raster calculated from the phase shift position and the preset phase shift range, where n represents a positive integer and m represents a positive integer.
如图1所示，该光纤布拉格啁啾相移光栅的第一个栅格周期为a，第二个栅格周期为a+k，第三个栅格周期为a+2k，依次递增，直到栅格周期为b-k（即a+nk）时，则下一个栅格周期为b’+k，下一个栅格周期递增为b’+2k，依次递增，直到栅格周期为a’（即b’+mk）时，则该光纤布拉格啁啾相移光栅结束。图1中，1001表示该光纤布拉格啁啾相移光栅的光纤包层，1002表示该光纤布拉格啁啾相移光栅的光纤纤芯，h表示该光纤布拉格啁啾相移调制的光栅条纹的长度，L1表示第一条光栅条纹，L2表示第二条光栅条纹，L1与L2之间的间距即为第一个栅格周期a。As shown in FIG. 1, the first grid period of the fiber Bragg phase shift grating is a, the second grid period is a+k, and the third grid period is a+2k, which is sequentially incremented until When the grid period is bk (ie a+nk), the next grid period is b'+k, and the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends. In Fig. 1, 1001 denotes a fiber cladding of the fiber Bragg phase shift grating, 1002 denotes an optical fiber core of the fiber Bragg phase shift grating, and h denotes a length of the grating stripe of the fiber Bragg phase shift modulation, L1 represents the first stripe stripe, L2 represents the second stripe stripe, and the spacing between L1 and L2 is the first grid period a.
综上所述，本发明第一个实施例所提供的光纤布拉格啁啾相移光栅，其为全光纤式结构，其结构简单，具备更好的灵活性，且由于其全光纤式的结构，因此具备抗电磁干扰的特性，从而使得在应用该光纤布拉格啁啾相移光栅进行检测的过程中，可避免电磁干扰对检测结果的影响。In summary, the fiber Bragg phase shift grating provided by the first embodiment of the present invention is an all-fiber structure, which has a simple structure, better flexibility, and due to its all-fiber structure. Therefore, it has the characteristics of anti-electromagnetic interference, so that the influence of electromagnetic interference on the detection result can be avoided in the process of detecting the fiber Bragg phase shift grating.
作为本发明的第二个实施例，如图2所示，本发明提供了一种光纤布拉格啁啾相移光栅制作方法，该方法包括：As a second embodiment of the present invention, as shown in FIG. 2, the present invention provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
步骤S101：智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则。Step S101: The smart terminal generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a jump start period value of the raster, and a transition termination period value of the raster.
步骤S102：激光扫描装置沿待加工光纤的径向，按照栅格周期规则对待加工光纤进行逐线扫描，以得到光纤布拉格啁啾相移光栅。Step S102: The laser scanning device scans the fiber to be processed line by line according to the rule of the grid period along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
综上所述，本发明第二个实施例所提供的光纤布拉格啁啾相移光栅制作方法，智能终端根据光栅的起始周期值等参数自动生成栅格周期规则，激光扫描装置按照该栅格周期规则，基于逐线法对待加工光纤进行逐线扫描，从而得到光纤布拉格啁啾相移光栅，该制作方法简单，制备效率高。In summary, in the method for fabricating a fiber Bragg phase shift grating provided by the second embodiment of the present invention, the intelligent terminal automatically generates a grid period rule according to parameters such as a start period value of the grating, and the laser scanning device follows the grid. According to the cycle rule, the fiber-by-line scanning is performed on the fiber to be processed according to the line-by-line method, thereby obtaining a fiber Bragg phase shift grating, which is simple in production method and high in production efficiency.
作为本发明的第三个实施例，如图3所示，本发明提供了一种光纤布拉格啁啾相移光栅制作方法，该方法包括：As a third embodiment of the present invention, as shown in FIG. 3, the present invention provides a method for fabricating a fiber Bragg phase shift grating, the method comprising:
步骤S201：智能终端利用光栅的预设啁啾范围计算得出光栅的起始周期值a以及光栅的终止周期值a’。Step S201: The smart terminal calculates the initial period value a of the grating and the end period value a' of the grating by using the preset range of the grating.
步骤S202：智能终端利用光栅的预设啁啾性能计算得出光栅啁啾率k。Step S202: The smart terminal calculates the raster defect rate k by using the preset performance of the raster.
步骤S203：智能终端利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值b以及光栅的跳变终止周期值b’。Step S203: The smart terminal calculates the hop transition start period value b of the raster and the hop transition termination period value b' of the raster by using the preset phase shift position of the raster and the preset phase shift range.
需要说明的是，上述步骤S201至S203中，如何利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值、如何利用光栅的预设啁啾性能计算得出光栅啁啾率、和如何利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值，三者的计算过程或实现方法均为现有技术，在本发明中不详加赘述。本发明在智能终端上安装有软件应用程序，在该软件应用程序中输入预设啁啾范围、预设啁啾性能、预设相移位置及预设相移范围，该软件应用程序可以自动计算得到相应的参数结果。另外，可以根据实际生产中的需要对预设啁啾范围、预设啁啾性能、预设相移位置及预设相移范围这些参数进行设定，以便最终得到所需的光纤布拉格啁啾相移光栅。It should be noted that, in the above steps S201 to S203, how to calculate the initial period value of the grating and the end period value of the grating by using the preset 啁啾 range of the grating, and how to calculate the grating by using the preset 啁啾 performance of the grating. The rate, and how to use the preset phase shift position of the grating and the preset phase shift range to calculate the jump start period value of the grating and the transition termination period value of the grating, the calculation process or implementation method of the three are all The prior art is not described in detail in the present invention. The invention installs a software application program on the smart terminal, and inputs a preset range, a preset performance, a preset phase shift position and a preset phase shift range in the software application, and the software application can automatically calculate Get the corresponding parameter results. In addition, the preset 啁啾 range, preset 啁啾 performance, preset phase shift position and preset phase shift range can be set according to the needs of actual production, so as to finally obtain the desired fiber Bragg phase. Shift grating.
步骤S204：智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则。该栅格周期规则具体如下：Step S204: The smart terminal generates a grid period rule according to the start period value of the grating, the end period value of the grating, the raster chirp rate, the jump start period value of the raster, and the transition termination period value of the raster. The grid period rules are as follows:
如图1所示，该栅格周期规则包含若干个栅格周期的集合，且该集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示光栅的起始周期值，a’表示光栅的终止周期值，k表示光栅啁啾率，b表示光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数。As shown in FIG. 1, the grid period rule includes a set of several grid periods, and the set D=(a, a+k, a+2k, ..., a+nk, b'+k, b'+ 2k,...,b'+mk); where a+nk=bk, b'+mk=a'; where a represents the starting period value of the grating, a' represents the end period value of the grating, and k represents the grating啁The rate, b represents the transition start period value of the raster, b' represents the transition termination period value of the raster, n represents a positive integer, and m represents a positive integer.
步骤S205：激光扫描装置沿待加工光纤的径向，按照栅格周期规则对待加工光纤进行逐线扫描，以得到光纤布拉格啁啾相移光栅。根据上述的栅格周期规则，则步骤S205具体包括：Step S205: The laser scanning device scans the fiber to be processed line by line according to the rule of the grid period along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating. According to the above-mentioned grid period rule, step S205 specifically includes:
首先，激光扫描装置在待加工光纤的初始位置（即第一条光栅条纹L1的位置）进行一次扫描。First, the laser scanning device performs a scan at the initial position of the fiber to be processed (i.e., the position of the first grating stripe L1).
然后，三维移动平台带动待加工光纤沿该待加工光纤的径向移动一个栅格周期Di后，激光扫描装置再进行一次扫描（即对第二条光栅条纹L2 的位置进行扫描），i的初始值为1，且D1=a（即相邻两条光栅条纹的间距为a）。Then, after the three-dimensional moving platform drives the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning device performs another scanning (ie, the second grating stripe L2) The position is scanned), the initial value of i is 1, and D1 = a (ie, the spacing between adjacent grating stripes is a).
紧接着，若所述i不等于N，则令i=i+1，返回执行上述三维移动平台带动待加工光纤沿该待加工光纤的径向移动一个栅格周期Di后，激光扫描装置再进行一次扫描，其中，N为栅格周期集合中栅格周期的总数；若i等于N，则确定扫描结束。Then, if the i is not equal to N, let i=i+1, return to perform the above three-dimensional moving platform to drive the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, and then the laser scanning device performs A scan in which N is the total number of raster periods in the set of raster periods; if i is equal to N, then the end of the scan is determined.
上述内容可以理解为，该光纤布拉格啁啾相移光栅的第一个栅格周期为a，第二个栅格周期为a+k，第三个栅格周期为a+2k，依次递增，直到栅格周期为b-k（即a+nk）时，则下一个栅格周期为b’+k，下一个栅格周期递增为b’+2k，依次递增，直到栅格周期为a’（即b’+mk）时，则该光纤布拉格啁啾相移光栅结束。The above can be understood as that the first grid period of the fiber Bragg phase shift grating is a, the second grid period is a+k, and the third grid period is a+2k, which is incremented until When the grid period is bk (ie a+nk), the next grid period is b'+k, and the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends.
需要说明的是，在本实施例中制备光纤布拉格啁啾相移光栅时，三维移动平台带动待加工光纤沿该待加工光纤的径向移动的速度v被设定在0.01mm/s至0.2mm/s的范围内，同时为了使制备的光栅的局部较均匀，将折射率强度调制的激光能量设定为Δn(10-4—10-2)，通过基于逐线法连续控制进行扫描，此时制备的光纤布拉格啁啾相移光栅沿光纤径向的线状改性区域具有连续平滑的形貌。It should be noted that, when the fiber Bragg phase shift grating is prepared in the embodiment, the speed v of the three-dimensional moving platform driving the optical fiber to be processed along the radial direction of the fiber to be processed is set to be 0.01 mm/s to 0.2 mm. In the range of /s, and in order to make the prepared grating more uniform, the laser energy of the refractive index intensity modulation is set to Δn (10 -4 -10 -2) , and the scanning is performed by continuous control based on the line-by-line method. The prepared fiber Bragg phase shift grating has a continuous smooth morphology along the linear modified region of the fiber radial direction.
需要说明的是，在本实施例中，激光扫描装置发出的激光光斑与待加工光纤的纤芯上边缘之间的距离被设定在0—20μm的范围内，这个参数范围内可以达到较好的器件性能，对光纤的调制区域较为有效，而且可以达到高效加工的要求。It should be noted that, in this embodiment, the distance between the laser spot emitted by the laser scanning device and the upper edge of the core of the fiber to be processed is set in the range of 0-20 μm, which can be better in this parameter range. The device performance is effective for the modulation area of the fiber and can meet the requirements of efficient processing.
综上所述，本发明第三个实施例所提供的光纤布拉格啁啾相移光栅制作方法，制备的全程基本都由智能终端控制完成，其制作方法简单，制备效率高，且制备成的光纤布拉格啁啾相移光栅具有很高的灵活性。In summary, the method for fabricating a fiber Bragg phase shift grating provided by the third embodiment of the present invention is basically controlled by an intelligent terminal, and the manufacturing method is simple, the preparation efficiency is high, and the prepared optical fiber is prepared. The Bragg phase shift grating has a high degree of flexibility.
作为本发明的第四个实施例，如图4所示，本发明提供了一种光纤布拉格啁啾相移光栅制作设备，该设备包括：As a fourth embodiment of the present invention, as shown in FIG. 4, the present invention provides a fiber Bragg phase shift grating fabrication apparatus, the apparatus comprising:
智能终端102，用于根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则。The smart terminal 102 is configured to generate a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a hopping start period value of the grating, and a hopping termination period value of the grating.
激光扫描装置103，用于沿待加工光纤101的径向，按照上述栅格周期规则对待加工光纤101进行逐线扫描，以得到光纤布拉格啁啾相移光栅。The laser scanning device 103 is configured to scan the optical fiber 101 to be processed line by line according to the above-mentioned grid period rule in the radial direction of the optical fiber 101 to be processed to obtain a fiber Bragg phase shift grating.
综上所述，本发明第四个实施例所提供的光纤布拉格啁啾相移光栅制作设备，智能终端102根据光栅的起始周期值等参数自动生成栅格周期规则，激光扫描装置103按照该栅格周期规则，基于逐线法对待加工光纤101进行逐线扫描，从而得到光纤布拉格啁啾相移光栅，该制作方法简单，制备效率高。In summary, in the fiber Bragg phase shift grating manufacturing apparatus provided by the fourth embodiment of the present invention, the smart terminal 102 automatically generates a grid period rule according to parameters such as a start period value of the grating, and the laser scanning device 103 follows the The grid period rule is to perform line-by-line scanning on the processed optical fiber 101 based on the line-by-line method, thereby obtaining a fiber Bragg phase shift grating, which is simple in fabrication method and high in production efficiency.
作为本发明的第五个实施例，如图5和图6所示，本发明提供了一种光纤布拉格啁啾相移光栅制作设备，该设备包括：As a fifth embodiment of the present invention, as shown in FIG. 5 and FIG. 6, the present invention provides a fiber Bragg phase shift grating fabrication apparatus, the apparatus comprising:
智能终端202用于：利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值；利用光栅的预设啁啾性能计算得出光栅啁啾率；利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值。The smart terminal 202 is configured to calculate the initial period value of the grating and the end period value of the grating by using the preset range of the grating; calculate the grating defect rate by using the preset 啁啾 performance of the grating; The phase shift position and the preset phase shift range are calculated to calculate the jump start period value of the grating and the jump termination period value of the grating.
如何利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值、如何利用光栅的预设啁啾性能计算得出光栅啁啾率、和如何利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值，三者的计算过程或实现方法均为现有技术，在本发明中不详加赘述，本发明将三者的计算过程通过计算机软件加以实现，可以自动通过智能终端进行计算，从而大大简化了人力、物力。在本实施例中，智能终端202为电脑等设备，智能终端202上安装有软件应用程序，在该软件应用程序中输入预设啁啾范围、预设啁啾性能、预设相移位置及预设相移范围，该软件应用程序可以自动计算得到相应的参数结果。另外，可以根据实际生产中的需要对预设啁啾范围、预设啁啾性能、预设相移位置及预设相移范围这些参数进行设定，以便最终得到所需的光纤布拉格啁啾相移光栅。How to use the preset 啁啾 range of the grating to calculate the initial period value of the grating and the end period value of the grating, how to calculate the grating 啁啾 rate using the preset 啁啾 performance of the grating, and how to use the preset phase of the grating The shift position and the preset phase shift range calculate the jump start period value of the grating and the jump end period value of the grating. The calculation process or implementation method of the three are all prior art, and are not described in detail in the present invention. The invention realizes the calculation process of the three by computer software, and can automatically perform calculation through the intelligent terminal, thereby greatly simplifying manpower and material resources. In this embodiment, the smart terminal 202 is a device such as a computer, and the smart terminal 202 is installed with a software application, in which a preset range, a preset performance, a preset phase shift position, and a preset are input. With the phase shift range, the software application can automatically calculate the corresponding parameter results. In addition, the preset 啁啾 range, preset 啁啾 performance, preset phase shift position and preset phase shift range can be set according to the needs of actual production, so as to finally obtain the desired fiber Bragg phase. Shift grating.
智能终端202，还用于根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则。该栅格周期规则具体如下：The smart terminal 202 is further configured to generate a grid period rule according to a start period value of the grating, a termination period value of the grating, a grating defect rate, a transition start period value of the grating, and a transition termination period value of the grating. The grid period rules are as follows:
如图1所示，该栅格周期规则包含若干个栅格周期的集合，且该集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示光栅的起始周期值，a’表示光栅的终止周期值，k表示光栅啁啾率，b表示光栅的跳变起始周期值，b’表示光栅的跳变终止周期值，n表示正整数，m表示正整数。As shown in FIG. 1, the grid period rule includes a set of several grid periods, and the set D=(a, a+k, a+2k, ..., a+nk, b'+k, b'+ 2k,...,b'+mk); where a+nk=bk, b'+mk=a'; where a represents the starting period value of the grating, a' represents the end period value of the grating, and k represents the grating啁The rate, b represents the transition start period value of the raster, b' represents the transition termination period value of the raster, n represents a positive integer, and m represents a positive integer.
激光扫描装置203，用于沿待加工光纤201的径向，按照上述栅格周期规则对待加工光纤201进行逐线扫描，以得到光纤布拉格啁啾相移光栅。在本实施例中，激光扫描装置203为飞秒激光器。根据上述的栅格周期规则，则激光扫描装置203具体用于：The laser scanning device 203 is configured to scan the optical fiber 201 to be processed line by line according to the above-mentioned grid period rule in the radial direction of the fiber 201 to be processed to obtain a fiber Bragg phase shift grating. In the present embodiment, the laser scanning device 203 is a femtosecond laser. According to the above grid period rule, the laser scanning device 203 is specifically used to:
首先，激光扫描装置203在待加工光纤201的初始位置（即第一条光栅条纹L1的位置）进行一次扫描。First, the laser scanning device 203 performs a scan at the initial position of the optical fiber 201 to be processed (i.e., the position of the first grating stripe L1).
然后，三维移动平台204带动待加工光纤201沿该待加工光纤201的径向移动一个栅格周期Di后，激光扫描装置203再进行一次扫描（即对第二条光栅条纹L2 的位置进行扫描）， i的初始值为1，且D1=a（即相邻两条光栅条纹的间距为a）。扫描的时候，激光扫描装置203的光斑所经过的位置就会形成光栅条纹。Then, after the three-dimensional moving platform 204 drives the fiber 201 to be processed to move along the radial direction of the fiber to be processed 201 for one grid period Di, the laser scanning device 203 performs another scanning (ie, the second grating stripe L2). The position is scanned), the initial value of i is 1, and D1 = a (ie, the spacing between adjacent grating stripes is a). At the time of scanning, the position where the spot of the laser scanning device 203 passes will form a grating stripe.
紧接着，若所述i不等于N，则令i=i+1，返回执行上述三维移动平台204带动待加工光纤201沿该待加工光纤201的径向移动一个栅格周期Di后，激光扫描装置再进行一次扫描，其中，N为栅格周期集合中栅格周期的总数；若i等于N，则确定扫描结束。Then, if the i is not equal to N, let i=i+1, return to perform the above-mentioned three-dimensional mobile platform 204 to drive the optical fiber 201 to be processed to move along the radial direction of the fiber to be processed 201 for one grid period Di, and then scan the laser. The device performs another scan, where N is the total number of grid periods in the set of grid periods; if i is equal to N, then the end of the scan is determined.
上述内容可以理解为，该光纤布拉格啁啾相移光栅的第一个栅格周期为a，第二个栅格周期为a+k，第三个栅格周期为a+2k，依次递增，直到栅格周期为b-k（即a+nk）时，则下一个栅格周期为b’+k，下一个栅格周期递增为b’+2k，依次递增，直到栅格周期为a’（即b’+mk）时，则该光纤布拉格啁啾相移光栅结束。The above can be understood as that the first grid period of the fiber Bragg phase shift grating is a, the second grid period is a+k, and the third grid period is a+2k, which is incremented until When the grid period is bk (ie a+nk), the next grid period is b'+k, and the next grid period is incremented to b'+2k, which is incremented until the grid period is a' (ie b When '+mk', the fiber Bragg phase shift grating ends.
三维移动平台204，主要用于水平放置待加工光纤201，且与智能终端202相连，按照智能终端202的生成的栅格周期规则的控制，带动待加工光纤201沿待加工光纤201的径向每次水平移动一个栅格周期的距离。The three-dimensional mobile platform 204 is mainly used for horizontally placing the optical fiber 201 to be processed, and is connected to the intelligent terminal 202. According to the control of the grid cycle rule generated by the intelligent terminal 202, the optical fiber 201 to be processed is driven along the radial direction of the optical fiber 201 to be processed. Moves the distance of one grid period horizontally.
光纤固定装置208，用于将待加工光纤201固定在所述三维移动平台204上。The optical fiber fixing device 208 is configured to fix the optical fiber 201 to be processed on the three-dimensional mobile platform 204.
可调控能量衰减控制装置205，其一端与激光扫描装置203连接，用于衰减激光扫描装置203发出的激光的能量。在本实施例中，可调控能量衰减控制装置205由第一个1/2波片2051、格兰棱镜2052以及第二个1/2波片2053组成。The adjustable energy attenuation control device 205 has one end connected to the laser scanning device 203 for attenuating the energy of the laser light emitted by the laser scanning device 203. In the present embodiment, the adjustable energy attenuation control device 205 is composed of a first 1/2 wave plate 2051, a gradation prism 2052, and a second 1/2 wave plate 2053.
快门光阑206，其一端与可调控能量衰减控制装置205的另一端连接，用于作为开关，以控制衰减后的激光是否对待加工光纤201进行扫描，且快门光阑206还与智能终端202连接，主要根据智能终端202的控制来进行是否打开开关的操作。The shutter stop 206 has one end connected to the other end of the adjustable energy attenuation control device 205 for use as a switch to control whether the attenuated laser is to be scanned by the processing fiber 201, and the shutter stop 206 is also connected to the smart terminal 202. The operation of whether to open the switch is mainly performed according to the control of the smart terminal 202.
显微镜207，与智能终端202通过电荷耦合元件连接，用于在光纤布拉格啁啾相移光栅制作过程中，实时采集光栅的结构成像，并将所述成像发送至智能终端202显示。通过显微镜207观察得到光栅的结构成像、条纹形貌成像等，从而人们可以根据显微镜捕捉到的成像来判断当前光栅的水平，以便在制备过程中随时调整激光能量。在本实施例中，显微镜207为高倍的油浸物镜。The microscope 207 is connected to the smart terminal 202 through a charge coupling element for acquiring the structure imaging of the grating in real time during the fabrication of the fiber Bragg phase shift grating, and transmitting the image to the smart terminal 202 for display. The structure imaging of the grating, the imaging of the stripe shape, and the like are observed through the microscope 207, so that the level of the current grating can be judged based on the imaging captured by the microscope, so that the laser energy can be adjusted at any time during the preparation process. In the present embodiment, the microscope 207 is a high power oil immersion objective.
光源209，与待加工光纤201的一端连接，用于在光纤布拉格啁啾相移光栅制作过程中发光，以使光纤布拉格啁啾相移光栅生成光谱信号。The light source 209 is connected to one end of the optical fiber 201 to be processed for emitting light during the fabrication of the fiber Bragg phase shift grating to generate a spectral signal by the fiber Bragg phase shift grating.
光谱仪210，与待加工光纤201的另一端连接，用于在光纤布拉格啁啾相移光栅制作过程中实时监测光谱信号，以便根据该光谱信号实时判断成栅的水平。The spectrometer 210 is connected to the other end of the optical fiber 201 to be processed for monitoring the spectral signal in real time during the fabrication of the fiber Bragg phase shift grating, so as to determine the level of the gate in real time according to the spectral signal.
在本实施例中，激光扫描装置203发出的激光光斑与待加工光纤201的纤芯上边缘之间的距离在0—20μm的范围内，这个参数范围内可以达到较好的器件性能，对光纤的调制区域较为有效，而且可以达到高效加工的要求。In this embodiment, the distance between the laser spot emitted by the laser scanning device 203 and the upper edge of the core of the fiber to be processed 201 is in the range of 0-20 μm, and the device performance can be achieved within this parameter range. The modulation area is more efficient and can meet the requirements of efficient processing.
在本实施例中，制备光纤布拉格啁啾相移光栅时，三维移动平台204带动待加工光纤201沿该待加工光纤201的径向移动的速度v被设定在0.01mm/s至0.2mm/s的范围内，同时为了使制备的光栅的局部较均匀，将折射率强度调制的激光能量设定为Δn(10-4—10-2)，通过基于逐线法连续控制进行扫描，此时制备的光纤布拉格啁啾相移光栅沿光纤径向的线状改性区域具有连续平滑的形貌。In the present embodiment, when the fiber Bragg phase shift grating is prepared, the speed v of the three-dimensional moving platform 204 driving the optical fiber 201 to be processed along the radial direction of the fiber to be processed 201 is set at 0.01 mm/s to 0.2 mm/ In the range of s, and in order to make the prepared grating more uniform, the laser energy of the refractive index intensity modulation is set to Δn (10 -4 -10 -2 ), and the scanning is performed by continuous control based on the line-by-line method. The prepared fiber Bragg phase shift grating has a continuous smooth shape along the linear modified region in the radial direction of the fiber.
综上所述，本发明第五个实施例所提供的光纤布拉格啁啾相移光栅制作设备，制备的全程基本都由智能终端控制完成，其设备构造简单，制作成本低，制备效率高，且制备成的光纤布拉格啁啾相移光栅具有很高的灵活性。In summary, the fiber Bragg 啁啾 phase shift grating manufacturing device provided by the fifth embodiment of the present invention is basically controlled by an intelligent terminal, and the device has the advantages of simple structure, low manufacturing cost, high preparation efficiency, and The prepared fiber Bragg phase shift grating has high flexibility.
以上所述仅为本发明的较佳实施例而已，并不用以限制发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above is only the preferred embodiment of the present invention, and is not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention. within.

Claims (10)

  1. 一种光纤布拉格啁啾相移光栅，其特征在于，所述光栅包括若干个栅格周期，若干个所述栅格周期的集合为D，D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；A fiber Bragg 啁啾 phase shift grating is characterized in that the grating comprises a plurality of grid periods, and the set of the plurality of grid periods is D, D=(a, a+k, a+2k,... , a+nk, b'+k, b'+2k,...,b'+mk);
    其中，a+nk=b-k，b’+mk=a’；Where a+nk=b-k, b’+mk=a’;
    其中，a表示基于光栅的预设啁啾范围计算得出的光栅的起始周期值，a’表示基于光栅的预设啁啾范围计算得出的光栅的终止周期值，k表示基于光栅的预设啁啾性能计算得出的光栅啁啾率，b表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变起始周期值，b’表示基于光栅的预设相移位置及预设相移范围计算得出的光栅的跳变终止周期值，n表示正整数，m表示正整数。Where a denotes the initial period value of the grating calculated based on the preset 啁啾 range of the grating, a' denotes the end period value of the grating calculated based on the preset 啁啾 range of the grating, and k denotes a grating-based pre- Set the raster 啁啾 rate calculated by the performance, b denotes the hop transition start period value of the grating calculated based on the preset phase shift position of the grating and the preset phase shift range, and b' denotes the grating-based preset The value of the transition termination period of the raster calculated from the phase shift position and the preset phase shift range, where n represents a positive integer and m represents a positive integer.
  2. 一种光纤布拉格啁啾相移光栅制作方法，其特征在于，所述方法包括：A method for fabricating a fiber Bragg 啁啾 phase shift grating, the method comprising:
    智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则；The intelligent terminal generates a grid period rule according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a jump start period value of the grating, and a transition termination period value of the grating;
    激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描，以得到所述光纤布拉格啁啾相移光栅。The laser scanning device scans the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain the fiber Bragg phase shift grating.
  3. 如权利要求2所述的方法，其特征在于：The method of claim 2 wherein:
    所述栅格周期规则包含若干个栅格周期的集合，且所述集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示所述光栅的起始周期值，a’表示所述光栅的终止周期值，k表示所述光栅啁啾率，b表示所述光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数；The grid period rule includes a set of a plurality of grid periods, and the set D = (a, a + k, a + 2k, ..., a + nk, b' + k, b' + 2k, ..., b'+mk); where a+nk=bk, b'+mk=a'; where a represents the initial period value of the grating, a' represents the end period value of the grating, and k represents the The raster 啁啾 rate, b represents the hopping start period value of the grating, b′ represents the hop transition termination period value of the grating, n represents a positive integer, and m represents a positive integer;
    则所述激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描具体包括：The laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
    所述激光扫描装置在所述待加工光纤的初始位置进行一次扫描；The laser scanning device performs a scan at an initial position of the fiber to be processed;
    三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述i的初始值为1，且D1=a；After the three-dimensional moving platform drives the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning device performs a scan, and the initial value of the i is 1, and D1=a;
    若所述i不等于N，则令i=i+1，返回执行所述三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述N为所述集合中栅格周期的总数；If the i is not equal to N, let i=i+1, return to perform the three-dimensional mobile platform to drive the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning The device performs a scan, the N being the total number of grid periods in the set;
    若所述i等于N，则确定扫描结束。If the i is equal to N, it is determined that the scan ends.
  4. 如权利要求2所述的方法，其特征在于，所述智能终端根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则之前还包括：The method according to claim 2, wherein the intelligent terminal terminates according to a start period value of the grating, a termination period value of the grating, a raster defect rate, a transition start period value of the grating, and a jump transition of the grating. The period value, before generating the grid period rule, also includes:
    智能终端利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值；The intelligent terminal calculates the initial period value of the grating and the end period value of the grating by using the preset range of the grating;
    智能终端利用光栅的预设啁啾性能计算得出光栅啁啾率；The intelligent terminal calculates the grating defect rate by using the preset performance of the grating;
    智能终端利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值。The intelligent terminal calculates the jump start period value of the grating and the jump termination period value of the grating by using the preset phase shift position of the grating and the preset phase shift range.
  5. 一种光纤布拉格啁啾相移光栅制作设备，其特征在于，所述设备包括：A fiber Bragg 啁啾 phase shift grating fabrication device, characterized in that the device comprises:
    智能终端，用于根据光栅的起始周期值、光栅的终止周期值、光栅啁啾率、光栅的跳变起始周期值以及光栅的跳变终止周期值，生成栅格周期规则；The intelligent terminal is configured to generate a grid period rule according to a starting period value of the grating, a termination period value of the grating, a grating defect rate, a hopping start period value of the grating, and a hopping termination period value of the grating;
    激光扫描装置，用于沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描，以得到光纤布拉格啁啾相移光栅。The laser scanning device is configured to scan the fiber to be processed line by line according to the grid period rule along the radial direction of the fiber to be processed to obtain a fiber Bragg phase shift grating.
  6. 如权利要求5所述的设备，其特征在于：The device of claim 5 wherein:
    所述栅格周期规则包含若干个栅格周期的集合，且所述集合D=(a,a+k,a+2k,…,a+nk,b’+k,b’+2k,…,b’+mk)；其中，a+nk=b-k，b’+mk=a’；其中，a表示所述光栅的起始周期值，a’表示所述光栅的终止周期值，k表示所述光栅啁啾率，b表示所述光栅的跳变起始周期值，b’表示所述光栅的跳变终止周期值，n表示正整数，m表示正整数；The grid period rule includes a set of a plurality of grid periods, and the set D = (a, a + k, a + 2k, ..., a + nk, b' + k, b' + 2k, ..., b'+mk); where a+nk=bk, b'+mk=a'; where a represents the initial period value of the grating, a' represents the end period value of the grating, and k represents the The raster 啁啾 rate, b represents the hopping start period value of the grating, b′ represents the hop transition termination period value of the grating, n represents a positive integer, and m represents a positive integer;
    则所述激光扫描装置沿待加工光纤的径向，按照所述栅格周期规则对所述待加工光纤进行逐线扫描具体包括：The laser scanning device scans the to-be-processed optical fiber line by line according to the grid period rule in the radial direction of the fiber to be processed, and specifically includes:
    所述激光扫描装置在所述待加工光纤的初始位置进行一次扫描；The laser scanning device performs a scan at an initial position of the fiber to be processed;
    三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述i的初始值为1，且D1=a；After the three-dimensional moving platform drives the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning device performs a scan, and the initial value of the i is 1, and D1=a;
    若所述i不等于N，则令i=i+1，返回执行所述三维移动平台带动所述待加工光纤沿所述待加工光纤的径向移动一个栅格周期Di后，所述激光扫描装置进行一次扫描，所述N为所述集合中栅格周期的总数；If the i is not equal to N, let i=i+1, return to perform the three-dimensional mobile platform to drive the fiber to be processed to move along the radial direction of the fiber to be processed for one grid period Di, the laser scanning The device performs a scan, the N being the total number of grid periods in the set;
    若所述i等于N，则确定扫描结束。If the i is equal to N, it is determined that the scan ends.
  7. 如权利要求5所述的设备，其特征在于，所述智能终端还用于：The device of claim 5, wherein the smart terminal is further configured to:
    利用光栅的预设啁啾范围计算得出光栅的起始周期值以及光栅的终止周期值；Calculating the initial period value of the grating and the termination period value of the grating by using the preset range of the grating;
    利用光栅的预设啁啾性能计算得出光栅啁啾率；The grating defect rate is calculated by using the preset 啁啾 performance of the grating;
    利用光栅的预设相移位置及预设相移范围计算得出光栅的跳变起始周期值以及光栅的跳变终止周期值。The hop transition start period value of the grating and the hop transition termination period value of the grating are calculated by using the preset phase shift position of the grating and the preset phase shift range.
  8. 如权利要求5所述的设备，其特征在于，所述设备还包括：The device of claim 5, wherein the device further comprises:
    三维移动平台，用于水平放置所述待加工光纤，及带动所述待加工光纤沿所述待加工光纤的径向每次水平移动一个栅格周期的距离；a three-dimensional mobile platform for horizontally placing the fiber to be processed, and driving the fiber to be processed to move horizontally by one grid period along the radial direction of the fiber to be processed;
    光纤固定装置，用于将所述待加工光纤固定在所述三维移动平台上；a fiber fixing device for fixing the fiber to be processed on the three-dimensional mobile platform;
    可调控能量衰减控制装置，其一端与所述激光扫描装置连接，用于衰减所述激光扫描装置发出的激光的能量；An adjustable energy attenuation control device, one end of which is coupled to the laser scanning device for attenuating energy of the laser light emitted by the laser scanning device;
    快门光阑，其一端与所述可调控能量衰减控制装置的另一端连接，用于作为开关，以控制衰减后的激光是否对所述待加工光纤进行扫描；a shutter aperture, one end of which is connected to the other end of the adjustable energy attenuation control device, and is used as a switch to control whether the attenuated laser scans the fiber to be processed;
    显微镜，与所述智能终端通过电荷耦合元件连接，用于在所述光纤布拉格啁啾相移光栅制作过程中，实时采集光栅的结构成像，并将所述成像发送至所述智能终端显示；a microscope connected to the smart terminal via a charge coupled component for acquiring a structure imaging of the grating in real time during the fabrication of the fiber Bragg phase shift grating, and transmitting the image to the smart terminal for display;
    光源，与所述待加工光纤的一端连接，用于在所述光纤布拉格啁啾相移光栅制作过程中发光，以使所述光纤布拉格啁啾相移光栅生成光谱信号；a light source connected to one end of the fiber to be processed for emitting light during the fabrication of the fiber Bragg phase shift grating to generate a spectral signal by the fiber Bragg phase shift grating;
    光谱仪，与所述待加工光纤的另一端连接，用于在所述光纤布拉格啁啾相移光栅制作过程中实时监测所述光谱信号。A spectrometer is coupled to the other end of the fiber to be processed for monitoring the spectral signal in real time during fabrication of the fiber Bragg phase shift grating.
  9. 如权利要求8所述的设备，其特征在于，所述可调控能量衰减控制装置由1/2波片和格兰棱镜组成；The apparatus according to claim 8 wherein said tunable energy attenuation control means is comprised of a 1/2 wave plate and a Glan prism;
    所述显微镜为高倍的油浸物镜。The microscope is a high power oil immersion objective.
  10. 如权利要求5所述的设备，其特征在于，所述激光扫描装置发出的激光光斑与所述待加工光纤的纤芯上边缘之间的距离在0—20μm的范围内。The apparatus according to claim 5, wherein a distance between the laser spot emitted by the laser scanning device and the upper edge of the core of the fiber to be processed is in the range of 0-20 μm.
PCT/CN2017/083713 2017-05-10 2017-05-10 Chirped phase-shifted fibre bragg grating, and manufacturing method and device therefor WO2018205161A1 (en)

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