CN104536081B - One kind makes the weak reflectivity optical fiber optical grating array device and method of High-precision multi-wavelength - Google Patents
One kind makes the weak reflectivity optical fiber optical grating array device and method of High-precision multi-wavelength Download PDFInfo
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- CN104536081B CN104536081B CN201410725878.1A CN201410725878A CN104536081B CN 104536081 B CN104536081 B CN 104536081B CN 201410725878 A CN201410725878 A CN 201410725878A CN 104536081 B CN104536081 B CN 104536081B
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
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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
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02123—Refractive index modulation gratings, e.g. Bragg gratings characterised by the method of manufacture of the grating
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Abstract
The weak reflectivity optical fiber optical grating array device and method of High-precision multi-wavelength is made the present invention relates to one kind, device is that the port 1 of wide spectrum light source and circulator is connected, optical fiber, the spectroanalysis instrument of the port 2 of circulator successively with sensitization are connected；The port 3 of circulator is connected with adjustable narrow band filter, optical power monitoring system successively；Preparation method is sets resolution ratio, centre wavelength and the span lengths of spectroanalysis instrument, on the optical fiber of sensitization during inscribing fiber grating, and the deviation of the centre wavelength of fiber grating is controlled within 0.1nm, obtains the transmission spectrum of weak reflectivity fiber grating；The centre wavelength and span lengths of adjustable narrow band filter are set, the reflection power of weak reflectivity fiber grating and the positional information of pip are obtained in optical power monitoring system；A fiber grating at once when the reflection power of fiber grating reaches design requirement；It steps be repeated alternatively until that having carved all fiber gratings completes the weak reflectivity optical fiber optical grating array of multi-wavelength.
Description
Technical field
It is particularly accurate to make the weak reflectivity optical fiber optical grating array dress of multi-wavelength the present invention relates to the manufacture field of optical device
Put and method, this method uses the method that reflectivity and transmitted spectrum are combined, by the center wavelength shift for monitoring transmission spectrum
And the size variation of reflectivity, it is possible to achieve the accurate manufacture weak reflectivity fiber grating of multi-wavelength.
Background technology
In fields such as Fibre Optical Sensors, fiber grating is widely used as conventional optical passive component.According to different demands,
There are different types of fiber grating, such as bragg grating；Interference formula Fibre Optical Sensor based on fiber grating needs to have
Fiber grating of antiradar reflectivity etc..For bragg grating, rejection ratio is touched on fiber grating reflectivity, three dB bandwidth, side
All it is important key index；And the reflectivity of fiber grating, it is most important for optical design.
When making ordinary optic fibre grating, wideband light source is observed by the transmission spectrum after grating using spectrometer, to calculate light
The reflectivity of grid.This method is suitable only for the grating of middle and high reflectivity.Document " Reflectivity measurement of
Weak fiber Bragg grating " (Wuhan University of Technology's journal, J.Wuhan Univ.Mater) propose a kind of light more
The method of grid cumulative measurement, by measuring the integrated reflection of this group of grating, to calculate the average reflectance of single grating.This side
Method error is big and can not identify the real reflectance of single grating.
The content of the invention
The purpose of the present invention in order to overcome the problem of above-mentioned prior art is present and deficiency can accurately be made there is provided one kind
The weak reflectivity optical fiber optical grating array device and method of multi-wavelength, by the transmission spectrum of fiber grating and the size of reflection power come
Together decide on.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
One kind make the weak reflectivity optical fiber optical grating array device of High-precision multi-wavelength, by wide spectrum light source, circulator, sensitization
Optical fiber, spectroanalysis instrument, adjustable narrow band filter, optical power monitoring system composition, it is characterised in that：Wide spectrum light source and circulator
Port 1 connect, the port 2 of circulator is connected with the optical fiber one end being sensitized, the other end and spectroanalysis instrument of the optical fiber of sensitization
Connection；The port 3 of circulator is connected with the input of adjustable narrow band filter；The output end of adjustable narrow band filter is connected to light
Power monitoring system.
It is weak that High-precision multi-wavelength is made using the above-mentioned weak reflectivity optical fiber optical grating array device of making High-precision multi-wavelength
The method of reflectivity optical fiber optical grating array, it is characterised in that carry out according to the following steps：Step one, the resolution of spectroanalysis instrument is set
Rate, centre wavelength and span lengths, on the optical fiber of sensitization during inscribing fiber grating, and by the inclined of the centre wavelength of fiber grating
Difference control obtains the transmission spectrum of weak reflectivity fiber grating within 0.1nm；Step 2, is set in adjustable narrow band filter
Cardiac wave length and span lengths, obtain the reflection power and pip of weak reflectivity fiber grating in optical power monitoring system
Positional information；A fiber grating at once when the reflection power of fiber grating reaches design requirement；Step 3, repeat step
One and step 2, the fiber gratings all until having carved complete the weak reflectivity optical fiber optical grating array of multi-wavelength.
The weak reflectivity of the weak reflectivity optical fiber optical grating array of multi-wavelength is controlled within 5% design error.
When the present invention makes High-precision multi-wavelength weak reflectivity optical fiber optical grating array, the middle cardiac wave of spectroanalysis instrument is set
It is long, in online inscribing fiber grating, it is ensured that centre wavelength deviation is controlled within 0.1nm；Seen by optical power monitoring system
The reflectivity of fiber grating is examined, makes reflectivity control within 5% design error.
Brief description of the drawings
Fig. 1 is the schematic device of the present invention；
Fig. 2 is the schematic diagram of the weak reflectivity optical fiber optical grating array of multi-wavelength of the present invention；
Embodiment
To further illustrate the particular technique content of the present invention, detailed retouch is made to the present invention below in conjunction with example and accompanying drawing
State, wherein：
Fig. 1 is refer to, apparatus of the present invention are by wide spectrum light source, circulator, the optical fiber of sensitization, spectroanalysis instrument, adjustable narrow-band
Wave filter, optical power monitoring system composition, it is characterised in that：The port 1 of wide spectrum light source and circulator is connected, the port of circulator
2 are connected with the optical fiber one end being sensitized, and the other end of the optical fiber of sensitization is connected with spectroanalysis instrument；The port 3 of circulator with it is adjustable
The input connection of narrow band filter；The output end of adjustable narrow band filter is connected to optical power monitoring system.
It is weak that High-precision multi-wavelength is made using the above-mentioned weak reflectivity optical fiber optical grating array device of making High-precision multi-wavelength
The method of reflectivity optical fiber optical grating array, it is characterised in that carry out according to the following steps：Step one, the resolution of spectroanalysis instrument is set
Rate, centre wavelength and span lengths, on the optical fiber of sensitization during inscribing fiber grating, and by the inclined of the centre wavelength of fiber grating
Difference control obtains the transmission spectrum of weak reflectivity fiber grating within 0.1nm；Step 2, is set in adjustable narrow band filter
Cardiac wave length and span lengths, obtain the reflection power and pip of weak reflectivity fiber grating in optical power monitoring system
Positional information；A fiber grating at once when the reflection power of fiber grating reaches design requirement；Step 3, repeat step
One and step 2, the fiber gratings all until having carved complete the weak reflectivity optical fiber optical grating array of multi-wavelength.The multi-wavelength is weak
The weak reflectivity of reflectivity optical fiber optical grating array is controlled within 5% design error.
Fig. 2 is refer to, Fig. 2 is the detail view of the weak reflectivity fiber grating of multi-wavelength according to the embodiment of the present invention, drawn,
Embodiment specifically includes following steps：
Step 1：Wide spectrum light source (desk-top ASE light sources) is connected with the port 1 of general commercial circulator；
Step 2：By the sensitization of the port 2 of general commercial circulator and the weak reflectivity fiber grating of the multi-wavelength to be made
Optical fiber one end is connected；The optical fiber other end of sensitization is connected with spectroanalysis instrument, sets resolution ratio, the centre wavelength of spectroanalysis instrument
And span lengths, on the optical fiber of sensitization during inscribing fiber grating, and the deviation control of the centre wavelength of fiber grating is existed
Within 0.1nm, the transmission spectrum of weak reflectivity fiber grating is obtained；
Step 3：The port 3 of general commercial circulator is connected with adjustable narrow band filter；
Step 4：The centre wavelength and bandwidth of adjustable narrow band filter are adjusted, spy is observed by optical power monitoring system
Determine the reflection power of wave length grating.Because the reflectivity of each grating is by strictly calculating, all between 1%~2%；It is logical
Luminous power prison monitoring system is crossed, when the reflectivity for observing grating is reached within the 5% of design load deviation, stops scribing；So
Afterwards, scribing for next specific wavelength grating is carried out, until all gratings all scribe completion.The sharpest edges of the method are,
Each fiber grating can accurately be scribed.
In this step, the setting of spectroanalysis instrument resolution ratio is for accurately producing the weak reflectivity fiber grating of multi-wavelength
Particularly significant, the resolution ratio of spectroanalysis instrument is less than the three dB bandwidth of fiber grating.
In order to illustrate the advantage for the weak reflectivity fiber grating reflectivity preparation method of multi-wavelength that the present invention is provided, contrast is adopted
It is combined with traditional wide spectrum light source and spectroanalysis instrument, the method for making weak reflectivity fiber grating；According to formulaTo calculate the reflectivity of weak optical fiber Bragg grating, wherein TdBFor the depth of paddy in transmission spectrum.Due to TdBValue is smaller,
It can not accurately read, and then can not accurately obtain the reflectivity of weak optical fiber Bragg grating, T can only be provideddBCorresponding reflection during ≈ 0.1dB
The big probable value of rate is 2.28%.By contrast, it finds that the weak reflectivity fiber grating preparation method of multi-wavelength that the present invention is provided
To be far superior to conventional method in accuracy.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail it is bright, should be understood that the foregoing is only the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc., should be included in the guarantor of the present invention
Within the scope of shield.
Claims (3)
1. one kind makes the weak reflectivity optical fiber optical grating array device of High-precision multi-wavelength, by wide spectrum light source, circulator, the light being sensitized
Fibre, spectroanalysis instrument, adjustable narrow band filter, optical power monitoring system composition, it is characterised in that：Wide spectrum light source and circulator
Port 1 is connected, and the port 2 of circulator is connected with the optical fiber one end being sensitized, and the other end and the spectroanalysis instrument of the optical fiber of sensitization connect
Connect；Resolution ratio, centre wavelength and the span lengths of spectroanalysis instrument are set, on the optical fiber of sensitization during inscribing fiber grating, and
The deviation of the centre wavelength of fiber grating is controlled within 0.1nm, the transmission spectrum of weak reflectivity fiber grating is obtained；Circulator
Port 3 be connected with the input of adjustable narrow band filter；The output end of adjustable narrow band filter is connected to optical power monitoring system
System.
2. it is more to make high accuracy using the weak reflectivity optical fiber optical grating array device of making High-precision multi-wavelength described in claim 1
The method of the weak reflectivity optical fiber optical grating array of wavelength, it is characterised in that carry out according to the following steps：Step one, spectroanalysis instrument is set
Resolution ratio, centre wavelength and span lengths, on the optical fiber of sensitization during inscribing fiber grating, and by the middle cardiac wave of fiber grating
Long deviation is controlled within 0.1nm, obtains the transmission spectrum of weak reflectivity fiber grating；Step 2, sets adjustable narrow-band to filter
The centre wavelength and span lengths of device, obtain the reflection power of weak reflectivity fiber grating and anti-in optical power monitoring system
The positional information of exit point；A fiber grating at once when the reflection power of fiber grating reaches design requirement；Step 3, weight
Multiple step one and step 2, the fiber gratings all until having carved complete the weak reflectivity optical fiber optical grating array of multi-wavelength.
3. the method according to claim 2 for making the weak reflectivity optical fiber optical grating array of High-precision multi-wavelength, its feature exists
In：The weak reflectivity of the weak reflectivity optical fiber optical grating array of multi-wavelength is controlled within 5% design error.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410725878.1A CN104536081B (en) | 2014-12-03 | 2014-12-03 | One kind makes the weak reflectivity optical fiber optical grating array device and method of High-precision multi-wavelength |
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| CN201410725878.1A CN104536081B (en) | 2014-12-03 | 2014-12-03 | One kind makes the weak reflectivity optical fiber optical grating array device and method of High-precision multi-wavelength |
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| CN104536081B true CN104536081B (en) | 2017-10-31 |
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| EP3650806A1 (en) * | 2018-11-08 | 2020-05-13 | Koninklijke Philips N.V. | Optical fiber sensor, optical system and method of optically interrogating an optical fiber sensor |
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| JP4714882B2 (en) * | 2005-07-01 | 2011-06-29 | 国立大学法人山梨大学 | Method and apparatus for identifying structure of Bragg grating and method for producing the same |
| CN102621609B (en) * | 2012-04-11 | 2014-05-07 | 中国科学院上海光学精密机械研究所 | Etching device and etching method for any apodised fiber bragg grating |
| CN103033205B (en) * | 2012-12-14 | 2016-04-20 | 张丽 | A kind of fiber Bragg grating (FBG) demodulator based on digitizing tunable optical source and demodulation method thereof |
| CN103777270A (en) * | 2014-02-11 | 2014-05-07 | 武汉理工大学 | Device and method for automatic, static continuous preparation of fiber bragg grating array |
| CN204422808U (en) * | 2014-12-03 | 2015-06-24 | 北京神州普惠科技股份有限公司 | A kind of making High-precision multi-wavelength weak reflectivity optical fiber optical grating array device |
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