CN105425340B - A kind of optical interleaver - Google Patents
A kind of optical interleaver Download PDFInfo
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- CN105425340B CN105425340B CN201510973424.0A CN201510973424A CN105425340B CN 105425340 B CN105425340 B CN 105425340B CN 201510973424 A CN201510973424 A CN 201510973424A CN 105425340 B CN105425340 B CN 105425340B
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- light guide
- optical fiber
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Classifications
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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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29358—Multiple beam interferometer external to a light guide, e.g. Fabry-Pérot, etalon, VIPA plate, OTDL plate, continuous interferometer, parallel plate resonator
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/225—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference in an optical waveguide structure
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/21—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour by interference
- G02F1/212—Mach-Zehnder type
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of optical interleavers, belong to technical field of optical fiber communication, and Mach-Zehnder interferometers filter volume in the prior art is larger, the unsuitable trend minimized now；Filter provided by the invention forms two arms that two guide-lighting branches be used as Mach-Zehnder interferometers in same smaller waveguide by the effect of laser, realizes that device architecture is simple, and compact-sized, performance is stablized, and flexibility is high, is easy to tune.
Description
Technical field
The invention belongs to fiber optic communication fields, more particularly, to a kind of novel optical comb filter and its preparation side
Method.
Background technology
Dense wave division multipurpose (DWDM) system is widely used in primary transmission, Optical Access Network and all optical network.
One of core devices of dwdm system are optical wavelength division multiplexing/demultiplexers.Optical interleaver is a kind of novel photonic devices,
Its appearance can effectively increase multipling channel number on optical fiber, while avoiding the complicated and too high cost of device architecture and lacking
Point is a kind of prodigious novel multiplexing demultiplexing device part of foreground.Fiber comb filter can be widely applied to multiple fields：
1, optical communication field：It can be applied to multi wave length illuminating source, multichannel dispersion compensation, multichannel bandstop filter, wave
Point multiplexing demultiplexing device, the flat gain of erbium-doped fiber amplifier, coding/decoding, cross device, acousto-optic filter and more
Modeling device in long wavelength fiber laser etc..
2, optical signal prosessing field：It can be used for generating high-speed optical pulse sequence and fiber grating demodulation.
3, sensory field of optic fibre：It can be applied to the measurement of the various physical quantitys such as temperature, refractive index.
4, microwave communication and field of signal processing：It can be applied to RoF systems.
5, field of photodetection：The electro-optic coefficient that can be applied to polar polymer measures.
Existing optical interleaver is broadly divided into two major classes according to basic technology：Based on Planar integration optical waveguide technique
Optical comb filter and all -fiber technology optical interleaver.Wherein there are complex process, works for Planar Lightwave Circuit Technology
Sequence is more, and the period is long, of high cost, needs meticulous parameter designing, loss big, with the low system of existing fiber communication system compatibility
Row problem；Thus current mainstream is the comb filter based on optical fiber.Mainly there is overlapping compound based on fiber comb filter
Type fiber bragg grating comb filter, sampled-grating Bragg grating comb filter, optical fiber mach-Zeng Deer interferometers
Type comb filter, high refractive index optical-fiber type comb filter and optical fibre Fabry-perot type comb filter.Grating type pectination
Filter production process is complicated, accurate to make difficulty；Height refraction optical fiber Sagnac ring comb filter structures needs additionally introduce
Fiber coupler, Polarization Controller, highly refracted ray and several standard single-mode fibers, fringe cost is high, and polarization loss is big, device
Part overall dimensions are big, run counter to the development trend of device miniaturization now；Traditional all -fiber Mach-Zender interferometer filter
Wave device has 2 independent interfere arms to constitute, and needs 2 couplers, and arm length difference can not accurately control, and device overall dimensions are big,
Also it is big mostly to there is insertion loss in the Mach-Zender interferometer of other single fibers, need special optical fiber, complex process, can not
Arm length difference is accurately controlled, easily by external environmental interference, not compact enough the disadvantage of structure；And optical fibre Fabry-perot type pectination is filtered
The insertion loss of wave device is big, easily by external environmental interference；
For the technical background of the above optical interleaver, in conjunction with present Research instantly, this paper presents one kind to insert
Enter to be lost small, lower Polarization Dependent Loss, simple and compact for structure, micromation, low manufacture cost, process velocity is fast, is not necessarily to coupling
Clutch, special optical fiber, other devices such as Polarization Controller, optical path difference controllable precise are complete with optical fiber not by external environmental interference
It is compatible with and has many advantages, such as the Mach-Zender interferometer filter (MZI) of comb filtering.Its above-mentioned excellent performance is in wave
In division multiplexing system and intersect in multiplexing technology with high application value.
Invention content
For the technical problem that Mach-Zender interferometer filter volume in the prior art is larger, the present invention is directed to solve
Certainly the problem of the above technology.
To achieve the above object, the present invention provides a kind of optical interleavers, which is characterized in that the filter packet
It includes：Light guide is formed on the light guide by light guide branch one and light guide branch two, the light guide branch one and the light guide branch
Two constitute the two arms of Mach-Zender interferometer.
Preferably, the light guide is optical fiber；
Preferably, the light guide branch one is parallel with the axis of the optical fiber；
Preferably, the light guide branch one is by laser action the light guide refraction index changing to be obtained.
According to another aspect of the present invention, the present invention provides a kind of preparation method of optical interleaver, features
It the described method comprises the following steps：
(1) light guide is placed in three-dimensional mobile platform, makes the incident direction for being axially perpendicular to laser beam of light guide；
(2) position of the light guide adjusted so that under the effect of the laser, refractive index changes for the subregion of light guide；
Preferably, in step (2), make laser beam focusing on machined surface；Along the axial movement three-dimensional platform of optical fiber
Optical fiber is set to be moved in machined surface；
Preferably, in step (2), the power for adjusting the laser so that it is more than the threshold value of light guide, makes laser beam
It shines directly on machined surface, the axial movement three-dimensional platform along optical fiber makes optical fiber be moved in machined surface.
Preferably, the light guide is optical fiber.
In general, contemplated above technical scheme can obtain following skill compared with prior art through the invention
Art effect：
(1) by controlling pulse energy and the focal position of laser, only cause refractive index in the segment core region of setting
Variation ensure that the integrality of optical fiber without damaging optical fiber, improve the anti-extraneous adverse circumstances interference of optical interleaver
Ability；
(2) a kind of optical interleaver based on guide-lighting branch in fibre prepared is not influenced by optic fibre characteristic, can be with
Mach-Zender optical interleaver is made on various optical fiber；
(3) device architecture of the invention is simple, compact-sized, and performance is stablized, and flexibility is high, is easy tuning；
(4) laser processing technology is reproducible, and precision is high, and at low cost, controllability is good.
Description of the drawings
Fig. 1 is a kind of structure chart based on the optical interleaver of guide-lighting branch in fibre made in the present invention；
Fig. 2 is that the present invention inscribes the optical interleaver based on guide-lighting branch in fibre using laser in inside of optical fibre
Schematic diagram；
Fig. 3 is the spectral transmission figure for including 4mm leaded light branches；
Fig. 4 is the spectral transmission figure for including 8mm leaded light branches；
Fig. 5 is the spectral transmission figure for including 17.5mm leaded light branches.
Reference sign：Optical fiber 11, guide-lighting branch 1, guide-lighting branch 2 13, Mach Zehnder interference section 14, three
Tie up displacement platform 21, laser beam 22, laser 23, microcobjective 24.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The operation principle of the present invention：
Laser is focused in light guide, by depositing laser energy, it is more than light guide to make the power of laser at laser focusing
Threshold value so that the refractive index of light guide changes.Refraction index changing region is as a kind of optical comb based on guide-lighting branch in fibre
The guide-lighting branch one of shape filter, therewith in-parallel not by the light guide region of refraction index changing as guide-lighting branch in light guide
Optical interleaver guide-lighting branch two；Two guide-lighting branches constitute the optical interleaver of guide-lighting branch in light guide
Two arms；When the optical path difference between the two-arm of Mach-Zender interferometer changes, interference fringe can be caused to move,
To realize filter wavelength can reconcile physical quantity sensing and the applications such as signal processing, present invention is particularly suitable for smaller light
It leads, below by taking optical fiber as an example.
Embodiment one：
As shown in Figure 1, a kind of optical interleaver based on guide-lighting branch in fibre, feature are：Filter response by
A series of identical passband of frequency intervals and stopband composition (its characteristic curve as comb, therefore referred to as comb filter)；Institute
It includes an optical fiber 11 and guide-lighting branch 1, guide-lighting branch 2 13 in its fibre core, a described light to state comb filter
Transmission comprising light and core leaded light bypass region on fibre；The guide-lighting branch one of the fibre core is by laser along fiber core
The light path that axially varying fiber core refractive index is formed；The leaded light branch two is isometric refractive index parallel with guide-lighting branch one
The fibre core not changed；It is described leaded light branch length according to the actual needs depending on.
The specific implementation case row that these are only the present invention do not limit protection scope of the present invention, all at this
Within the spirit and principle of invention, any modification in terms of any light guide classification and structure, laser type made equally is replaced
It changes, improve, should all be included in the protection scope of the present invention.
The preparation method of filter of the present invention：
Embodiment one：
A kind of optical interleaver production method based on guide-lighting branch in fibre, for making the base described in embodiment one
In the optical interleaver of guide-lighting branch in fibre, operating method is as follows：
1) optical fiber 11 is placed in three-dimensional mobile platform 21, makes the incidence side for being axially perpendicular to laser beam 5 of optical fiber 11
To；By micro- sem observation and the position of the optical fiber 11 is adjusted, the laser beam that laser 23 exports is made to pass through microcobjective
24 are gathered in the center of the optical fiber 11；
2) along the axial movement of the optical fiber three-dimensional platform 21 so that laser forms guide-lighting branch in the inside of optical fiber 11
Road 1 and guide-lighting branch 2 13, actually measured spectrum respectively such as Fig. 3-5, different guide-lighting leg lengths correspond to it is different from
By spectral region (FSR), the guide-lighting branch of different length can be made in practical application according to demand；
Embodiment two：
1) optical fiber 11 is placed in three-dimensional mobile platform 21, makes the incidence side for being axially perpendicular to laser beam 22 of optical fiber 11
To；
2) intensity of adjustment laser is more than the threshold value of light guide, the i.e. threshold value of optical fiber, described in micro- sem observation and adjustment
The position of optical fiber 11 makes the laser beam that laser 23 exports pass through the subregion of light guide.
In the present embodiment, the guide-lighting branch one is formed, institute since the effect of laser makes refraction index changing
The femtosecond pulse wavelength stated is 520nm, and the guide-lighting Zhi Lukuan about 4um are about 5mm；The optical fiber is general single mode
Optical fiber, core diameter about 8.3um.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (4)
1. a kind of optical interleaver, which is characterized in that the filter includes：Light guide, the light guide is optical fiber, described
Light guide branch one is formed on the fibre core of optical fiber and light guide branch two, the light guide branch one and the light guide branch two constitute horse
The two arms of conspicuous-Zeng Deer interferometers；The light guide branch one of the fibre core is by laser along the axially varying light of fiber core
The light path that fine fiber core refractive index is formed；The light guide branch two is that isometric, refractive index parallel with light guide branch one is not changed
Fibre core.
2. a kind of preparation method of optical interleaver as described in claim 1, feature exist, the method includes following
Step：
(1) light guide is placed in three-dimensional mobile platform, makes the incident direction for being axially perpendicular to laser beam of light guide；
(2) position of light guide is adjusted so that under the effect of the laser, refractive index changes for the subregion of light guide.
3. method as claimed in claim 2, which is characterized in that in step (2), make laser beam focusing on machined surface；
Axial movement three-dimensional platform along optical fiber makes optical fiber be moved in machined surface.
4. method as claimed in claim 2, which is characterized in that in step (2), the power for adjusting the laser so that it is super
The threshold value for crossing light guide, makes laser beam shine directly on machined surface, and the axial movement three-dimensional platform along optical fiber makes optical fiber add
Work moves in face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510973424.0A CN105425340B (en) | 2015-12-21 | 2015-12-21 | A kind of optical interleaver |
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| CN201510973424.0A CN105425340B (en) | 2015-12-21 | 2015-12-21 | A kind of optical interleaver |
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| CN105425340B true CN105425340B (en) | 2018-08-31 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0849231B1 (en) * | 1996-12-20 | 2004-05-06 | Corning Incorporated | Athermalized codoped optical waveguide device |
| KR100609414B1 (en) * | 2003-10-29 | 2006-09-22 | 정보통신연구진흥원 | Thermal Stability and Manufacture of All Fiber Type Interleaver |
| CN101290248B (en) * | 2007-04-18 | 2010-07-07 | 中国科学院半导体研究所 | Single-mode infra-red wavemeter based on Mach-Zehnder Interferometer filtering principle |
| CN100536261C (en) * | 2007-11-08 | 2009-09-02 | 北京交通大学 | Device for single polarization dual-wavelength fiber grating laser to generate microwave, millimeter wave |
| CN101464539B (en) * | 2009-01-04 | 2010-08-18 | 上海大学 | Mach-Zehnder interferometer based on coaxial optical fiber |
| CN103869503A (en) * | 2014-03-19 | 2014-06-18 | 华中科技大学 | Multi-wavelength optical fiber filter |
| CN104199139B (en) * | 2014-08-18 | 2017-05-03 | 华南师范大学 | Light-controlled tuning optical fiber comb filter |
| CN204903804U (en) * | 2015-09-07 | 2015-12-23 | 兰州交通大学 | Fine comb filter of equiband flat top full gloss not |
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