CN106154424B - A kind of dual-port faraday rotation mirror and circulator - Google Patents
A kind of dual-port faraday rotation mirror and circulator Download PDFInfo
- Publication number
- CN106154424B CN106154424B CN201610846232.8A CN201610846232A CN106154424B CN 106154424 B CN106154424 B CN 106154424B CN 201610846232 A CN201610846232 A CN 201610846232A CN 106154424 B CN106154424 B CN 106154424B
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- Prior art keywords
- optical fibre
- polarization maintaining
- maintaining optical
- fibre head
- port
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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
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
-
- 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
- G02B6/264—Optical coupling means with optical elements between opposed fibre ends which perform a function other than beam splitting
Abstract
The present invention relates to fiber optic communication fields, and in particular to a kind of dual-port faraday rotation mirror and circulator.Light beam is incident from one end of dual-port faraday rotation mirror, the other end is emitted after polarization direction deflects 45 degree, and it is transmitted in subsequent reflection formula light path system, it is again introduced into dual-port faraday rotation mirror after reflection, polarization direction deflects 45 degree again, and be emitted from former entry port, 90 degree of deflection can be generated to the polarization direction of light beam, realize working effect same as single port faraday rotation mirror.Optical path of the invention uses symmetric design, the directionless selectivity of optic path, both ends can be used as the incidence end of light beam, not only eliminate the influence of dispersion and temperature characterisitic to faraday rotation mirror, realize working effect same as single port faraday rotation mirror, and may be mounted at optical path middle section, suitable for different light path systems.
Description
Technical field
The present invention relates to fiber optic communication fields, and in particular to a kind of dual-port faraday rotation mirror and circulator.
Background technique
Application of the optical fiber sensing technology in fields such as space flight and aviation, navigation inertial navigations is more and more wider.A large amount of polarization-maintaining device is answered
In the sensor using the production of polarization interference principle such as optical fibre gyro, fibre optic hydrophone, Faraday rotator is exactly crucial
Polarization-maintaining device, 90 degree, which deflect, mainly is realized to the polarization direction of light beam.
It is substantially the polarization-maintaining faraday rotation mirror of single-port mode, structure and light path schematic diagram such as Fig. 1 institute in the market
Showing, includes optical fiber head 101,102 Faraday rotator 103 of collimator and reflecting mirror 104, incident light enters from optical fiber head 101, according to
Secondary to pass through 102,103, polarization direction generates 45 degree of deflections, then the backtracking after reflecting mirror 104, after 103, polarization
Direction generates 45 degree of deflections again, after the output of optical fiber head 101, due to the light nonreciprocity of Faraday rotator, emergent light with
Incident light is compared, and polarization direction produces 90 degree of deflection altogether.Chinese patent CN20141046502, CN201310646181,
The faraday rotation mirror scheme of the announcements such as CN105589135A is all based on the design of single port principle, solves Faraday rotation
The dispersion and temperature characterisitic of mirror, such faraday rotation mirror can be only applied to the end of light path design system, and for optical fiber top
Spiral shell, the sensor-based system based on the reflection of Bragg grating wavelength, fiber optic loop, Bragg grating inherently single port access device, need
Faraday rotation mirror is placed in optical path middle section, traditional single port faraday rotation mirror can not be applied.
Summary of the invention
The application drawback of optical line terminal can only be placed on for existing single port faraday rotation mirror, the invention proposes one
Kind dual-port faraday rotation mirror, the mirror imageization by transmitting optical path design, reasonably setting incidence and outgoing polarization maintaining optical fibre head
Angle between polarisation transfer axis, can be with any position of flexible Application in the optical path, and light beam is from dual-port faraday rotation mirror
One end it is incident, other end outgoing after polarization direction deflects 45 degree, and being transmitted in subsequent reflection formula light path system, after reflection
It is again introduced into dual-port faraday rotation mirror, polarization direction deflects 45 degree again, and is emitted from former entry port, can not be by color
It dissipates and the influence of temperature characterisitic, the deflection to 90 degree of the polarization direction generation of light beam realizes and single port faraday rotation mirror
Same working effect.Optical path of the invention uses symmetric design, and the directionless selectivity of optic path, both ends can be used as light beam
Incidence end.
The technical solution of the present invention is as follows:
A kind of dual-port faraday rotation mirror, including sequentially connected first polarization maintaining optical fibre head, first collimator, faraday
Rotator, the second collimator, the second polarization maintaining optical fibre head；Light is incident from the first polarization maintaining optical fibre head or the second polarization maintaining optical fibre head；It is described
Faraday rotator is 45 degree to the rotation angle of the polarization direction of light, the key light axis direction of the first polarization maintaining optical fibre head and the
The key light axis direction of two polarization maintaining optical fibre heads is in angle of 45 degrees.
Preferably, light is from when the first polarization maintaining optical fibre head incidence, the exit end access of the second polarization maintaining optical fibre head is subsequent
Single port reflection type optical path system.
Preferably, light is from when the second polarization maintaining optical fibre head incidence, the exit end access of the first polarization maintaining optical fibre head is subsequent
Single port reflection type optical path system.
Preferably, the subsequent single port reflection type optical path system is fiber optic loop or Bragg fiber grating.For optical fiber
When gyro, subsequent single port reflection type optical path system is fiber optic loop；Sensor-based system for being reflected based on Bragg grating wavelength
When, subsequent single port reflection type optical path system is Bragg fiber grating.
The transmission path of light beam in the present invention are as follows: the first constant polarization maintaining optical fibre head enters when its polarization direction of light beam collateral security
When penetrating, initially entering makes divergent beams collimation be the first collimator of collimated light beam, enters Faraday rotation through first collimator
Device, the polarization direction of light beam rotate clockwise 45 degree, and light beam continues to transmit, into the second collimator and the second polarization maintaining optical fibre head,
And it is entered in subsequent single port reflection type optical path system by the second polarization maintaining optical fibre head；Light beam is from subsequent single port reflecting light
After the systematic reflection of road, successively pass through the second polarization maintaining optical fibre head, the second collimator, Faraday rotator, the polarization direction of light beam is again
It is secondary to rotate clockwise 45 degree, it is exported through first collimator, the first polarization maintaining optical fibre head.Light beam is from the overall process for being incident on outgoing, partially
90 degree of direction corotating of shaking, not only eliminates the influence of dispersion and temperature characterisitic to faraday rotation mirror, realize with it is single-ended
The same working effect of mouth faraday rotation mirror, and may be mounted at optical path middle section, suitable for different light path systems.Light beam
From when the second polarization maintaining optical fibre head incidence, since optical path of the invention uses symmetric design, the transmission path and aforesaid paths of light beam
It is similar.
A kind of circulator based on above-mentioned dual-port faraday rotation mirror, including sequentially connected first polarization maintaining optical fibre head,
First collimator, Faraday rotator, the second collimator, the second polarization maintaining optical fibre head, Bragg fiber grating；Light is from the first polarization-maintaining
Optical fiber head is incident, successively passes through first collimator, Faraday rotator, the second collimator, the second polarization maintaining optical fibre head, is transmitted to
Bragg fiber grating back reflection, then successively by the second polarization maintaining optical fibre head, the second collimator, Faraday rotator, the first collimation
Device is emitted from the first polarization maintaining optical fibre head.
Preferably, the Bragg fiber grating is connect by optical fiber flange with the second polarization maintaining optical fibre head.
Dual-port faraday rotation mirror of the invention, the mirror imageization by transmitting optical path design, reasonably setting it is incident and
The angle being emitted between polarization maintaining optical fibre head polarisation transfer axis, can be with any position of flexible Application in the optical path, to the inclined of light beam
Vibration direction generates 90 degree of deflection, not only eliminates the influence of dispersion and temperature characterisitic to faraday rotation mirror, realizes and list
The same working effect of port faraday rotation mirror, and dual-port faraday rotation mirror of the invention can be mounted on optical path
Middle section, suitable for different light path systems；Circulator based on dual-port faraday rotation mirror of the invention, makes Faraday rotation
Mirror can be applied to the sensing based on the reflection of Bragg optic fiber grating wavelength that traditional single port faraday rotation mirror can not be applied
In the optical path of system, relieving existing faraday rotation mirror can be only applied to the limitation of light path design system end.
Detailed description of the invention
Fig. 1 is the Faraday rotation mirror structure and light path schematic diagram of the prior art；
Fig. 2 is the structure and a kind of light path schematic diagram of dual-port faraday rotation mirror of the invention；
Fig. 3 is the structure and another light path schematic diagram of dual-port faraday rotation mirror of the invention；
Fig. 4 is the structure and light path schematic diagram of circulator of the present invention.
In figure, 101: optical fiber head, 102: collimator, 103: Faraday rotator, 104: reflecting mirror, 201,301,401: the
One polarization maintaining optical fibre head, 202,302,402: first collimator, 203,303,403: Faraday rotator, 204,304,404: the second
Collimator, 205,305,405: the second polarization maintaining optical fibre heads, 206,306: subsequent single port reflection type optical path system, 406:Bragg
Fiber grating, 407: optical fiber flange.
Specific embodiment
Below in conjunction with drawings and examples, the invention will be further described.
Embodiment 1:
As shown in Fig. 2, the dual-port faraday rotation mirror of the present embodiment, including sequentially connected first polarization maintaining optical fibre head
201, first collimator 202, Faraday rotator 203, the second collimator 204, the second polarization maintaining optical fibre head 205；Light is protected from first
Inclined optical fiber head 201 is incident；Wherein, the first polarization maintaining optical fibre head 201 and the second polarization maintaining optical fibre head 205 are used for transmission light beam and guarantee it
Polarization direction is constant, and first collimator 202 and the second collimator 204 are used to converge the light beam of diverging for collimated light beam；It is described
The rotation angle of the polarization direction of 203 pairs of light of Faraday rotator is 45 degree, the primary optical axis side of the first polarization maintaining optical fibre head 201
In angle of 45 degrees to the key light axis direction with the second polarization maintaining optical fibre head 205.
In the present embodiment, the second polarization maintaining optical fibre head 205 is linked into subsequent single port reflection type optical path system 206, is made
The polarization direction of incident beam is only vertical polarization, and incident light is incident from the first polarization maintaining optical fibre head 201, into the first collimation
Device 202, after so that divergent beams is become collimated light beam, into Faraday rotator 203, the polarization direction of light beam rotates clockwise 45
Degree；Light beam continues to transmit, and into the second collimator 204 and the second polarization maintaining optical fibre head 205, and passes through the second polarization maintaining optical fibre head 205
It enters in subsequent single port reflection type optical path system 206；Light beam from subsequent single port reflection type optical path system 206 reflection after,
Successively pass through the second polarization maintaining optical fibre head 205, the second collimator 204, is again introduced into Faraday rotator 203, the polarization side of light beam
To rotating clockwise 45 degree again, i.e., light beam polarization direction at this time becomes only horizontal polarization direction, the polarization of horizontal direction
Light is exported through first collimator 202, the first polarization maintaining optical fibre head 201, and the polarization direction of emergent light and incident light is at 90 degree of angles.
Embodiment 2:
As shown in figure 3, the dual-port faraday rotation mirror of the present embodiment, including sequentially connected first polarization maintaining optical fibre head
301, first collimator 302, Faraday rotator 303, the second collimator 304, the second polarization maintaining optical fibre head 305；Light is protected from second
Inclined optical fiber head 305 is incident；Wherein, the first polarization maintaining optical fibre head 301 and the second polarization maintaining optical fibre head 305 are used for transmission light beam and guarantee it
Polarization direction is constant, and first collimator 302 and the second collimator 304 are used to converge the light beam of diverging for collimated light beam；It is described
The rotation angle of the polarization direction of 303 pairs of light of Faraday rotator is 45 degree, the primary optical axis side of the first polarization maintaining optical fibre head 301
In angle of 45 degrees to the key light axis direction with the second polarization maintaining optical fibre head 305.
In the present embodiment, the first polarization maintaining optical fibre head 301 is linked into subsequent single port reflection type optical path system 306, is made
The polarization direction of incident beam is only horizontal polarization direction, and the fast axis direction of incident light from the second polarization maintaining optical fibre head 305 is incident, into
Enter the second collimator 304, after so that divergent beams is become collimated light beam, into Faraday rotator 303, the polarization direction of light beam is suitable
Hour hands rotate 45 degree；Light beam continues to transmit, and into first collimator 302 and the first polarization maintaining optical fibre head 301, and passes through the first polarization-maintaining
Optical fiber head 301 enters in subsequent single port reflection type optical path system 306；Light beam is from subsequent single port reflection type optical path system
After 306 reflections, successively passes through the first polarization maintaining optical fibre head 301, first collimator 302, be again introduced into Faraday rotator 303, light
The polarization direction of beam rotates clockwise 45 degree again, i.e., light beam polarization direction at this time becomes only vertical polarization, vertically
The polarised light in direction is exported through the second collimator 304 from the slow-axis direction of the second polarization maintaining optical fibre head 305, emergent light and incident light
Polarization direction at 90 degree of angles.
Embodiment 3:
As shown in figure 4, the circulator based on dual-port faraday rotation mirror of the present embodiment, including sequentially connected first
Polarization maintaining optical fibre head 401, first collimator 402, Faraday rotator 403, the second collimator 404, the second polarization maintaining optical fibre head 405,
Bragg fiber grating 406.Wherein, the first polarization maintaining optical fibre head 401 and the second polarization maintaining optical fibre head 405 are used for transmission light beam and guarantee
Its polarization direction is constant, and first collimator 402 and the second collimator 403 are used to converge the light beam of diverging for collimated light beam, method
Draw rotator 403 for the polarization direction of light beam to be rotated 45 degree, Bragg fiber grating 406 is for reflected wavelengths
Polarised light.
In the present embodiment, the polarization direction of incident beam is only vertical polarization, and light beam is from the first polarization maintaining optical fibre head 401
Slow-axis direction it is incident, successively pass through first collimator 402, Faraday rotator 403, polarization direction rotates clockwise 45 degree,
Successively pass through the second collimator 404, the second polarization maintaining optical fibre head 405 again, is transmitted to 406 back reflection of Bragg fiber grating, reflected light
Successively pass through the second polarization maintaining optical fibre head 405, the second collimator 404, Faraday rotator 403, polarization direction is revolved clockwise again
Turn 45 degree, by first collimator 402, is emitted from the fast axis direction of the first polarization maintaining optical fibre head 401.
Bragg fiber grating 406 in the present embodiment is connected to the second polarization maintaining optical fibre head 405 by end optical fiber flange plate 407
On.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention,
Various modifications to these embodiments will be readily apparent to those skilled in the art.
It should be understood that this application is intended to cover any variations, uses, or adaptations of the utility model, this
A little variations, uses, or adaptations follow general principle of the invention and including the undocumented the art of the present invention
In common knowledge or conventional techniques.
Claims (3)
1. a kind of dual-port faraday rotation mirror, it is characterised in that: including sequentially connected first polarization maintaining optical fibre head, the first collimation
Device, Faraday rotator, the second collimator, the second polarization maintaining optical fibre head；Light is from the first polarization maintaining optical fibre head or the second polarization maintaining optical fibre head
It is incident；The Faraday rotator is 45 degree to the rotation angle of the polarization direction of light, the key light of the first polarization maintaining optical fibre head
Axis direction and the key light axis direction of the second polarization maintaining optical fibre head are in angle of 45 degrees；Light is from when the first polarization maintaining optical fibre head incidence, and described
The exit end of two polarization maintaining optical fibre heads accesses subsequent single port reflection type optical path system；Light is from when the second polarization maintaining optical fibre head incidence, institute
The exit end for stating the first polarization maintaining optical fibre head accesses subsequent single port reflection type optical path system.
2. a kind of dual-port faraday rotation mirror as described in claim 1, it is characterised in that: the subsequent single port is reflective
Light path system is fiber optic loop or Bragg fiber grating.
3. a kind of circulator based on dual-port faraday rotation mirror of any of claims 1 or 2, it is characterised in that: including according to
First polarization maintaining optical fibre head of secondary connection, first collimator, Faraday rotator, the second collimator, the second polarization maintaining optical fibre head,
Bragg fiber grating；Light is incident from the first polarization maintaining optical fibre head, successively by first collimator, Faraday rotator, the second collimation
Device, the second polarization maintaining optical fibre head, are transmitted to Bragg fiber grating back reflection, then successively by the second polarization maintaining optical fibre head, the second collimation
Device, Faraday rotator, first collimator are emitted from the first polarization maintaining optical fibre head.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846232.8A CN106154424B (en) | 2016-09-23 | 2016-09-23 | A kind of dual-port faraday rotation mirror and circulator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610846232.8A CN106154424B (en) | 2016-09-23 | 2016-09-23 | A kind of dual-port faraday rotation mirror and circulator |
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| CN106154424A CN106154424A (en) | 2016-11-23 |
| CN106154424B true CN106154424B (en) | 2019-02-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107589490B (en) * | 2017-09-04 | 2019-08-23 | 中国电子科技集团公司第四十一研究所 | A kind of push-pull type polarization rotation retarder and method for optical fibre interference |
| CN108490547A (en) * | 2018-04-12 | 2018-09-04 | 上海中科光纤通讯器件有限公司 | Line polarisation converter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546219A (en) * | 1994-03-03 | 1996-08-13 | Matsushita Electric Industrial Co., Ltd. | Optical circuit and light transmission system and method using the same |
| WO2006085650A1 (en) * | 2005-02-14 | 2006-08-17 | Namiki Seimitsu Houseki Kabushiki Kaisha | Wavelength monitoring device |
| CN105705907A (en) * | 2013-06-11 | 2016-06-22 | 姚晓天 | Energy-efficient optic gyroscope devices |
| CN105928501A (en) * | 2016-04-27 | 2016-09-07 | 西安中科华芯测控有限公司 | Integrated optical circuit structure fiber-optic gyroscope and work method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7746476B2 (en) * | 2007-07-11 | 2010-06-29 | Emcore Corporation | Fiber optic gyroscope |
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- 2016-09-23 CN CN201610846232.8A patent/CN106154424B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546219A (en) * | 1994-03-03 | 1996-08-13 | Matsushita Electric Industrial Co., Ltd. | Optical circuit and light transmission system and method using the same |
| WO2006085650A1 (en) * | 2005-02-14 | 2006-08-17 | Namiki Seimitsu Houseki Kabushiki Kaisha | Wavelength monitoring device |
| CN105705907A (en) * | 2013-06-11 | 2016-06-22 | 姚晓天 | Energy-efficient optic gyroscope devices |
| CN105928501A (en) * | 2016-04-27 | 2016-09-07 | 西安中科华芯测控有限公司 | Integrated optical circuit structure fiber-optic gyroscope and work method thereof |
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