CN1624510A - Polarization unrelated high speed photo switch - Google Patents
Polarization unrelated high speed photo switch Download PDFInfo
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- CN1624510A CN1624510A CNA2004100930242A CN200410093024A CN1624510A CN 1624510 A CN1624510 A CN 1624510A CN A2004100930242 A CNA2004100930242 A CN A2004100930242A CN 200410093024 A CN200410093024 A CN 200410093024A CN 1624510 A CN1624510 A CN 1624510A
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- 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
- G02F1/2252—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 in optical fibres
-
- 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
- G02F1/211—Sagnac type
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A high speed optical switch into relating polarization is disclosed whose characteristics is its structure: the driving device includes by circular mirror comprising of the third terminal port and the forth terminal port on one side of a coupler connecting together and a controlling device being put into the circular mirror ; the first terminal port of the is connecting to the second terminal port of three terminal ports circulator whose first terminal port is input terminal and the third terminal port is the first output terminal of the switch, the second terminal port is the second output terminal; the coupler circulator and circular mirror are all fixed on one. The advantages are rapid response speed, unconcerned to polarization and broad band response, simple structure, reliable and stable operation.
Description
Technical field
The present invention relates to photoswitch, particularly a kind of high-speed optical switch of polarization irrelevant.
Background technology
Photoswitch is to switch in the signal path in optical transmission line and the integrated optical circuit or the requisite basic device of logical operation.Be widely used in optical communication system, optical network system, fields such as optical fiber measurement system and optical fiber sensing system.
Formerly in the technology, optical fiber and a lot, the more common at present photoswitch of optical waveguide switch kind roughly can be divided into kinds such as mechanical optical switch, M-Z interfere type photoswitch, Y branching type photoswitch from structure.Because the design feature difference, more than all kinds of photoswitches respectively have superiority at isolation, switching speed, aspect such as polarization correlated, also have certain deficiency.
1, mechanical type light opens the light
Early stage mechanical optical switch is the better simply pass of an analogy switch, and it utilizes the MEMS technology to produce micro-mechanical device, changes light-path, reaches the purpose that light switches.This class photoswitch has little, the advantages such as Insertion Loss is little, polarization irrelevant, no wavelength restriction of crosstalking.But switching speed is slow (ms magnitude).Recent development be that micro mechanical structure, microactrator and optical element are integrated in micro optical switch on the same substrate based on micro mirror MEMS/MOEMS photoswitch, this light opens the light and has inherited the advantage of traditional mechanical formula photoswitch, and (the Tze-WeiYeow that on the switch execution speed, increases, Law, K.L. E., Goldenberg, A., MEMS optical switches, Communications Magazine, IEEE, 2,001 39 (11) 158-163), but because the inherent characteristic of mechanical mechanism, operating rate can only be in millisecond or inferior millisecond magnitude.Owing to the harsh requirement to machining precision, this type of photoswitch cost and difficulty of processing are all than higher in addition.
2, based on the photoswitch of M-Z interferometer structure.
Present common electrooptical switching, thermo-optical switchs etc. much all are based on the M-Z interferometer structure, this class photoswitch is owing to be based on interference effect, need not machinery does not have active, therefore has the fast advantage (Studenkov of response speed, P.V., Gokhale, M.R., Lin, W., Glesk, I., et.al., Monolithic integration of an all-optical Mach-Zehnderdemultiplexer using an asymmetric twin-waveguide structure, Photonics Technology Letters, 2001,13 (6), 600-602).But because there is the requirement of comparison strictness in M-Z mechanism to arm length difference, so processing technology is required relatively stricter, cost is also than higher.The major defect that this class light opens the light is Polarization-Sensitive, needs feedback circuit to monitor its temperature of compensation in real time and floats problem, and cost is higher.
3.Y branched optical cable switch
Y branched optical cable switch is made of electrode or the heat collector on input and output single mode waveguide, linear y branch waveguide and the outer branch-waveguide, and this photoswitch is to realize what switch switched by the refraction index changing of Y branch, (Sakuma, K.; Fujita, D.; Ishikawa, S.; Sekiguchi, T.; Low insertion-loss and high isolation polymeric Y-branchingthermo-optic switch with partitioned heater, OFC 2001, vol.3, WR3-1-WR3-3).The characteristics of this class switch are to present the step function characteristic between the output intensity of light and the input voltage, therefore have low, the advantages of simple structure and simple of driving voltage control accuracy requirement, and polarization insensitive, but also there is significant disadvantages in this class switch, as the driving voltage height, size is big or the like.
Because said method is also very imperfect, therefore high speed, polarization irrelevant, the simple novel optical switch construction of realization are still a focus in fiber optics, the waveguide optical applied research.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the defective of above-mentioned technology formerly, provide a kind of on-mechanical formula have wider bandwidth, with the high-speed optical switch of polarization irrelevant.
Technical solution of the present invention is as follows:
A kind of high-speed optical switch of polarization irrelevant, feature is its formation: the 3rd port and the 4th port of a coupling mechanism homonymy connect and compose annular mirror, in annular mirror, seal in a polarized controller, constitute the drive unit of switch, first port of this coupling mechanism connects second port of three-port circulator, second port of coupling mechanism is as second delivery outlet of this switch, and first port of described three-port circulator is as input end, and the 3rd port is first delivery outlet of this switch; Described coupling mechanism, circulator and annular mirror are fixed on the substrate.
Described coupling mechanism, circulator and annular mirror are optical fiber structure, or waveguiding structure.
Described polarized controller constitutes high-speed optical switch for adopting electrooptical material, or the controllable birefringence device of thermo-optic effect, piezobirefringence, or controlled rotatory device.
Second port that second port of described coupling mechanism connects another three-port circulator constitutes second delivery outlet of this switch.
Advantage of the present invention and characteristics are:
(1) the present invention adopts the ring mirror structure to realize the on-mechanical high-speed optical switch.Owing to do not have moving component in the design, so that switch has is simple in structure, the characteristics that response speed is fast are opened the light with the light that adopts micro electromechanical structure and to be compared, have simple in structure, reliability height, advantage such as speed is fast.
(2) the present invention adopts the ring mirror structure to realize interferometer optical switch.Because the light path that the two-beam (clockwise and counterclockwise light) of interfering is experienced is identical, overcome the difficulty of M-Z structured light path difference control accuracy, height the extinction ratio of system, and increased the responsive bandwidth of switch greatly.Have polarization irrelevant with comparing based on the photoswitch of M-Z interferometer, broadband response, stability is high, and is simple in structure, is easy to advantages such as processing.
(3) the plane of polarization rotation that polarized controller both can adopt effects such as electric light, thermo-optic effect, piezobirefringence to cause among the present invention also can directly adopt rotation effect to cause the polarization rotation, is applicable to different demands.
(4) the both available integrated Optical Implementation of the present invention can directly be used optical fiber to connect again and realize that device is easy to practicability, has high use dirigibility.
(5) the present invention adopts circulator to isolate input and output, also can use coupling mechanism as the input and output tripping device.
(6) the present invention can cascade realize 1 * N, N * N array of photoswitch as an elementary cell.
It is fast that the present invention has response speed, polarization irrelevant, and broadband response, stability is high, and is simple in structure, is easy to advantages such as processing.The present invention is as sensing measurement system, the requisite Primary Component of optical transmission system, and its use value is embodied fully, has good cost performance, and expection has good market outlook.
Description of drawings:
Fig. 1: the high-speed optical switch structural representation of embodiment of the invention 1-polarization irrelevant.
Fig. 2: high speed 2 * 2 optical switch construction synoptic diagram of embodiment of the invention 2-polarization irrelevant.
Fig. 3: the high-speed optical switch structural representation of embodiment of the invention 3-polarization irrelevant
Embodiment:
See also Fig. 1 earlier, Fig. 1: the high-speed optical switch structural representation of embodiment of the invention 1-polarization irrelevant.As seen from the figure, the formation of the high-speed optical switch of polarization irrelevant of the present invention is: the 3rd port 3.3 and the 4th port 3.4 of a coupling mechanism 3 homonymies connect and compose annular mirror 4, in annular mirror 4, seal in a polarized controller 2, constitute the drive unit of switch, first port 3.1 of this coupling mechanism 3 meets the second port one .2 of three-port circulator 1, second port 3.2 of coupling mechanism 3 is made second delivery outlet of this switch, the first port one .1 of described three-port circulator 1 is as input end, and the 3rd port one .3 makes first output terminal of this switch; Described coupling mechanism 3, circulator 1 and annular mirror 4 are fixed on the substrate 5.
Ultimate principle of the present invention is to utilize the polarization rotation susceptibility of ring mirror, introduces Polarization Control mechanism in annular mirror, the quick switching of realization light path.When polarized controller 2 not to annular mirror in polarization state when changing, be divided into two-way by the light signal of the first port one .1 input of circulator 1 through behind the coupling mechanism 3, and clockwise and to produce pi/2 phase in the light signal of transmission counterclockwise poor.When passing through coupling mechanism 3 once more with the light signal that transmits counterclockwise clockwise, interfering input light will complete first output terminal output that make this switch through the 3rd port one .3 of circulator 1.When polarized controller can be discussed during to light signal generating polarization rotate effect in two kinds of situation.
1. polarized controller is based on the situation of birefringent polarizing rotation.At first when mounted, the birefringence major axes orientation is fixed as its optimum orientation, when control signal makes in the material birefringence increase to exist between fast and slow axis λ/2 phase differential, be equivalent to the light signal polarization state to a specific axis inverting, therefore import light will be fully through second output terminal, 3.2 outputs of this switch.
2. polarized controller is based on the situation of rotation effect.The rotation of control optically activ material generation plane of polarization, when the plane of polarization rotation is equivalent to the light signal polarization state to a specific axis inverting, input light will be exported through second output terminal 3.2 of this switch fully.
Described coupling mechanism, circulator and annular mirror can think that optical fiber structure also can be waveguiding structure.
Described polarized controller 2 constitutes high-speed optical switch except but this adopts electrooptical material, can also for: the controllable birefringence device of thermo-optic effect, piezobirefringence also can be controlled rotatory device.The response speed of opening the light is mainly by its decision of response speed of described polarized controller 2.
See also Fig. 2, Fig. 2 is high speed 2 * 2 optical switch construction synoptic diagram of embodiment of the invention 2-polarization irrelevant.Embodiment 2 compares with embodiment 1, and its difference is that second port 3.2 of described coupling mechanism 3 connects second delivery outlet of second port of another three-port circulator as this switch again.Constitute 2 * 2 photoswitches.
See also Fig. 3, Fig. 3 is the high-speed optical switch synoptic diagram of embodiment of the invention 3-polarization irrelevant
The high-speed optical switch of polarization irrelevant couples together looping mirror 4 with two ports 3.3,3.4 of three-dB coupler 3.2 is polarized controller, adopts PLZT electro-optic crystal (2A) to realize.Input light is realized the coupling of optical fiber and PLZT crystal to 2B through collimating apparatus.Three-dB coupler 3 other ports 3.1 meet 3 port circulators, 1 port one .2.Circulator 1 port one .1 is as the switch input terminal mouth, and 1.3 as opening the light output port I, and three-dB coupler 3 ports 3.2 are as output switching terminal mouth II.Then with all partial fixings on casing substrate 5, constitute high-speed optical switch based on the annular mirror structure.
Its course of work and on-off principle are simple and clear.When PLZT electro-optic crystal 2A not being applied control voltage, will export by output port (1.3) through circulator 1 fully by the light signal of circulator 1 first port one .1 input.When applying control voltage at PLZT electro-optic crystal 2A, input light will be exported through second port 3.2 of coupling mechanism 3 fully.
The high-speed optical switch of polarization irrelevant of the present invention shows that it is fast to have response speed, polarization irrelevant, broadband response, advantage simple in structure, that working stability is reliable, easy to use through on probation.
Claims (4)
1, a kind of high-speed optical switch of polarization irrelevant, feature is its formation: the 3rd port (3.3) and the 4th port (3.4) of a coupling mechanism (3) homonymy connect and compose annular mirror (4), in annular mirror (4), seal in a polarized controller (2), constitute the drive unit of switch, first port (3.1) of this coupling mechanism (3) connects second port (1.2) of three-port circulator (1), second port (3.2) of coupling mechanism 3 is as delivery outlet II, first port (1.1) of described three-port circulator (1) is as input end, and the 3rd port (1.3) is made the first output terminal I; Described coupling mechanism (3), circulator (1) and annular mirror (4) are fixed on the substrate (5).
2, the high-speed optical switch of polarization irrelevant according to claim 1 is characterized in that described coupling mechanism (3), circulator (1) and annular mirror (4) are optical fiber structure, or waveguiding structure.
3, the high-speed optical switch of polarization irrelevant according to claim 1, it is characterized in that described polarized controller (2) is defended adopts electrooptical material to constitute high-speed optical switch, or the controllable birefringence device of thermo-optic effect, piezobirefringence, or controlled rotatory device.
4, the high-speed optical switch of polarization irrelevant according to claim 1 is characterized in that second port (3.2) of described coupling mechanism 3 connects second port (1.2) of three-port circulator (1) as second delivery outlet (II).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100930242A CN1308718C (en) | 2004-12-15 | 2004-12-15 | Polarization unrelated high speed photo switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100930242A CN1308718C (en) | 2004-12-15 | 2004-12-15 | Polarization unrelated high speed photo switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624510A true CN1624510A (en) | 2005-06-08 |
| CN1308718C CN1308718C (en) | 2007-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100930242A Expired - Fee Related CN1308718C (en) | 2004-12-15 | 2004-12-15 | Polarization unrelated high speed photo switch |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424894A (en) * | 2013-08-28 | 2013-12-04 | 中国科学院上海光学精密机械研究所 | Polarization independent electro-optic intensity modulator |
| CN105319739A (en) * | 2015-11-26 | 2016-02-10 | 西南交通大学 | Optical switch based on stimulated Brillouin scattering |
| CN111427122A (en) * | 2020-05-14 | 2020-07-17 | 上海交通大学 | N × N silicon-based polarization independent optical switch system |
| CN113759469A (en) * | 2021-09-23 | 2021-12-07 | 龙岩学院 | Polarization insensitive dual-channel dual-wavelength selective switch |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5419801A (en) * | 1977-07-12 | 1979-02-14 | Dainippon Screen Mfg | Method of heightening sharpness of recorded image at image scanning recorder |
| KR0133473B1 (en) * | 1994-04-13 | 1998-04-23 | 양승택 | Nonlinear fiber loop mirror type all-optical signal processing |
| JPH1022554A (en) * | 1996-06-28 | 1998-01-23 | Hoya Corp | Optical fiber amplifier |
| CN1150412C (en) * | 2000-06-22 | 2004-05-19 | 中国科学院上海光学精密机械研究所 | Optical division/insertion multiplexer capable for being configurated dynamically |
-
2004
- 2004-12-15 CN CNB2004100930242A patent/CN1308718C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424894A (en) * | 2013-08-28 | 2013-12-04 | 中国科学院上海光学精密机械研究所 | Polarization independent electro-optic intensity modulator |
| CN103424894B (en) * | 2013-08-28 | 2015-10-28 | 中国科学院上海光学精密机械研究所 | polarization independent electro-optic intensity modulator |
| CN105319739A (en) * | 2015-11-26 | 2016-02-10 | 西南交通大学 | Optical switch based on stimulated Brillouin scattering |
| CN105319739B (en) * | 2015-11-26 | 2018-03-27 | 西南交通大学 | Photoswitch based on stimulated Brillouin scattering |
| CN111427122A (en) * | 2020-05-14 | 2020-07-17 | 上海交通大学 | N × N silicon-based polarization independent optical switch system |
| CN111427122B (en) * | 2020-05-14 | 2021-05-04 | 上海交通大学 | NxN silicon-based polarization independent optical switch system |
| CN113759469A (en) * | 2021-09-23 | 2021-12-07 | 龙岩学院 | Polarization insensitive dual-channel dual-wavelength selective switch |
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| Publication number | Publication date |
|---|---|
| CN1308718C (en) | 2007-04-04 |
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Granted publication date: 20070404 Termination date: 20121215 |