CN1207592C - Light-controlled multi wavelength selective photoswitch - Google Patents
Light-controlled multi wavelength selective photoswitch Download PDFInfo
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- CN1207592C CN1207592C CNB03150471XA CN03150471A CN1207592C CN 1207592 C CN1207592 C CN 1207592C CN B03150471X A CNB03150471X A CN B03150471XA CN 03150471 A CN03150471 A CN 03150471A CN 1207592 C CN1207592 C CN 1207592C
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Abstract
The present invention relates to an optical-controlled multi-wavelength selective optical switch which is composed of an optical path collimation structure, a core semiconductor optical element and a base platform, wherein the optical path collimation structure part comprises two signal light input optical fiber collimators, two signal light output optical fiber collimators and a control light input optical fiber collimator. Each pair of optical axes of the signal light input optical fiber collimators and the signal light output optical fiber collimators are strictly have the same optical path; two pairs of signal light optical fiber collimators are mutually vertical by using the center of the base platform as a basic point. An included angle between the normal line of the core semiconductor optical element and the optical axis of the horizontal signal light input optical fiber collimator is fixed; the middle is a core semiconductor material layer with photorefractive effect; high reflecting medium film layers at both sides are formed by orderly and alternately superposing silicon dioxide and titanium dioxide respectively according to the optical thickness of quarter working wavelength through vacuum evaporation to form an optical resonant cavity. The present invention can be used for optical grouping exchange systems or optical burst exchange systems, and has the advantages of high exchange speed, wavelength selectivity and expansibility, and stable performance.
Description
Technical field
The present invention relates to a kind of light-operated multi-wavelength selective light switch, belong to the photonic system field in the optical communication technique.
Background technology
In recent years, the service traffics on the telecommunications network constantly increase, and require network that more and more wideer bandwidth can be provided.In order to satisfy the demand of communication service to bandwidth, many in the world countries adopt dense wave division multipurpose (DWDM) technology that the fibre circuit of having laid is carried out dilatation, make that available bandwidth reaches about 10Tbit/s on the optical fiber, can satisfy for a long time to transmitting the wide demand of guipure.Yet, the exchange of optical communication net on each node, current light-electricity-light (OEO) technology that still adopts.Because light/power conversion device response time and electronics cross-connect (DXC), on/restriction of the bandwidth of following road (ADM) equipment own, formed the electronics speed " bottleneck " of network node, the way that overcomes electronics " bottleneck " is directly to carry out light signal to handle, and promptly builds All-Optical Communication Network.
The development of the realization of all optical network and light switching technology all depends on the technical progress of optical device, and optical exchanger spare is the core of Networks of Fiber Communications of future generation.Photoswitch is the core devices of light exchange, and it has many application scenarios in optical-fiber network.Photoswitch is the device that the light signal of an optical channel is transformed into another optical channel by certain requirement.Photoswitch can make between the light path and directly exchange, and has avoided the transfer process of light-electricity-light, has not only saved expense, and has improved the signal to noise ratio (S/N ratio) of system.Because photoswitch can make the function of exchange of network directly finish in photosphere, thus in recent years both at home and abroad to the light exchange core devices---the research of photoswitch is also very active.According to control signal, photoswitch can be divided into non-optically controlled optical switch and optically controlled optical switch two big classes generally.Because non-optically controlled optical switch must convert light signal to electric signal earlier and just can split and put line operate into, must be a bottleneck to all optical network in future.In order to overcome the restriction of electronics " bottleneck ", realize fast the light exchange, the research of optically controlled optical switch has been become to open up from light transmission, electricity exchange carry out the transition to light transmission, the important research field of light exchange New Times.
The technology of optically controlled optical switch mainly contains Mach-Zehnder type, plane reflection type, Kerr-type, NOLM several types such as (NOLM) at present.Though the photoswitch of above-mentioned several structures has all been realized optically controlled optical switch function at a high speed, and defective is separately arranged, and all be that the flashlight of all wavelengths is carried out on-off action, do not have wavelength selectivity.Have wavelength selectivity photoswitch relevant report and both at home and abroad patent is few.Document has Journal of lightwave technology in 1996, Vol.14, No.6, pp.1005.The wavelength routing switch that proposes by the David A.Smith of U.S. Case Western Reserve University based on acoustooptic effect, its frequency of sound wave is 175MHz, switch Time Created is 6ms, tuned speed is 10ms, sideband is restrained than being 9.3dB, tuning range is 150～300nm, and three dB bandwidth is 1nm.It is the limitation of its practicability that the slow and sideband of switching speed is restrained than hanging down.3 of relevant patents, calendar year 2001, the U.S. Pat 6 of people such as the Michael A Scobey application of U.S. Optical Coating Laboratory, 320,996, invented " Wavelength Selective Optical Switch " (wavelength-selective switches), adopt the mobile narrow-band-filter diaphragm of a kind of machinery mode, realize the selection of a certain fixed wave length, other wavelength are reflected.Its limitation is that switching response speed is too low, and in addition, the wavelength of selection is a certain fixing wavelength.Calendar year 2001, U.S. Tellium, Inc and Telcordia Technologies, the Jayantilal Paterl of Inc, W.John Tomlinson, the U.S. Pat 6 of Janet Lehr Jackel invention, 327,019 " Dualliquid-crystal wavelength selective optical switch " (the brilliant wavelength-selective switches of biliquid) adopts wavelength dispersion unit-grating, and Polarization Dispersion unit Wollaston Prism (wollaston prism) and liquid crystal polar modulator are formed.Owing to adopt liquid crystal, its stability and response speed are lower.Also have, what domestic patent CN1402032A " tunable wavelength selective 2 X 2 photoswitch " adopted is electrooptical effect and optics multi-reflection coherent principle, the realization wavelength is selected, its control signal remains electric signal, as above-mentioned, the non-optically controlled optical switch of this class must convert light signal to electric signal earlier and just can split and put line operate into, must be a bottleneck to all optical network in future.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of easy to implement, that have wavelength selectivity, multichannel acts on simultaneously, insert the little optically controlled optical switch of loss, can be used for light packet switch or light burst-switched at a high speed, improve the efficient of switching matrix.
The light-operated multi-wavelength selective light switch of a kind of new structure that the present invention proposes, can realize that k wavelength is simultaneously selected, k can be the arbitrary value between 1 to N, N is the dense wave division multipurpose port number that transmits simultaneously in the optical fiber, make the efficient of switch be improved, be fit to light packet switch or light burst-switched at a high speed.
The general structure of light-operated multi-wavelength selective light switch of the present invention is divided into three parts: a base platform is fixed on beam path alignment structure and core semiconductor optical element on the base platform.The beam path alignment structure division comprises two flashlight input optical fibre collimating apparatuss and two flashlight output optical fibre collimating apparatuss, and one is controlled light input optical fibre collimating apparatus totally five beam path alignment devices.The core semiconductor optical element is made up of three parts, and the centre is the core semiconductor material with photorefractive effect, and two plane strictnesses of semiconductor material are parallel, and both sides constitute optical resonator by high reflecting medium rete respectively.Base platform is the basic platform of overall optical switch, and the optical fiber collimator and the core semiconductor optical element of the optical fiber collimator of flashlight, control light all are fixed on the same base platform, and the core semiconductor optical element is positioned at the center of base platform.Two flashlight input optical fibre collimating apparatuss of beam path alignment structure division are aimed at corresponding two flashlight output optical fibre collimating apparatuss respectively, each is to the strict same light path of the optical axis of flashlight input and output optical fiber collimator, and the two pairs of flashlight optical fiber collimators are that basic point is orthogonal with the center of base platform.The optical axis of control light input optical fibre collimating apparatus is a basic point with the base platform center, and the angular range of the flashlight input optical fibre collimating apparatus optical axis of level is between 30～45 degree.The core semiconductor optical element is fixed on the center of base platform, and the angular range of the flashlight input optical fibre collimating apparatus optical axis of its normal and level is between 10～45 degree.
The core optical element of the light-operated multi-wavelength selective light of the present invention switch adopts a kind of semiconductor material with photorefractive effect.Electro-optic crystal all has photorefractive effect, for example ferroelectric crystal LiNbO
3, BaTiO
3, LiTaO
3, KnbO
3, etc. ferroelectric oxide, paraelectric phase crystal Bi
12SiO
20(BSO), Bi
12GeO
20(BGO), Bi
12TiO
20Semiconductor material such as cube silicon family oxide and GaAs, InP, CdTe such as (BTO).Because the electrooptical coefficient of semiconductor photorefractive material is quite little and the operation wavelength semiconductor photorefractive material has very wide choice, GaAs, InP and CdTe are the optimum materials of near infrared light wave band work, this is very important concerning optical communication, in addition with regard to light is sold off sensitivity, semiconductor material is also higher, and the light of InP and GaAs is sold off sensitivity than the high twice of BSO material.What therefore core optical element of the present invention was selected for use is the semiconductor material with photorefractive effect.At the optical thin film process aspect, be coated with high reflecting medium film respectively on the two sides of core semiconductor optical material, high inverse medium rete is that silicon dioxide and titania replace stack formation successively according to 1/4th operation wavelength optical thicknesses respectively, is used to improve the selection performance of switch to wavelength.By the core optical element is injected different capacity (milliwatt magnitude, tens～hundreds of milliwatt) thickness of control light to change its refractive index size and to pass through to change semiconductor material, thereby the optically controlled optical switch that realization has the multi-wavelength selectivity characteristic, the response speed and the work efficiency of raising switch.
Base platform is the basic platform of whole switch, is made up of four parts, comprises quartz substrate, the dielectric film layer of the metal level of upper surface and lower surface and metal triangular side plate.Quartz substrate adopts national standard JGS3 quartz material, the metal level of upper surface is used for two flashlight input optical fibre collimating apparatuss of light channel structure and two flashlight output optical fibre collimating apparatuss and a control light input optical fibre collimating apparatus to be fixed with the laser welding metalization of base platform, and the reinforcing of metal triangular side plate is arranged.The dielectric film layer of lower surface is the anti-reflection dielectric film of 1060nm, carries out reducing when laser welding metalization is fixing to be encapsulated the energy of the Fresnel reflection loss of incident laser in order to use the YAG laser instrument.
The present invention can be used for light packet switch or light burst switching system, and it has following advantage:
◆ exchange velocity is fast.Owing to control with light signal, realized optically controlled optical switch at a high speed.
◆ have wavelength selectivity.By regulating the watt level of control light, can realize the signal light wavelength is selected, make the light of a certain wavelength or certain several wavelength pass through.
◆ have extendability.Can select a plurality of wavelength simultaneously, simultaneously a plurality of channels be carried out the route switching effect, this will dwindle the scale of optical switching matrix greatly.
◆ implementation method is simple, good stability.Form optical resonator by semiconductor material and high reflecting medium film, be subjected to external influence factor few, stable performance.
Description of drawings
Fig. 1 is the structural representation of light-operated multi-wavelength selective light switch of the present invention.
Among Fig. 1,1,2 is two flashlight input optical fibre collimating apparatuss, and 3,4 is two flashlight output optical fibre collimating apparatuss, and 5 are control light input optical fibre collimating apparatus, and 6 is the core semiconductor optical element, and 7 is base platform.
Fig. 2 is the structural representation of core semiconductor optical device among the present invention.
Among Fig. 2, the centre of core semiconductor optical element is the core semiconductor material layer 10 with photorefractive effect, and both sides are respectively high reflecting medium rete 8 and 9.
Fig. 3 is the fundamental diagram of single wavelength-selective switches of the present invention.
Wherein, Fig. 3 (a) is that single wavelength-selective switches is selected wavelength X
1The principle of work synoptic diagram.
Fig. 3 (b) is that single wavelength-selective switches is selected wavelength X
2The principle of work synoptic diagram.
Fig. 3 (c) is that single wavelength-selective switches is selected wavelength X
3The principle of work synoptic diagram.
Fig. 3 (d) is that single wavelength-selective switches is selected wavelength X
4The principle of work synoptic diagram.
Fig. 3 (e) is the principle of work synoptic diagram that single wavelength-selective switches is selected the zero wavelength.
Fig. 4 is the fundamental diagram of dual wavelength selector switch of the present invention.
Wherein, Fig. 4 (a) is that the dual wavelength selector switch is selected wavelength X
1, λ
2The principle of work synoptic diagram.
Fig. 4 (b) is that the dual wavelength selector switch is selected wavelength X
1, λ
3The principle of work synoptic diagram.
Fig. 4 (c) is that the dual wavelength selector switch is selected wavelength X
1, λ
4The principle of work synoptic diagram.
Fig. 4 (d) is that the dual wavelength selector switch is selected wavelength X
2, λ
3The principle of work synoptic diagram.
Fig. 4 (e) is that the dual wavelength selector switch is selected wavelength X
2, λ
4The principle of work synoptic diagram.
Fig. 4 (f) is that the dual wavelength selector switch is selected wavelength X
3, λ
4The principle of work synoptic diagram.
Fig. 4 (g) is the principle of work synoptic diagram that the dual wavelength selector switch is selected the zero wavelength.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is further described.
As shown in Figure 1, the general structure of light-operated multi-wavelength selective light switch of the present invention is divided into three parts: beam path alignment structure (1～5), core semiconductor optical element 6 and base platform 7.The beam path alignment structure division comprises 1,2 and two flashlight output optical fibre collimating apparatuss 3,4 of two flashlight input optical fibre collimating apparatuss, and 5 five beam path alignment devices of control light input optical fibre collimating apparatus.Each is to the strict same light path of the optical axis of flashlight input and output optical fiber collimator, and the two pairs of flashlight optical fiber collimators are that basic point is orthogonal with the center of base platform 7.Control light input optical fibre collimating apparatus 5 is a basic point with the center of base platform 7, and the angular range of the flashlight input optical fibre collimating apparatus 1 of level is between 30～45 degree, core semiconductor optical element 6 is positioned at the center of base platform 7, the optical axis included angle of the flashlight input optical fibre collimating apparatus 1 of its normal and level is fixed, and scope is between 10～45 degree.
Flashlight input optical fibre collimating apparatus 1 emitting light path passes core semiconductor optical element 6, and the flashlight of part wavelength is selected to incide relative flashlight output optical fibre collimating apparatus 3, and the flashlight of its commplementary wave length incides another flashlight output optical fibre collimating apparatus 4; Simultaneously, another flashlight input optical fibre collimating apparatus 2 emitting light paths pass core semiconductor optical element 6, the flashlight of part wavelength incides relative flashlight output optical fibre collimating apparatus 4, and the flashlight of its commplementary wave length incides another flashlight output optical fibre collimating apparatus 3.Base platform 7 is basic platforms of overall optical switch, and the optical fiber collimator 5 and the core semiconductor optical element 6 of the optical fiber collimator 1～4 of flashlight, control light all are fixed on the same base platform 7.
Fig. 2 is the structural representation of the core semiconductor optical element 6 among the present invention.
As shown in Figure 2, core semiconductor optical element 6 is made up of three parts, and the centre is the core semiconductor material layer 10 with photorefractive effect, and two plane strictnesses of semiconductor material layer 10 are parallel, and thickness is 10
-1Mm magnitude, both sides are respectively high reflecting medium rete 8 and 9, are by vacuum evaporation two kinds of material silicon dioxide and titania alternately to be formed by stacking successively according to 1/4th operation wavelength optical thicknesses respectively, and the number of plies is 20 layers, constitute optical resonator.
Light-operated multi-wavelength selective light switch of the present invention adopts a kind of semiconductor material 10 with photorefractive effect, by controlling light input optical fibre collimating apparatus 5 to its injection different capacity (milliwatt magnitude, tens to the hundreds of milliwatt) control light with the refractive index size that changes core semiconductor material 10 and by changing the thickness of semiconductor material 10, thereby the optically controlled optical switch that realization has the multi-wavelength selectivity characteristic, the response speed and the work efficiency of raising switch.At the optical thin film process aspect, be coated with high reflecting medium film 8 and 9 respectively on the two sides of core semiconductor optical material 10, improve the selection performance of switch to wavelength.
Fig. 3 is the fundamental diagram of single wavelength-selective switches of the present invention.As shown in Figure 3, wavelength of the present invention selects principle of work as follows: the flashlight 11,12,13,14 of the individual wavelength of flashlight input optical fibre collimating apparatus input N (N=4 among the figure), wavelength is respectively λ
1, λ
2, λ
3And λ
4
Fig. 3 (a) is that switch is selected single wavelength X
1State.11 (corresponding wavelength λ in the flashlight 11,12,13,14 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
1) selected entering signal light output fiber collimating apparatus 3, the flashlight 12,13,14 of other wavelength (difference corresponding wavelength λ
2, λ
3, λ
4) entering signal light output fiber collimating apparatus 4.Wavelength is selected to realize by core semiconductor optical element 6.In Fig. 3 (a), core semiconductor optical element 6 is selected λ
1See through other wavelength (λ
2, λ
3And λ
4) flashlight all be reflected.Same principle by the control light of control light input optical fibre collimating apparatus 5 to core semiconductor optical element 6 injection different capacities, changes the refractive index of semiconductor material 10, can realize the selectivity of other wavelength is passed through.
Fig. 3 (b) is that switch is selected single wavelength X
2State.12 (corresponding wavelength λ in the flashlight 11,12,13,14 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
2) selected entering signal light output fiber collimating apparatus 3, the flashlight 11,13,14 of other wavelength (difference corresponding wavelength λ
1, λ
3, λ
4) entering signal light output fiber collimating apparatus 4.
Fig. 3 (c) is a switch menu wavelength X
3State.13 (corresponding wavelength λ in the flashlight 11,12,13,14 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
3) selected entering signal light output fiber collimating apparatus 3, the flashlight 11,12,14 of other wavelength (difference corresponding wavelength λ
1, λ
2, λ
4) entering signal light output fiber collimating apparatus 4.
Fig. 3 (d) is a switch menu wavelength X
4State.14 (corresponding wavelength λ in the flashlight 11,12,13,14 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
4) selected entering signal light output fiber collimating apparatus 3, the flashlight 11,12,13 of other wavelength (difference corresponding wavelength λ
1, λ
2, λ
3) entering signal light output fiber collimating apparatus 4.
Fig. 3 (e) is that switch is selected zero wavelength state.There is not the selected entering signal light output fiber of wavelength collimating apparatus 3 in the flashlight 11,12,13,14 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus, so the flashlight 11,12,13,14 of wavelength (difference corresponding wavelength λ
1, λ
2, λ
3, λ
4) entering signal light output fiber collimating apparatuss 4 all.
Above-mentioned switch can be used permutation and combination type C to the selectivity of single wavelength
N 1+ 1 represents, in the flashlight of N wavelength of input selected seeing through of wavelength is arranged, and other (N-1) individual wavelength are reflected and enter another output port.The status number of single wavelength-selective switches adds up to 5:
C
N 1Expression N selects 1.
Fig. 4 is the fundamental diagram of dual wavelength selector switch of the present invention.As shown in Figure 4, dual wavelength of the present invention selects principle of work as follows: the flashlight 21,22,23,24 of the individual wavelength of flashlight input optical fibre collimating apparatus input N (N=4 among the figure), wavelength is respectively λ
1, λ
2, λ
3And λ
4
Fig. 4 (a) is that switch is selected wavelength X
1, λ
2State.21 and 22 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
1And λ
2) selected entering signal light output fiber collimating apparatus 3, the flashlight 23,24 of other wavelength (difference corresponding wavelength λ
3, λ
4) entering signal light output fiber collimating apparatus 4.Same principle by the control to core semiconductor element 6, can realize the selectivity of other wavelength combinations is passed through.
Fig. 4 (b) is that switch is selected wavelength X
1, λ
3State.21 and 23 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
1And λ
3) selected entering signal light output fiber collimating apparatus 3, the flashlight 22,24 of other wavelength (difference corresponding wavelength λ
2, λ
4) entering signal light output fiber collimating apparatus 4.
Fig. 4 (c) is that switch is selected wavelength X
1, λ
4State.21 and 24 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
1And λ
4) selected entering signal light output fiber collimating apparatus 3, the flashlight 22,23 of other wavelength (difference corresponding wavelength λ
2, λ
3) entering signal light output fiber collimating apparatus 4.
Fig. 4 (d) is that switch is selected wavelength X
2, λ
3State.22 and 23 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
2And λ
3) selected entering signal light output fiber collimating apparatus 3, the flashlight 21,24 of other wavelength (difference corresponding wavelength λ
1, λ
4) entering signal light output fiber collimating apparatus 4.
Fig. 4 (e) is that switch is selected wavelength X
2, λ
4State.22 and 24 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
1And λ
2) selected entering signal light output fiber collimating apparatus 3, the flashlight 21,23 of other wavelength (difference corresponding wavelength λ
1, λ
3) entering signal light output fiber collimating apparatus 4.
Fig. 4 (f) is that switch is selected wavelength X
3, λ
4State.23 and 24 (corresponding wavelength λ in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus
3And λ
4) selected entering signal light output fiber collimating apparatus 3, the flashlight 21,22 of other wavelength (difference corresponding wavelength λ
1, λ
2) entering signal light output fiber collimating apparatus 4.
Fig. 4 (g) is that switch is selected zero wavelength state.There is not the selected entering signal light output fiber of a wavelength collimating apparatus 3 in the flashlight 21,22,23,24 of the individual wavelength of N (N=4) in the flashlight input optical fibre collimating apparatus, the flashlight 21,22,23,24 of all wavelengths (corresponding wavelength λ respectively
1, λ
2, λ
3, λ
4) entering signal light output fiber collimating apparatuss 4 all.
Above-mentioned switch can be used permutation and combination type C to the selectivity of two wavelength
N 2+ 1 represents, has two wavelength to be selected simultaneously in the flashlight of N wavelength of input and sees through, and other (N-2) individual wavelength are reflected and enter another output port.The status number of single wavelength-selective switches adds up to 5:
C
N 2Expression N selects 2.
And the like, for the multi-wavelength selector switch, to select by k wavelength simultaneously in N the input signal light wavelength, the flashlight of other (N-k) individual wavelength is reflected, thereby realizes light-operated multi-wavelength selector switch.Its on off state number adds up to: C
N k+ 1, C wherein
N kExpression N selects k.
Specific embodiment:
The key of the light-operated wavelength-selective switches of the present invention is the control to light encapsulation and control luminous power size of processing of core optics circuit elements design and subassembly.In one embodiment of the invention, what the core semiconductor optical element of light-operated wavelength-selective switches adopted is the indium phosphide semiconductor material (InP) with photorefractive effect, thickness 0.27mm, and its infrared refractive index is n=3.075, the reflection loss single face is about L
R=1.3dB, the two-sided L that then is about
R=2.6dB.What the control gloss was used is the laser of the arbitrary wavelength of wavelength coverage between 730～987nm, and it is only relevant with watt level to the control action and the Wavelength-independent of semiconductor material.Concrete parameter is as follows:
| Parameter | Maximal value | Condition |
| Service band | 1500～1600nm | Can be at any wavelength |
| Switch inserts loss | 5.8dB | To all wavelengths |
| Response time | Less than 100ps | |
| The half-wave bandwidth | 0.4nm | |
| The maximum wavelength tuning offset | 1.75nm | The control luminous power is 240mW |
| Single fiber is the service aisle number simultaneously | 3 | Channel wavelength is spaced apart 0.8nm |
Claims (3)
1, a kind of light-operated multi-wavelength selective light switch, it is characterized in that by base platform (7), the beam path alignment structure and the core semiconductor optical element (6) that are fixed on the base platform (7) constitute, the beam path alignment structure division comprises two flashlight input optical fibre collimating apparatuss (1,2), two flashlight output optical fibre collimating apparatuss (3,4) and control light input optical fibre collimating apparatus (5), two flashlight input optical fibre collimating apparatuss (1,2) aim at corresponding two flashlight output optical fibre collimating apparatuss (3 respectively, 4), each is to the strict same light path of the optical axis of flashlight input and output optical fiber collimator, and the two pairs of flashlight optical fiber collimators are that basic point is orthogonal with the center of base platform (7), control light input optical fibre collimating apparatus (5) is a basic point with the base platform center, and the angular range of the flashlight input optical fibre collimating apparatus (1) of level is between 30～45 degree, core semiconductor optical element (6) is positioned at the center of base platform (7), the optical axis included angle of the flashlight input optical fibre collimating apparatus (1) of its normal and level is fixed, scope is between 10～45 degree, the centre of core semiconductor optical element (6) is the core semiconductor material layer (10) with photorefractive effect, two plane strictnesses of semiconductor material layer (10) are parallel, and thickness is 10
-1The mm magnitude, the high reflecting medium rete (8,9) of semiconductor material layer (10) both sides constitutes optical resonator.
2, light-operated multi-wavelength selective light switch as claimed in claim 1, it is characterized in that in the described core semiconductor optical element (6), semiconductor material layer (10) with photorefractive effect adopts indium phosphide, thickness 0.27mm, its infrarefraction rate is n=3.075, high reflecting medium rete (8,9) is for alternately to be formed by stacking silicon dioxide and titania successively according to 1/4th operation wavelength optical thicknesses respectively by vacuum evaporation, and the number of plies is 20 layers.
3, light-operated multi-wavelength selective light switch as claimed in claim 1 is characterized in that controlling the laser of gloss with the arbitrary wavelength of wavelength coverage between 730～987nm.
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|---|---|---|---|
| CNB03150471XA CN1207592C (en) | 2003-08-21 | 2003-08-21 | Light-controlled multi wavelength selective photoswitch |
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|---|---|---|---|
| CNB03150471XA CN1207592C (en) | 2003-08-21 | 2003-08-21 | Light-controlled multi wavelength selective photoswitch |
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| CN1207592C true CN1207592C (en) | 2005-06-22 |
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| US9588299B2 (en) * | 2014-01-29 | 2017-03-07 | Oplink Communications, Inc. | 2×2 wavelength selective switch array |
| CN104807411A (en) * | 2015-04-27 | 2015-07-29 | 广东石油化工学院 | Device for measuring lubricant film thickness by multi-wavelength light interference and measuring method thereof |
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