CN105892083B

CN105892083B - The optical routing method and apparatus for controlling optical signal, selecting wavelength

Info

Publication number: CN105892083B
Application number: CN201610190014.3A
Authority: CN
Inventors: 林先锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-29
Filing date: 2011-12-29
Publication date: 2018-09-28
Anticipated expiration: 2031-12-29
Also published as: CN103185970B; CN103185970A; CN105892083A

Abstract

This divisional application is related to a kind of optical routing method and apparatus for controlling optical signal, selecting wavelength, and the method for the control optical signal includes：The extraordinary ray component and ordinary light component being kept completely separate in incident light, the polarised light after being detached；The polarization state of polarised light after switching separation, converts variation of the polarised light in polarization state to the variation on spatial position and obtains the first translation rear polarizer light；Rear polarizer light reflection is translated by described first to be simultaneously rotated by 90 ° the polarization state of polarised light；It converts variation of the rotation rear polarizer light in polarization state to the variation on propagation path and obtains the second translation rear polarizer light；It synthesizes the second translation rear polarizer light and is emitted.After this divisional application embodiment, the optical signal quality of routing can be improved, while reducing the volume of route device.

Description

The optical routing method and apparatus for controlling optical signal, selecting wavelength

The application is application number 201110449977.8,29 days December 2011 applying date, denomination of invention " translation polarization The divisional application of light, control optical signal, the optical routing method and apparatus for selecting wavelength ".

Technical field

The present invention relates to technical field of photo communication, more particularly, to the optical routing method for controlling optical signal, selecting wavelength And device.

Background technology

Networks of Fiber Communications is the pillar of advanced information society, carries almost all of contemporary data communication, including electricity Words, TV, internet, mobile communication etc..Current optical fiber telecommunications system is based primarily upon optical wavelength division multiplexing (WDM) technology, the skill Different wavelength signals are multiplexed into same root optical fiber and are transmitted by art, to be added significantly to the appearance of optical fiber telecommunications system Amount.However due to lacking intelligent optical fibre device, the optical wavelength routing of traditional wdm system is fixed, it is necessary to carry out net Network determines optical wavelength routing when designing, and the construction and maintenance of network also must be by manually completing.Simultaneously as Netowrk tape Wide demand is difficult to estimated in advance and plans, in the new data service of network upgrade or offer, it is often necessary to re-start net Network designs and adjustment construction.These disadvantages cause the construction of traditional wdm system and operation maintenance cost to remain high, and hinder The further development of WDM optical-fiber networks.

The appearance of reconfigurable optical add/drop multiplexer (ROADM) changes this situation.The WDM network sections constructed with ROADM Point can switch the route direction of different wave length optical signal according to remote control signal, i.e., dynamically configure service wavelength up and down, And the power for managing each service wavelength, to avoid, in the new data service of network upgrade or offer, re-starting light net The design and adjustment construction of network.Simultaneously as ROADM is compatible with all service wavelengths, therefore difference can be selected without restriction Operation wavelength, to which the flexibility of network greatly improved.Therefore, the application of ROADM makes WDM optical-fiber networks develop into height intelligence The New Generation Optical network of energyization can not only greatly reduce operation and the maintenance cost of network, and can rapidly provide each The new data service of kind, has become the developing direction of WDM optical-fiber networks.

The core architecture of one traditional 1*2ROADM is as shown in Fig. 1, by the Wave decomposing multiplexer of an input terminal (DEMUX) 101,1*2 array of photoswitch 102, adjustable optical attenuator (VOA) array 103 and 105 and two of two output ends The wavelength division multiplexer (MUX) 104 and 106 of a output end forms.The input and output port medium of ROADM is all optical fiber, wherein The WDM wavelength of transmission and its interval are fixed, as shown in the spectrum of input terminal in attached drawing 1.Each cylindricality generation in spectrum One wavelength signals of table, width represents its channel width, and its height represents its watt level.Attached input letter shown in FIG. 1 Number include m wavelength signals λ 1~λ m, power is different.When these optical signals input ports enter the DEMUX of ROADM After module 101, is opened by wavelength separated and respectively by output port 1~λ of λ m outputs of DEMUX modules 101, each wavelength corresponds to One output port.These optical signals subsequently enter the array of photoswitch 102 being made of m 1*2 photoswitch, each in array A photoswitch corresponds to a wavelength, and input terminal connects the output port of respective wavelength on DEMUX, and two output port is then The input port of respective wavelength on MUX 104 and MUX 106 is corresponded to respectively.Therefore, by remote control array of photoswitch 102 The switching state of each photoswitch, you can the route direction of each wavelength is selected, to which the wavelength signals of input are divided into two groups, Two MUX of ROADM are gone to respectively.After above two groups of wavelength signals leave array of photoswitch, the preposition of corresponding MUX is arrived respectively VOA arrays 103 and 105.The two arrays are all made of m VOA, and each VOA corresponds to a wavelength, and is believed according to remote control Number the power of optical signal therethrough is adjusted.Last two groups of wavelength signals arrive separately at phase on MUX 104 and MUX 106 The input port answered, and it is incorporated into output port 1 and output port 2 exports.As shown in Fig. 1, ROADM by power not M same input wavelength signal is assigned to two output ports by the combination of selection, and passes through the output for adjusting each wavelength Power realizes flat output spectrum (i.e. each wavelength power is consistent).Certainly, can also be passed through according to the needs of practical application The output power of each wavelength is adjusted to obtain arbitrary output spectrum.

The structure of multiple output port 1*N ROADM is similar with 1*2ROADM, and only array of photoswitch therein is by 1*N light Switch composition, and the quantity of VOA arrays MUX is all respectively N number of.Its concrete operating principle is identical as above-mentioned 1*2 nodes, herein not Tire out again and states.Be not difficult inference, the structure of N*1 (i.e. N number of input terminal, 1 output end) ROADM is identical as 1*N ROADM, it is different only Be DEMUX and MUX function it is opposite.

Since existing ROADM systems are by device composition that is discrete, having a single function, not only large number of, Er Qieqi Complexity is connected between part, leads to the bulky of system.And the device for forming system is all the optical fibre device of individual packages, at it Internal optical signal will pass through optical fiber-interior media-optical fiber transformation, every time transformation can all bring optical signal quality deterioration and The loss of luminous power, and then the performance of whole system is extremely limited.

Invention content

The embodiment of the present invention proposes a kind of method of control optical signal, can improve the optical signal quality of routing, subtract simultaneously The volume of few route device.

The embodiment of the present invention also proposes a kind of device of control optical signal, can improve the optical signal quality of routing, simultaneously Reduce the volume of route device.

The embodiment of the present invention also proposes a kind of optical routing method of selection wavelength, can improve the optical signal quality of routing, The volume of route device is reduced simultaneously.

The embodiment of the present invention also proposes a kind of optical routing device of selection wavelength, can improve the optical signal quality of routing, The volume of route device is reduced simultaneously.

The technical solution of the embodiment of the present invention is as follows：

A method of control optical signal, the method includes：

The extraordinary ray component and ordinary light component being kept completely separate in incident light, the polarised light after being detached；

The polarization state of polarised light after switching separation, converts in space bit variation of the polarised light in polarization state to The variation set obtains the first translation rear polarizer light；

Rear polarizer light reflection is translated by described first to be simultaneously rotated by 90 ° the polarization state of polarised light；

Variation of the rear polarizer light in polarization state will be rotated to be converted into after the variation on propagation path obtains the second translation Polarised light；

It synthesizes the second translation rear polarizer light and is emitted.

The extraordinary ray component being kept completely separate in incident light and ordinary light component include：

Incident light is divided into extraordinary ray component and ordinary light component；

Extraordinary ray component and ordinary light component are rotated to identical polarization direction；

The identical polarization state of polarised light is rotated 45 degree, obtain polarised light corresponding with the extraordinary ray component of incident light and The polarization state of polarised light corresponding with the ordinary light component of incident light, the corresponding polarised light is identical.

Extraordinary ray component and ordinary light component are rotated by 90 ° respectively；

Detach postrotational extraordinary ray component and ordinary light component；

A kind of device of control optical signal, described device include input and output array, division module, at least one polarization tune Device, at least one light beam translation piece, polarization apparatus and speculum processed；

Input and output array, for receiving incident light and output emergent light；

Division module, the extraordinary ray component for being kept completely separate in incident light and ordinary light component, after being detached Polarised light, and synthesize the polarised light that light polarization modulator returns；

Light polarization modulator, the polarization state for switching the polarised light after the separation obtain switching rear polarizer light；

Light beam translation piece, for converting on spatial position variation of the switching rear polarizer light in polarization state to Variation obtains translation rear polarizer light；

Polarization apparatus, the polarization state for rotating the translation rear polarizer light；

Speculum is used for polarization by reflection light.

The division module includes：Uniaxial crystal, at most two reversible optical rotation plates and irreversible optical rotation plate；

Uniaxial crystal, for incident light to be divided into extraordinary ray component and ordinary light component, and two beam polarization states of synthesis The mutually perpendicular polarised light in direction；

Reversible optical rotation plate, for rotating extraordinary ray component and ordinary light component to identical polarization direction, and by two The postrotational polarised light of beam rotates respectively obtains the two mutually perpendicular polarised lights in beam polarization state direction；

Irreversible optical rotation plate obtains two beam polarization state phases for the polarization state of the identical polarised light of polarization state to be rotated 45 degree Same polarised light, and the polarization state of two beams translation rear polarizer light is rotated 45 degree.

The division module includes：First uniaxial crystal, the first reversible optical rotation plate, the second uniaxial crystal, at most two rotations Mating plate and irreversible optical rotation plate；

First uniaxial crystal, for incident light to be divided into extraordinary ray component and ordinary light component, and two beams of synthesis are inclined The mutually perpendicular polarised light in polarization state direction；

First reversible optical rotation plate, for extraordinary ray component and ordinary light component to be rotated by 90 ° respectively, and by two beams The polarization state of the orthogonal polarised light in polarization state direction is rotated by 90 ° respectively；

Second uniaxial crystal for detaching postrotational extraordinary ray component and ordinary light component, and increases by two beams polarization The distance of the mutually perpendicular polarised light in state direction；The direction phase of the optical axis of second uniaxial crystal and first uniaxial crystal Instead；

The input and output array includes：

Fiber array, for receiving the emergent light inside external incident light and output；

Microlens array, for collimating the emergent light inside external incident light and convergence.

The polarization apparatus is optical rotation plate or light polarization modulator, and the light polarization modulator rotates the translation by driving voltage The polarization state of rear polarizer light is to adjust the power of emergent light.

A kind of optical routing method of selection wavelength, this method include：

By in incident light extraordinary ray component and ordinary light component it is completely separable, obtain the consistent polarised light of polarization state；

According to the consistent polarised light of polarization state described in different wavelength separateds；

The polarization state for switching polarised light respectively, converts on spatial position variation of the polarised light in polarization state to Variation obtain the first translation rear polarizer light；

Different exit ports are respectively synthesized with the second translation rear polarizer light of selected wavelength, is obtained in exit ports The emergent light of selected wavelength.

The polarised light consistent according to polarization state described in different wavelength separateds include：

Collimate the consistent polarised light of the polarization state；

According to the polarised light after different wave length separation collimation；

Polarised light after the separation is refracted as one group of parallel polarised light, is then converged on same plane.

A kind of optical routing device of selection wavelength, described device include：Input and output array, division module, dispersion compensation module, At least one light polarization modulator, at least one light beam translation piece, optically-active module and speculum；

Input and output array, the emergent light of the selected wavelength of incident light and output for receiving different wave length；

Division module, for by incident light extraordinary ray component and ordinary light component it is completely separable, obtain polarization state Consistent polarised light, and synthesize the polarised light that dispersion compensation module returns；

Dispersion compensation module is used for according to the consistent polarised light of polarization state described in different wavelength separateds, and selected by merging Different wave length polarised light；

Light polarization modulator, the polarization state for switching the polarised light after the separation；

Light beam translation piece, for converting variation of the polarised light in polarization state to changing on spatial position The polarised light of different wave length after to translation, and by the polarised light input polarization modulator of selected different wave length；

Optically-active module, the polarization state for rotating the polarised light of different wave length after the translation；

Speculum, the polarised light for reflecting different wave length；

The end face of input and output array is located in the outside focal plane of dispersion compensation module, and the outside of speculum and dispersion compensation module is burnt Plane overlaps.

The dispersion compensation module includes：

First lens, the incident polarized light consistent for collimating the polarization state, and convergence include selected different waves Focal plane on the outside of long outgoing polarization light to the first lens；

Diffraction grating, for according to the polarised light after different wave length separation collimation, and different wave length selected by merging Polarised light；

Second lens, for the polarised light of the different wave length after the separation to be refracted as one group of parallel polarised light, and The polarised light is converged on the outside of the second lens on focal plane；And the polarised light that will be reflected from focal plane on the outside of the second lens Collimation, and the polarised light after collimation is reflected to focus direction on the inside of the second lens；

The focal length of first lens is equal with the focal length of the second lens and the focus of inside overlaps, and the center of diffraction grating is located at The inside focus of first lens and the second lens.

The dispersion compensation module includes：

The third lens, the polarised light consistent for collimating the polarization state, and will be described in reflection-type diffraction grating output Polarised light after separation is refracted as one group of parallel polarised light, while the parallel polarised light is converged to the third lens respectively Left side focal plane；And will focal plane is reflected on the left of the third lens polarised light collimation, while by the polarization after the collimation Light is reflected to focus direction on the right side of the third lens, and the outgoing for including selected different wave length that reflection-type diffraction grating is merged Polarised light converges to focal plane on the left of the third lens；

Reflection-type diffraction grating, for selected different according to the polarised light after different wave length separation collimation, and merging The polarised light of wavelength；

The center of reflection-type diffraction grating is located at the right side focus of the third lens.

The dispersion compensation module includes：

Reflecting spherical mirror, the polarised light consistent for collimating the polarization state, and the institute that reflection-type diffraction grating is exported It states the polarised light after separation and is refracted as one group of parallel polarised light, while the parallel polarised light is converged into reflection sphere respectively Face mirror focal plane；And collimate the polarised light reflected from reflecting spherical mirror focal plane, while by the polarised light after the collimation The outgoing polarization for including selected different wave length for being reflected to reflecting spherical mirror focus direction, and reflection-type diffraction grating being merged Light converges to reflecting spherical mirror focal plane；

The center of reflection-type diffraction grating is located in the focus of reflecting spherical mirror.

The light polarization modulator is the first polarization modulator array, and the optically-active module is the second polarization modulator array；

First Polarization Modulation array carries out independent modulation to the polarization state of the polarised light of each wavelength；The light beam translation piece Light pass surface cover the first Polarization Modulation array all pixels；

Second Polarization Modulation array carries out independent modulation to the polarization state of the polarised light of each wavelength；The speculum it is anti- Penetrate all pixels that face covers the second Polarization Modulation array.

It can be seen that from above-mentioned technical proposal in embodiments of the present invention, by adding in the device of translation polarised light Enter the device that division module obtains control optical signal；Dispersion compensation module is further increased in the device of control optical signal to be selected The optical routing device of wavelength.Since above-mentioned technical proposal simplifies optical texture and realizes the micromation of device, can improve The optical signal quality of routing, while reducing the volume of route device.

Description of the drawings

Fig. 1 is the core architecture schematic diagram of traditional 1*2ROADM in the prior art；

Fig. 2 is the method flow schematic diagram for translating polarised light；

Fig. 3 is the apparatus structure schematic diagram for being translation polarised light；

Fig. 4 A are the sectional view and making alive V0 fundamental diagrams of liquid crystal switch unit 310；

Fig. 4 B are the sectional view and making alive V1 fundamental diagrams of liquid crystal switch unit 310；

Fig. 5 A are the operating diagram of 310 making alive V0 of switch unit；

Fig. 5 B are the operating diagram of 310 making alive V1 of switch unit；

Fig. 6 A are 4 optional output coordinate operating diagrams 1；

Fig. 6 B are 4 optional output coordinate operating diagrams 2；

Fig. 6 C are 4 optional output coordinate operating diagrams 3；

Fig. 6 D are 4 optional output coordinate operating diagrams 4；

The method flow schematic diagram of Fig. 7 optical signals in order to control；

The apparatus structure schematic diagram of Fig. 8 optical signals in order to control；

Fig. 9 A are the positive light splitting schematic diagram of division module 900；

Fig. 9 B are the reversed closing light schematic diagram of division module 900；

Fig. 9 C be division module 900 cannot normal reversed closing light schematic diagram；

Fig. 9 D are the operating diagram 4 of division module 900；

Figure 10 is the apparatus structure schematic diagram for the control optical signal that can adjust Output optical power；

Figure 11 is the optical routing method flow schematic diagram for selecting wavelength；

Figure 12 A are the optical routing device structural schematic diagram for selecting wavelength；

Figure 12 B are the optical routing device structural schematic diagram that 1*2 selects wavelength；

Figure 13 A are adjustable handover module array transversary schematic diagrames；

Figure 13 B are adjustable handover module array vertical structure schematic diagrames；

Figure 14 is the optical routing device structural schematic diagram for selecting wavelength；

Figure 15 is the optical routing device structural schematic diagram for selecting wavelength.

Specific implementation mode

To make the object, technical solutions and advantages of the present invention express to be more clearly understood, below in conjunction with the accompanying drawings and specifically The present invention is further described in more detail for embodiment.

In embodiments of the present invention, increase input and output array and division module on the basis of translating the device of polarised light Obtain the device of control optical signal；Increase dispersion compensation module on the basis of controlling the device of optical signal and obtains the light path of selection wavelength By device.

The device of translation polarised light not only may be implemented the accurate switching of polarised light, and can by light polarization modulator with The optical thickness of light beam translation piece neatly adjusts the amount of switched of polarised light.The device of control optical signal uses unique polarization Separation/combination designs, all to input extraordinary ray corresponding with output light after the translation of division module, complete with all ordinary lights It is fully separating, therefore the polarization state for only needing one group of wave plate that all light can be realized is consistent.The ordinary light of different port non-is sought It does not require then to be kept completely separate between ordinary light, hot spot can be overlapped without polarisation-affecting light when leaving polarization spectro crystal The extinction ratio of line.And above-mentioned technical proposal is used, greatly simplifie polarization optics structure, input and output port can be by It is spaced very small unitary fiber optic array to constitute, to realize the micromation for the device for controlling optical signal.Control optical signal Device is not only simple in structure to be easily assembled, and component is few small.Simultaneously because using mini optical fibre array as input and Output port, volume increase little with the increase of port number, it is achieved that high stability and reliability.

The optical routing device of selection wavelength proposed by the present invention is the 4F systems of classics, and feature is the sky on front and back focal plane Between the image of distance be 1：1.This feature combines the closely-spaced fiber array end that the device of the control optical signal of the present invention uses Mouthful, the optical thickness of translation polarized light device can be greatly reduced, is to improve the performance of optical system and reduce The package dimension of system.Another feature in 4F systems is the common coke that the corresponding light of all of the port all passes through two lens Point, that is, be the position of dispersion element diffraction grating.Therefore the size of diffraction grating needs be only greater than single hot spot herein Meet system requirements, to significantly reduce requirement of the system to the area of diffraction grating.Meanwhile after being converted by main lens Hot spot it is larger relative to the hot spot of independent collimator, the area shone on the diffraction grating is also corresponding larger, thus entire The diffraction resolution of optical system is also relatively high.

The technical solution that the invention will now be described in detail with reference to the accompanying drawings.

It is the method flow schematic diagram for translating polarised light referring to attached drawing 2, specifically includes following steps：

Step 201, the polarization state for switching polarised light, convert on spatial position variation of the polarised light in polarization state to Variation obtain the first translation rear polarizer light.

Switch the polarization state of polarised light, does not change the propagation path of polarised light.When the polarization state of polarised light changes, Then the variation by polarised light in polarization state is converted into the variation on spatial position, obtains the first translation rear polarizer light.Wherein, may be used To switch polarised light by changing driving voltage.

Step 202 translates rear polarizer light reflection by described first while being rotated by 90 ° the polarization state of polarised light.

Rear polarizer light reflection is translated by first, while the polarization state of polarised light being first rotated by 90 °.

Step 203 will rotate variation of the rear polarizer light in polarization state and be converted into the variation on propagation path and obtain the Two translation rear polarizer light.

Polarization state of the polarised light before step 202 has changed 90 degree with polarization state of the polarised light after step 202, this is partially The variation of polarization state translates into variation of the polarised light before step 202 and after step 202 on propagation path, to obtain second Translate rear polarizer light.

It is the apparatus structure schematic diagram for translating polarised light referring to attached drawing 3, specifically：

Device, that is, handover module 300 of polarised light is translated by several switch units 310 and 320 groups of a reflector element At.Wherein each switch unit 310 is made of a light polarization modulator 311 and a light beam translation piece 312.Light polarization modulator 311 function is to switch the polarization state of incident light, but it does not change the propagation path of incident light.Switch unit 310 is to entering The translation for penetrating light is completed by light beam translation piece 312 therein.Light beam translation piece 312 is made of single axial birefringence crystal Parallel flat, characteristic are that the polarization state of incident light determines whether translated when its outgoing.Reflector element 320 is then revolved by one Mating plate 321 and speculum 322 form, and function is to reflect incident polarised light along original route, while by its polarization state It is rotated by 90 °.Optical rotation plate 321 therein is 45 degree of Faraday rotation piece, and polarization state rotates 45 degree and then reflects, then will be anti- The polarization state for penetrating light rotates 45 degree again.Optical rotation plate 321 is the quarter-wave plate made of birefringece crystal, and polarised light is by anti- After penetrating mirror reflection, polarization state is rotated by 90 °.

Light polarization modulator 311 can be modulated the polarization state of incident polarised light according to external drive signal, can be with Realize that the technology of this function includes liquid crystal technology, electrooptical technology and magneto-optic technology etc..Light beam translation piece 312 is by uniaxial double Parallel flat made of refracting crystal can convert variation of the polarised light in polarization state to the variation on spatial position, Namely polarised light can be made to be translated when polarization state changes.The material that light beam translation piece can be made includes but not limited to Yttrium Orthovanadate (YVO4) crystal, lithium columbate crystal and calcite crystal.

Polarised light is incident on handover module 300 along Z axis positive direction, by each switch unit 310 translation switching and After the reflection of reflector element 320, it will be emitted along Z axis negative direction, and the Y axis coordinate of emergent light is different from incident light, i.e., relatively A translation is produced in incident light.If the number of switch unit 310 is N, the Y axis coordinate of emergent light just has 2^NKind choosing It selects.These Y axis coordinates are determined by the translational movement of each light beam translation piece 312, and select to be exported by which Y axis coordinate, then are passed through The state of each light polarization modulator 311 is controlled to realize.

Below by taking the handover module based on liquid crystal technology as an example, its concrete operating principle is illustrated.Attached drawing 4A switches for liquid crystal The sectional view and its fundamental diagram of unit 310, wherein light polarization modulator 311 are liquid crystal cell, mainly by layer glass substrate 401, two layers of the transparent electrode 403 of liquid crystal layer 402 and plating on the glass substrate is constituted.Liquid crystal layer 402 is clipped in two layers of transparent electricity Between pole 403, external drive voltage can be applied to by transparent electrode 403 on liquid crystal layer 402.

Liquid crystal is a kind of condensed state matter, and structure and characteristic are to have between solid crystals and isotropic liquid The fluid of sequence.The chemical constitution of liquid crystal is asymmetric, therefore its dielectric property and optical characteristics are also asymmetric, are had With the birefringent characteristic as crystal.If the thickness of liquid crystal layer 402 be d, optical axis in X-Y plane and with Y-axis at 45 degree, it is ordinary The refringence of light (O light) and extraordinary ray (E light) is Δ n, then it is to bit phase delay δ caused by incident light

δ=Δ nd

When δ is equal to incident wavelength λ or its integral multiple, liquid crystal layer 402 is equivalent to the full-wave plate of incident light, and incident light passes through Polarization state does not change after it.And when δ be equal to λ/2 or its odd-multiple when, liquid crystal layer 402 be equivalent to incident light two/ Polarization state can be carried out 90 degree of rotations by one wave plate perpendicular or parallel to the polarization state of the incident light of Y-Z plane.

When liquid crystal layer 402 is applied in electric field, the orientation of molecule can change, corresponding birefringent characteristic Namely refractive indices n is also changed correspondingly, and forms electrically conerolled birefringence (ECB) effect.Therefore, the electrically conerolled birefringence of liquid crystal is utilized Effect can change its phase delay of δ to incident polarized light, to realize to light by changing the driving voltage of liquid crystal cell Polarization state modulation.

If δ is equal to λ and λ/2, corresponding driving voltage is respectively V0 and V1, then light polarization modulator 311 is to polarization state Modulation is respectively as shown in attached drawing 4A and attached drawing 4B.In Figure 4 A, polarization state (is indicated) perpendicular to Y-Z plane with the dot on light Incident light by driving voltage be V0 light polarization modulator 311 after, polarization state remains unchanged.And in figure 4b, it is same inclined For the incident light of polarization state after the light polarization modulator 311 for being V1 by driving voltage, polarization state becomes being parallel to Y-Z plane (with light Small horizontal line on line indicates), i.e., have rotated 90 degree relative to incoming polarization state.

In addition to ecb mode, liquid crystal can also be in other multiple-working modes, including twisted nematic (TN) and super distortion Above-mentioned polarization state modulation function is realized under nematic (STN) isotype.The detailed operation principle of liquid crystal is not belonging to the present invention's Content is not stated herein tired.

Light beam translation piece 412 in Fig. 4 is by taking yttrium vanadate crystal as an example, and thickness T, the optical axis of crystal 404 is in Y-Z plane And with the surface of crystal at the angles a.When the driving voltage of light polarization modulator 311 is V0, incident light is after light polarization modulator 311 Polarization state does not change, thus when being incident on light beam translation piece 312 polarization state still perpendicular to the Y-Z plane where its optical axis 404, As shown in Figure 4 A.In this case, incident light is reflected in light beam translation piece 312 by the law of refraction of ordinary light, so in Y It does not shift in axis direction, with incident light on same straight line, Y axis coordinate does not change emergent light.

And when the driving voltage of light polarization modulator 311 is V1, incident light retrodeviates polarization state by light polarization modulator 311 and is revolved Turn 90 degree, becomes the linearly polarized light for being parallel to Y-Z plane, as shown in Figure 4 B.In this case, the polarization state of incident light is flat Row presses extraordinary in the main cross section (plane i.e. where optical axis 404) of light beam translation piece 312 in light beam translation piece 312 The law of refraction of light reflects, and shifts in the Y-axis direction, offset direction is consistent with the direction of optical axis 404, i.e. Y-axis positive direction. Final emergent light is not arranged on the same straight line with incident light, but parallel at two, and distance is on the straight line of d.

That is, incident light is shifted d distances by light beam translation piece in Y-Z plane along Y-axis, if the Y of incident light Axial coordinate is 0, then the Y axis coordinate of emergent light is+d.Light beam translation piece translation distance d by crystal thickness T and optical axis direction a It determines, suitable crystal thickness T and optical axis direction a is selected according to the characteristic of crystal, you can obtain required translation distance d.

Below by taking the handover module (as shown in Fig. 5) of the switch unit 310 above-mentioned comprising one as an example, illustrate to switch mould The detailed course of work of block.

See attached drawing 5A, perpendicular to Y-Z plane, the polarised light that Y axis coordinate is 0 is incident on a branch of polarization state along Z axis positive direction Switch unit 310.When driving voltage is V0, retrodeviates polarization state by switch unit 310 and do not change, Y axis coordinate does not have yet Change, continues to enter reflector element 320 along Z axis positive direction.Optical rotation plate 321 in reflector element 320 be incident light four/ One wave plate, optical axis is interior in X-Y plane (perpendicular to Y-Z plane), and with Y-axis at 45 degree of angles.Polarised light passes through optical rotation plate 321 It is reflected afterwards by speculum 322, the direction of propagation becomes Z axis negative direction, then again passes by optical rotation plate 321 along original route.Polarised light It is equivalent to twice by the effect of quarter-wave plate and have passed through a half wave plate, and the optical axis of wave plate and its polarization state At 45 degree of angles, therefore polarised light retrodeviates polarization state through the reflection of reflector element 320 and has rotated 90 degree, becomes being parallel to Y-Z plane, and passes It broadcasts direction and then becomes Z axis negative direction.

When polarised light continuation is again incident on switch unit 310 along Z axis negative direction, what is initially entered is light beam translation piece 312, its polarization state, which has turned into, at this time is parallel to Y-Z plane (i.e. the main cross section of light beam translation piece 112), therefore in light beam translation piece It reflects by the law of refraction of extraordinary ray in 312, shifts in the Y-axis direction.Simultaneously as incident direction is Z axis losing side To so offset direction is Y-axis negative direction.If the translation distance of light beam translation piece 312 is d, the Y-axis for the polarised light being emitted Coordinate is-d.Polarised light finally again passes by light polarization modulator 311, and since driving voltage is V0, polarization state does not change, most The polarization state of whole emergent light is to be parallel to Y-Z plane.

Attached drawing 5B is shown when the driving voltage of light polarization modulator 311 is V1, the operation principle of handover module.It is identical Incident light is being translated distance d after switch unit 310, and the Y axis coordinate being emitted from light beam translation piece 312 is+d.Meanwhile Its polarization state is rotated by 90 degree, becomes being parallel to Y-Z plane.Polarised light continues after the outgoing of switch unit 310 along Z axis pros To reflector element 320 is incident on, the direction of propagation becomes for Z axis negative direction after the reflection of reflector element 320, and polarization state is again It is secondary to be rotated by 90 degrees, become perpendicular to Y-Z plane.Therefore, when polarised light is again introduced into light beam translation piece 312 along Z axis negative direction When, it will reflect, do not shift in the Y-axis direction, the Y axis coordinate of emergent light remains as+d by the law of refraction of ordinary light.Most Rear polarizer light again passes by light polarization modulator 311, and since driving voltage is V1, polarization state third time is rotated by 90 degrees, finally Emergent light polarization state be parallel to Y-Z plane.

In conclusion+d and two output coordinates of-d may be selected (it is assumed that input in the handover module comprising a switch unit The coordinate of light is that 0), output coordinate can be by the driving voltage of the light polarization modulator in control switch unit, that is, modulates State selects.The corresponding driving voltages of coordinate-d are V0, that is, the not modulation condition of rotatory polarization state, in this case partially When the translation of light of shaking is happened at it and is propagated along Z axis negative direction, therefore the direction translated is Y-axis negative direction, and output coordinate is-d, such as Shown in attached drawing 5A.And the corresponding driving voltages of coordinate+d are V1, that is, modulation condition that polarization state is rotated by 90 °, this feelings When the translation of polarised light is happened at it and is propagated along Z axis positive direction under condition, therefore the direction translated is Y-axis positive direction, output coordinate For+d, as shown in fig. 5b.

In the more common scenario, handover module as shown in Fig. 3 includes multiple switch units.And for including multiple switchings Any one switch unit in the handover module (hereinafter referred to as multiple-unit handover module) of unit, is not difficult to illustrate polarised light along Z Axis positive direction leaves this switch unit to 90 degree of the polarization state during returning to this switch unit along Z axis negative direction, undergone The number (90 degree of rotations for including reflector element) of rotation must be odd number.That is, polarised light is returning to this switching list When first, polarization state and when leaving centainly at 90 degree.Therefore, polarised light is in the light beam translation for passing through each switch unit twice back and forth When piece, it must occur once and only once translate.If translation is happened at it and is propagated along Z axis positive direction, translate Direction is Y-axis positive direction.If translation is happened at it and is propagated along Z axis negative direction, the direction translated is Y-axis negative direction.And By the modulation condition for controlling the light polarization modulator of this switch unit, so that it may to select polarised light to be propagated along Z axis positive direction Shi Pingyi, or translated when being propagated along Z axis negative direction, that is, the translation direction of polarised light can be selected.

Therefore it may be concluded that each switch unit in multiple-unit handover module can put down incident light It moves, and the summation for the translational movement that the translational movement of final emergent light is all switch units.Each switch unit puts down polarised light Shifting is all independent, therefore its position in handover module, that is, sequencing do not influence the translational movement of final emergent light. Since each switch unit has both positive and negative translation direction, so if the quantity for the switch unit that handover module includes is N, and And if translational movement is different, then the Y axis coordinate of emergent light just has most 2^NKind selection.By controlling each switch unit Driving voltage, that is, each switch unit translation direction, you can select the Y axis coordinate of emergent light.

According to conclusions, the handover module of arbitrary output port quantity and output coordinate can be designed.Below with one 4 output coordinates may be selected, and for outputting and inputting the handover module that coordinate is arranged by equidistant d, is described in detail.

First, to meet 4 optional output coordinates and then at least need two switch units.And input in order to obtain with it is defeated Go out coordinate equidistantly to arrange, the result of the arbitrary plus-minus combination of the translation distance of two switch units is necessary for the integral multiple of d.Root The handover module obtained according to these requirements is as shown in Fig. 6 A, 6B, 6C, 6D, and along Z axis positive direction sequential, there are two switch units 610 and 620 and reflector element 320.The translation distance of the light beam translation piece 612 and 622 of two switch units separately design for 1.5d and 0.5d, to achieve the effect that equidistantly to export.

The detailed operation and state of a control of handover module and corresponding output result are as shown in Table 1, under four states The specific path of light is seen shown in Fig. 6 A~Fig. 6 D.In the case where the Y axis coordinate of input light is 0, four output coordinate difference For -2d,-d ,+d and+2d, equidistantly distributed is just pressed in the both sides of input coordinate, and each output coordinate and switch unit Four kinds of driving voltages combination correspond.

Table one

It should be noted that in multiple-unit handover module, the driving voltage of switch unit and its translation direction (positive or negative) Although one-to-one, its correspondence is not fixed, and the same driving voltage is right under different switching states What is answered may be opposite translation direction.Such as in switching state 3 switch unit 620 the corresponding translation directions of driving voltage V1 It is Y-axis negative direction rather than positive direction.This is because polarization state when polarised light reaches switch unit 620 for the first time is to be parallel to Y-Z plane, rather than perpendicular to Y-Z plane.Therefore judge that the basis of translation direction is propagation of the polarised light when translating Direction, occur when being propagated along Z axis positive direction translation be exactly it is positive, it is on the contrary then be negative direction.Similarly, if the polarization state of input light Y-Z plane is parallel to perpendicular to Y-Z plane, handover module is still effective to its translation switching, and output end The quantity and coordinate of mouth are all constant, and the only combination of the driving voltage corresponding to each output coordinate has difference.

In addition, the above light beam translation piece translation direction and the direction of propagation relationship (i.e. polarised light along Z axis positive direction pass The translation that sowing time occurs be just, it is on the contrary then be negative) be based on light beam translation piece by yttrium vanadate crystal, that is, single shaft positive crystal It is made, and its optical axis direction is attached shown in Fig. 4 under the premise of this.If light beam translation piece by negative uniaxial crystal system at, Or the optical axis direction of its crystal it is opposite with shown in Fig. 4 it is (symmetrical with Z axis) if, then polarised light along Z axis positive direction propagate The translation of Shi Fasheng is born, on the contrary then be positive.Principle related to this is the basic theories of crystal optics, herein no longer in detail It states.

It analyzes one again below and 8 output coordinates may be selected, and output and input the switching that coordinate is arranged by equidistant d The operation principle of module, parameter and working condition are as shown in Table 2.Because of 8=2³, so the switching that handover module is included There are three units, and the translation distance of light beam translation piece is respectively 2.5d, 1.0d and 0.5d (can arrange in any order), with Achieve the effect that equidistantly to export.

In the case where the Y axis coordinate of input light is 0,8 output coordinates respectively -4d, -3d, -2d,-d ,+d ,+2d ,+ 3d and+4d just presses equidistantly distributed in the both sides of input coordinate.The group of the translation direction of each output coordinate and switch unit It closes and corresponds, and the combination of each translation direction must also correspond to the combination of fixed driving voltage, correspondence is by entering The concrete structure of the polarization state and handover module of penetrating light determines, is not repeated herein.

Table two

According to above-mentioned technical proposal, it may be determined that more output coordinates include the handover module of more switch units. And the output coordinate of each handover module can be adjusted by changing the translational movement of each switch unit, to meet reality The needs of application.

The device of translation polarised light discussed above switches over the fixed linearly polarized light of polarization state, and common Optical fiber in the polarization state of light propagated be it is random, it is unfixed.Therefore, using optical fiber as the control of input/output end port Device of the device of optical signal in addition to including above translation polarised light, it is necessary to have division module.The function of division module It is that the random input light of polarization state is divided into two fixed components of polarization state, allows the device of translation polarised light to the two Component switches over, and two components are reconsolidated output after the completion of switching.

It is the method flow schematic diagram for controlling optical signal referring to attached drawing 7, specifically includes following steps：

Step 701, the extraordinary ray component being kept completely separate in incident light and ordinary light component, the polarization after being detached Light.

The extraordinary ray component and ordinary light component being wherein kept completely separate in incident light include two ways：

Mode one：

Mode two：

The polarization state of polarised light after step 702, switching separation, converts variation of the polarised light in polarization state to Variation on spatial position obtains the first translation rear polarizer light.

Switch the polarization state of polarised light, does not change the propagation path of incident light.When the polarization state of polarised light changes, Then the variation by polarised light in polarization state is converted into the variation on spatial position, obtains the first translation rear polarizer light.Wherein, may be used To switch polarised light by changing driving voltage.

Step 703 translates rear polarizer light reflection by described first while being rotated by 90 ° the polarization state of polarised light.

The polarization state of polarised light is rotated by 90 ° by the polarization light reflection after first translation simultaneously.

Step 704 will rotate variation of the rear polarizer light in polarization state and be converted into the variation on propagation path and obtain the Two translation rear polarizer light, the synthesis second translation rear polarizer light are simultaneously emitted.

Polarization state of the polarised light before step 703 has changed 90 degree with polarization state of the polarised light after step 703, this is partially The variation of polarization state translates into variation of the polarised light before step 703 and after step 703 on propagation path, to obtain second Rear polarizer light is translated, the synthesis second translation rear polarizer light is simultaneously emitted.

As shown in Fig. 8, by taking a 1*2 controls the device of optical signal as an example, the device of analysis and Control optical signal.Control light The device of signal includes：The device 300 of input and output array 800, division module 900 and translation polarised light is along Z axis positive direction It is ranked sequentially composition.Wherein input and output array 800 is made of fiber array 810 and microlens array 820, and its spacing is all d And along Y direction close-packed arrays, and fiber port and lenticule correspond.Port among array is input port, if Its Y axis coordinate is 0, and two output ports are then symmetrically distributed in the both sides of input terminal, corresponding Y axis coordinate be respectively+d and- d。

The random polarised light of polarization state is entered by input optical fibre, after being collimated by corresponding lenticule, is incident on division module 900.Incident polarised light will be separated into two polarization states all perpendicular to Y-Z plane by polarization division module 900 along Y direction Component, subsequently into the device 300 of translation polarised light.Because the quantity of output port is 2, the device of polarised light is translated 300 include a switch unit, and its translation distance is d.

That is, the device 300 of translation polarised light is there are two types of switching state, respectively by input light along Y-axis positive direction and Negative direction translation distance d, and it is identical to the panning effect of two components of incident polarized light.Switch shape in former Under state, two components of incident polarized light by the same time along Y-axis positive direction translation distance d, and polarization state be rotated into it is parallel It is shown in solid in Y-Z plane, then along Z axis negative direction return division optical module 900, opticpath such as attached drawing 8.Due to inclined at this time Two components of light of shaking all are shifted distance d along Y-axis positive direction, thus they merged by division module 900 after Y axis coordinate For+d, the output port 1 in input and output array 800 is just corresponded to, is exported to be converged in optical fiber 1 by lenticule.And Under latter switching state, two components of incident polarized light by the same time along Y-axis negative direction translation distance d, through division module Y axis coordinate after 900 merging is-d, corresponding with the output port 2 in input and output array 800, so being converged to by lenticule It is exported in optical fiber 2, in specific opticpath such as attached drawing 8 shown in dotted line.Therefore, the switching of the device of polarised light is translated by selection State, that is, driving voltage, so that it may to realize the selection of optical output port.

Use by all of the port it is corresponding it is non-seek light component and ordinary light component is kept completely separate, then to two components point The structure not switched over.This structure does not require ordinary light corresponding to different port or extraordinary ray to be kept completely separate, by revolving Light device realizes that the polarization state of all light is consistent, and relative to traditional pectination polarization spectro/closing light structure, i.e. a port corresponds to The structure of one group of optical rotation plate, which has, to be greatly simplified.Meanwhile this structure can use the very small input/output end port battle array of spacing The optics of the device of control optical signal greatly improved to greatly reduce the optical thickness and size of handover module in row Performance.

Division module 900 is described in detail in 9A, 9B, 9C and 9D below in conjunction with the accompanying drawings.

Attached drawing 9 is the operating diagram of division module 900.It includes uniaxial crystal 901 along Z axis positive direction sequence, herein By taking yttrium vanadate crystal is uniaxial positive crystal as an example, optical axis direction is shown in 902.Uniaxial crystal function is that polarization state is random Input light is divided into two bundles the orthogonal polarised light of polarization state, or the orthogonal polarization photosynthesis of two beam polarization states is a branch of Polarised light.Reversible optical rotation plate includes 903 and 904, is the half wave plate of the incident light made of crystal, and function is by phase Mutually the polarization state of two vertical beam polarised lights rotates consistent to polarization direction respectively, and all with Y-axis at 45 degree, and this rotation It is reversible.Irreversible optical rotation plate 905 for yttrium iron garnet or mixes bismuth thin film crystal, magneto-optic effect can be relied on polarised light Polarization state carries out 45 degree, and direction of rotation is fixed, and the direction of polarization light propagation is unrelated, therefore this rotation is irreversible 's.

The positive spectroscopic processes of division module are as shown in figure 9.

The random polarised light of a branch of polarization state (be equivalent to perpendicular to Y-Z plane component and be parallel to two of Y-Z plane Component, respectively by light point and small horizontal line indicate) after Z axis positive direction is incident on uniaxial crystal 901, two components difference It is reflected by the law of refraction of ordinary light and extraordinary ray, is emitted latter two component and is separated along Y direction, separated distance is by list The thickness and optical axis direction of axialite body 901 determine.Position and its polarization state of the polarised light after each optical element are shown in figure In a series of boxes of lower section, position is indicated by small circle, and polarization state is indicated by the small horizontal line in circle, direction of observation Z Axis positive direction.

It can be seen that two polarized light components are mutually perpendicular to leaving uniaxial crystal 901 and retrodeviate polarization state, it is then incident reversible respectively Optical rotation plate 903 and 904, and rotated 45 degree respectively by different directions.Therefore, two polarized light components have passed through reversible optically-active Piece, which retrodeviates polarization state and becomes, to be mutually parallel, and all with Y-axis at positive 45 degree (set from Y-axis positive direction and clockwise turn to just, it is on the contrary It is negative).Finally, two polarized light components pass through irreversible optical rotation plate 905, and polarization state is rotated again 45 degree, and direction of rotation is Clockwise, the polarization state of final emergent light is perpendicular to Y-Z plane.

The quantity of reversible optical rotation plate contained by division module is not more than two, corresponds to all input/output ports respectively in list Extraordinary ray component in axialite body 901 and extraordinary ray component.The two reversible optical rotation plates are by the orthogonal of input light Extraordinary ray component and the polarization state of extraordinary ray component are rotated to consistent, while by the consistent extraordinary ray of the polarization state of return Component and extraordinary ray component are rotated to being mutually perpendicular to.Use a pair of reversible optically-active respectively with traditional each input/output port The characteristics of method that piece carries out pectination division light is compared, this technical solution is that fixed two reversible optical rotation plates are used only, number Amount just corresponds to the reversible optical rotation plate in traditional pectination point light combination method needed for a port.Importantly, using this skill I.e. only use two reversible optical rotation plates may be implemented the minimum of input/output port spacing to art scheme, and then realize control light The micromation of the device of signal.

It is fixed in conclusion the polarised light of incident random polarization state is divided into two beam polarization states by division module, and All perpendicular to the component of Y-Z plane, the distance between two components can be selected by uniaxial crystal 901.

The reversed closing light process of division module 900 is as shown in figure 9b.

Device 300 reflection of two polarized light components through translation polarised light retrodeviates polarization state and is rotated by 90 °, and becomes being parallel to Y-Z Plane returns to irreversible optical rotation plate 905 along Z axis negative direction.It is solid because its optical direction is unrelated with the direction of propagation of polarised light Fixed clockwise direction becomes with Y-axis so the polarization state of two polarized light components is rotated clockwise 45 degree into positive 45 degree, It is consistent with the polarization state of corresponding position in spectroscopic processes.And due to reversible optical rotation plate 903 and 904 and uniaxial crystal 901 to inclined The effect of light of shaking all is reversible, thus two polarized light components will be reconsolidated by the path being divided originally it is a branch of it is arbitrary partially The polarised light of polarization state.

If the polarization state for returning to two polarized light components of irreversible optical rotation plate 905 along Z axis negative direction is not parallel to Y-Z plane, and be if the Y-Z plane, then they are by irreversible optical rotation plate 905 after rotating clockwise 45 degree, It will become with Y-axis into the polarization state of corresponding position in minus 45 degree and spectroscopic processes at 90 degree, as shown in figure 9 c.In this feelings Under condition, reversible optical rotation plate 503 and 504 will be rotated into the polarization state of two polarized light components perpendicular to Y-Z plane peace respectively Row is opposite with the polarization state of corresponding position in spectroscopic processes in Y-Z plane, and respectively.That is, in polarization point when light splitting With extraordinary ray when will become reflecting by extraordinary ray with the component of ordinary light rule refraction in light/closing light crystal 901, and be divided The component of rule refraction will become by ordinary anaclasis.Therefore, two polarized light components will be further divided and cannot merge For a branch of polarised light.

Since refractive index of two components in uniaxial crystal 901 of polarised light is different (i.e. spread speed difference), and The length of propagation path is also different, results in two components in follow-up each nonsynchronous phenomenon of optical interface, i.e. polarization mode color It dissipates.In order to remove polarization mode dispersion, the first uniaxial crystal 906 and second as shown in attached drawing 9D may be used in practical applications Uniaxial crystal 909, and the combination of the first reversible optical rotation plate 908 that is placed among the two replace uniaxial crystal 901.First is single The spectroscopic distance of axialite body 906 and the second uniaxial crystal 909 is the half of uniaxial crystal 901, and its optical axis 907 and 910 Direction is opposite (symmetrical with Z axis).First reversible optical rotation plate 908 is half wave plate, and optical axis is in X-Y plane, and and Y Axis is at 45 degree.

When random polarization state polarised light along Z axis positive direction be incident on the first uniaxial crystal 906 after be divided into two components, Wherein ordinary light component does not translate, and extraordinary ray component is translated along Y-axis negative direction, and translation distance is uniaxial crystal 901 half.Pass through half wave plate 908 with latter two component, polarization state is all rotated by 90 degrees, therefore it is uniaxial to enter second Original ordinary light component becomes extraordinary ray component after crystal 909, is translated along Y-axis positive direction, and translation distance is similarly single The half of axialite body 901.And original extraordinary ray component becomes ordinary light component, does not translate.Two be finally emitted It is just the same when the polarization state of a polarized light component and separated distance and the single uniaxial crystal 901 of use.But due to every A component all experienced primary ordinary anaclasis and an extraordinary ray refraction, and the complete phase of length of corresponding propagation path Together, therefore two components will be emitted from the second uniaxial crystal 909 simultaneously, and polarization mode dispersion is not present.

Certain application scenarios, it is desirable that the device for controlling optical signal will not only have the selection function of output port, also want energy It is enough that the power of output light is adjusted.In this case, it need to only be changed into optical rotation plate is fixed in the device for translating polarised light This function can be realized in one light polarization modulator, (still by taking 1*2 photoswitches as an example) as shown in Fig. 10.

Phase delay of δ caused by light polarization modulator 1011 determines by driving voltage V, when phase delay of δ be equal to λ/2 or its When integral multiple, polarised light is equivalent to by light polarization modulator 1011 by a full-wave plate twice, and polarization state will remain unchanged. Therefore, the effect of the reflector element being made of light polarization modulator 1011 and speculum 1022 at this time is only anti-along former road by incident light It penetrates, without changing its polarization state.So the switching state regardless of switch unit 310, two components of polarised light all can edge Incident path backtracking, as shown in solid line in figure and dotted line light path.That is, handover module will not put down incident light It moves, the Y axis coordinate of emergent light is still 0, and the polarization state of emergent light is identical with incident light, for perpendicular to Y-Z plane.

By front to division module 900 analysis it is found that if along Z axis negative direction incidence two polarized light components it is inclined Polarization state be if the Y-Z plane, then they will be further divided and cannot merge into a branch of polarised light.Therefore, Any output port cannot be arrived at from reflected two polarized light components of device of translation polarised light, all output ports Output optical power is all zero, as shown in Fig. 10.And the phase delay of δ caused by the light polarization modulator 1011 be equal to λ/4 or its Constantly, light polarization modulator 1011 is fully equivalent in fixed optical rotation plate 321, the course of work and the attached drawing 8 of this light switch for odd-multiple Identical, input light will be exported from 310 selected output port of switch unit.

When the phase delay caused by the light polarization modulator 1011 is between both of the above, each polarized light component is anti- After penetrating and two subcomponents can be further divided into, the polarization state of one of subcomponent is rotated by 90 degree, and another is sub The polarization state of component does not change.Two subcomponents that polarization state is rotated by 90 degree will be propagated by the opticpath in attached drawing 8, Finally from the selected output port output of the device of control optical signal.And two subcomponents that polarization state does not change then according to Opticpath in attached drawing 10 is propagated, and cannot finally reach any output port, i.e., its energy loss is fallen.

Since the general power of input light is equal to the summation of all subcomponent power, and phase caused by light polarization modulator 1011 Position retardation determines the power of the different subcomponents proportion in general power, therefore can be controlled by controlling driving voltage V Output optical power processed ratio shared in input optical power, to realize the control to Output optical power.Before being different from The module 1000 being made of light polarization modulator 1011 and speculum 1022 is known as power by the device 300 for the translation polarised light stated Adjustable handover module, referred to as adjustable handover module.

It should be pointed out that the control of Output optical power is independently performed by light polarization modulator 1011, this function with The device translation functions for controlling optical signal are relatively independent, and the selection of output port in the device of control optical signal still by respectively switching The switching state of unit determines.In addition, phase delay produced by light polarization modulator 1011 grows to half from quarter-wave Wavelength is continuously adjustable, so Output optical power ratio shared in input optical power is also to be continuously adjusted from zero to 100%.

The device of the control optical signal of 1*4 provided by the invention, 1*8 and more output ports constitute and operation principle and The device of above-mentioned 1*2 controls optical signal is identical, only the scale of input/output end port array and the switch unit for being included Quantity it is different, be not repeated herein.

In addition, inference of being not difficult, the device of all control optical signals provided by the invention not only can be by 1*N (i.e. 1 input Port, N number of output port) configuration use, it can also configure and use by N*1 (i.e. N number of input port, 1 output port), it is defeated Enter/selection of output port carries out by the above process, it is not repeated herein.

It is the optical routing method for selecting wavelength referring to attached drawing 11, specifically includes following steps：

Step 1101, by incident light extraordinary ray component and ordinary light component it is completely separable, obtain polarization state it is consistent Polarised light.

Mode one：

Mode two：

Step 1102, according to the consistent polarised light of polarization state described in different wavelength separateds.

Collimate the consistent polarised light of the polarization state；

Polarised light after the separation is refracted as one group of parallel incident light, is then converged on same plane.

Step 1103, the polarization state for switching the polarised light respectively convert variation of the polarised light in polarization state The first translation rear polarizer light is obtained for the variation on spatial position.

The polarization state for switching polarised light respectively, does not change the propagation path of incident light.When the polarization state of polarised light occurs Variation, the then variation by polarised light in polarization state are converted into the variation on spatial position, obtain the first translation rear polarizer light.Its In, polarised light can be switched by changing driving voltage.

Step 1104 translates rear polarizer light reflection by described first while being rotated by 90 ° the polarization state of polarised light.

Step 1105 will rotate variation of the rear polarizer light in polarization state and be converted into the variation on propagation path and obtain the Two translation rear polarizer light.

Polarization state of the polarised light before step 1104 has changed 90 degree with polarization state of the polarised light after step 1104, this The variation of polarization state translates into variation of the polarised light before step 1104 and after step 1104 on propagation path, to obtain Second translation rear polarizer light.

Step 1106, the second translation rear polarizer light that different exit ports are respectively synthesized with selected wavelength, are going out It penetrates port and obtains the emergent light of selected wavelength.

On the basis of the device of control optical signal provided by the invention, increase dispersion compensation module 1200, to build selection wave Long optical routing device, as shown in attached drawing 12A.The optical routing device of the selection wavelength of one port 1*N is along Z-direction by inputting Output array 800, division module 900, dispersion compensation module 1200 and adjustable handover module array 12700 rearrange.

Wherein dispersion compensation module 1200 is arranged by the first lens 1210 and the second lens 1220 and diffraction grating 1230 along Z axis Row are constituted.The optical axis coincidence of first lens 1210 and the second lens 1220 and it is parallel to Z axis, X axis coordinate and inputted defeated It is consistent to go out array 800.Meanwhile the focal length of two lens is equal and focus on the inside of it overlaps.Diffraction grating 1230 is placed in two Between person, and the center is in the common focal point of two lens, i.e. the 1230 to the first lens of diffraction grating 1210 and second The distance of lens 1220 is equal to the focal length of lens.Input and output array 800 includes 1 input port and N number of output port, and And its end face is overlapped with the outside focal plane of the first lens 1210.And adjustable handover module array 12700 by with incoming wave long number The equal adjustable handover module of amount (being assumed to be m) arranges in X-Z plane along X-direction, each adjustable handover module The number of output coordinate is N, and the interval of output coordinate is consistent with input and output array 800.The Z of all adjustable handover modules Axial coordinate is identical, and its speculum is overlapped with the outside focal plane of the second lens 1220, to constitute a 4F optical system System, i.e., from object plane (optical port) to the optical system that the optical distance of image planes (speculum) is 4 focal lengths, as shown in the figure.

One feature of 4F systems is that the distance in its object plane and image planes is 1：1 image, if by the incidence on object plane Light translates certain distance, then its emergent light in image planes can also move same distance, and vice versa.

The wavelength of the optical signal transmitted in wavelength-division multiplex system and its interval are fixed, the light in a specific band In the frequency spectrum of signal such as attached drawing 12A shown in the frequency spectrum of input terminal.Wherein each cylindricality represents a wavelength signals, width generation Its bandwidth of table, and its height represents its watt level.Input signal includes m wavelength signals λ 1~λ m, and power is different. These optical signals input ports 800 enter, and are divided into two polarised lights point along Y direction in Y-Z plane by division module 900 Amount.Since the viewing surface of attached drawing 12A is X-Z plane, two polarized light components of each wavelength are in entire communication process All it is to overlap, is indicated with a light, referred to as the light beam of the wavelength.The light beam of all wavelengths then passes through the first lens 1210, after further collimator and extender, it is incident on diffraction grating 1230.

Diffraction grating is a kind of very strong optical element of dispersive power, can the incident light of different wave length be pressed different angles Degree carries out diffraction, to detach the light beam of different wave length in space.Since the diffraction surfaces of diffraction grating 1230 are flat for X-Z Face, and its point diffraction is in the focal point of the second lens 1220, therefore the light beam of different wave length is diffracted 1230 diffraction of grating Although the direction propagated afterwards is different, can all be reflected at parallel with Z axis by the second subsequent lens 1220.Meanwhile the Two lens 1220 can converge to all collimated light beams on its focal plane, so different wave length on the focal plane on the right side of it Light beam is completely segregated and is arranged along X-direction, and the light beam of each wavelength corresponds to an X axis coordinate, as shown in attached drawing 12A. And adjustable handover module array 12700 is then according to these X axis coordinate sequentials on the right side focal plane of the second lens 1220, Each is adjustable handover module corresponds to a wavelength (1~λ m of λ), to the light beam of the wavelength carry out independent translation switch with And the proportion adjustment of output power.

After the light beam of each wavelength and is reflected at corresponding adjustable handover module translation, dispersion is returned along Z axis negative direction Module 1200.Because translation is completed in Y-Z plane, the X axis coordinate of light beam does not all change, in X-Z plane Still it is returned along original route.And for dispersion compensation module 1200, the dispersion spectroscopic processes in X-Z plane are completely reversibilities , therefore the light beam of all wavelengths is reconsolidated in X-Z plane as light beam.And in Y-Z plane, the two of each wavelength A polarized light component is further merged into light beam by subsequent division module 900, is then return to input and output array 800.This When, although the light beam of different wave length overlaps in X-Z plane, its Y axis coordinate in Y-Z plane is different.It is adjustable Handover module array 12700 has carried out independent translation in Y-Z plane to the light beam of each wavelength, these translational movements are by 4F systems System 1：1 has been mapped to input and output array 1200.Therefore, the output Y axis coordinate of the light beam of each wavelength, that is, its output end Mouth is selected by corresponding adjustable handover module.Meanwhile because 4F systems do not change the polarization state of polarised light, adjustable switching Module can insusceptibly be transmitted to division module 900 to the adjusting of the power proportions of polarized light component, to realize output work The regulatory function of rate.

To sum up, by controlling adjustable handover module array 12700, you can select the output port of each input wavelength and right Its output power is adjusted.As shown in attached drawing 12A, m different input wavelength of power is exported respectively by different combinations Into N number of output port, and the output power by adjusting each wavelength, realize flat output spectrum (i.e. each wavelength Power is consistent).Certainly, it can also be obtained by adjusting the output power of each wavelength according to the needs of practical application arbitrary Output spectrum.

Below by taking the optical routing device of the selection wavelength of a port 1*2 as an example, the specific light in Y-Z plane is analyzed Road.By analyze above it is recognized that while each angle of diffraction and corresponding adjustable handover module of the operation wavelength in X-Z plane not Together, but its switching principle in Y-Z plane is identical, therefore following only by taking a λ x in input wavelength as an example Carry out optical path analysis.

As shown in figure 12b, wavelength be λ x optical signal enter selection wavelength optical routing device after be split molding block 900 are divided into two polarized light components along Y-axis, are then incident on the first lens 1210 along Z axis positive direction.First lens 1210 are to two A polarized light component carries out collimator and extender, its beam diameter is made to increase to the diffraction resolution requirement for meeting system.Meanwhile by Be parallel to Z axis in the optical axis of the first lens 1210, thus two polarized light components reflected by the first lens 1210 after to its focus It propagates in direction.And since diffraction grating 1230 is in the focal position of the first lens 1210, two polarized light components are spreading out The incidence point penetrated on grating 1230 overlaps, and diffraction occurs in X-Z plane.And in Y-Z plane, two polarized light components exist The direction of propagation does not change after diffraction, and the second lens 1220 are incident on according to original direction.Due to the first lens 1210 and The focus of two lens 1220 overlaps, therefore for the second lens 1220, and two polarized light components come from its focus, so by The direction of propagation all becomes Z axis positive direction after the refraction of second lens 1220, and after the intersection at lens focus, two polarizations Light component has exchanged position in the Y-axis direction.Meanwhile second lens 1220 can by two collimate polarized light component converge to it On focal plane, that is, the mirror surface of adjustable handover module corresponding with wavelength X x 1000.The subsequent quilt of two polarized light components The translation of adjustable handover module 1000, (power proportions) adjust and reflection, the complete phase of device situation of process and control optical signal Together, it is not repeated herein.Along Z axis negative direction incoming dispersive module 1200 after each polarized light component is translated and reflects, pass through It is same to expand and converge transformation, and then input and output array 800 has been returned to after the merging of division optical module 900.

Since the first lens 1210 are identical with the focal length of the second lens 1220, adjustable handover module 1000 is to polarised light The translational movement of component is by 1：1 has been mapped to input and output array 800.But due to the incident path and reflex circuit of polarized light component It is opposite to cause 4F systems rear and front end translation direction symbol for intersection of the diameter at two lens focus.That is, if can If adjusting handover module 1000 to be Y-axis positive direction to the translation direction of polarized light component, then it returns to input and output array 900 When translation direction be exactly negative.

By the above optical path analysis it is found that all light beams are namely passing between the first lens 1210 and the second lens 1220 Sowing time, that is, be all the major diameter collimated light beam expanded by long-focus lens, just during dispersion light splitting and closing light Meet requirement of the optical grating diffraction resolution ratio to the diameter of incident beam well.Simultaneously as all light beams all pass through the first lens 1210 and second lens 1220 common focus, that is, diffraction grating 1230 position, so the institute on diffraction grating 1230 Launching spot all be overlap.This feature significantly reduces requirement of the system to the area of diffraction grating 1230.

Further, since the optical routing device of above-mentioned selection wavelength is the device based on control optical signal, therefore and control The device of optical signal is the same, and the optical routing device of selection wavelength provided by the invention can also be by the pattern work of 1*N or N*1 Make.Inference of being not difficult selects the optical routing device of wavelength that can select difference from each input port under N*1 operating modes Wavelength combination, and after the power of the optical signal of each wavelength is adjusted, be merged into output port output, detailed process exists This is not repeated.

In order to make it easy to understand, adjustable handover module array when the operation principle of the optical routing device of the above analysis selection wavelength It is made of multiple independent adjustable handover modules.And in practical applications, adjustable handover module array is not discrete in structure But integrated morphology as shown in Fig. 13.

First, all polarization adjusters that same switch unit is belonged in adjustable handover module array, are all integrated in one Large-scale liquid crystal cell polarizes in adjuster array 1311, as seen in fig. 13 (viewing surface is X-Y plane).Liquid crystal cell 1311 Two panels glass substrate (being overlapped in X-Y viewing surfaces) is connected by the sealing rubber ring 1301 of annular, and one is formed inside cushion rubber Cavity 1302, is filled with liquid crystal.Transparent electrode (ITO) on the inside of glass substrate then etches a line by the method for photoetching Pel array λ 1~λ m of property, what the transparent electrode between any two of which adjacent pixel was all completely separate.Therefore, liquid crystal Structure of the box 1311 in the Y-Z plane of each location of pixels liquid crystal cell as shown in fig. 4 is identical, and each pixel is equal For individual leads, driving voltage can be with independent control, a suitable independent polarization adjuster.Meanwhile all pictures in array The X axis coordinate of element corresponds with X axis coordinate of all working wavelength on 1220 back focal plane of the first lens, therefore polarizes and adjust Whole device array 1311 can carry out independent modulation to the optical signal of all wavelengths.

(the viewing surface X-Z as seen in fig.13b of adjustable handover module array 1300 based on polarization adjuster array 1311 Plane), it is made of several switch units 1310 and a reflector element 1320.Wherein each switch unit 1310 is again by one Polarization modulator array 1311 and a light beam translation piece 1312 form.Light beam translation piece 1312 covers polarization in X-Y plane All pixels on modulator array 1311, and the direction of its optical axis (in Y-Z plane) and thickness then with corresponding control light The device design of signal is identical.Reflector element 1320 is then by a polarization modulator array 1311 and 1322 groups of a speculum At, and speculum 1322 covers all pixels in polarization modulator array 1311 in X-Y plane.Meanwhile composition is adjustable All switch units 1310 of handover module array 1300 and the pel array of reflector element 1320 are completely heavy in X-Y plane It closes, i.e., the optical signal of each wavelength can pass through the respective pixel in all polarization modulator arrays 1311, so as to complete Independently switch over.Therefore, adjustable handover module array 1300 has been with adjustable handover module array 12700 shown in Figure 12 Congruence effect.

In fig. 12, diffraction grating 1230 is transmission-type grating, i.e. incident light and diffraction light is located at the light of its both sides Grid.In practical applications, reflection-type grating, i.e. incident light and diffraction light can be used all to replace transmiting in the grating of the same side Type grating, to be folded light path and substantially reduce its size, as shown in Fig. 14.Reflecting grating 1400 replaces transmitted light After grid 1230, by incident light to the same side, that is, Z axis negative direction diffraction, it is symmetric points along Z to be equivalent to entire light path using point diffraction Axis direction is folded.The second lens 1220 are omitted due to being overlapped with the first lens 1210 after light path folding, the first lens The effect for folding the first two lens is functioned as played in 1210 light path after folding.And adjustable handover module array (by taking integrated adjustable handover module array 1300 as an example) is reversed and moves on to the left side of the first lens 1210 after folding, towards Z axis positive direction, and its mirror surface is overlapped with the left side focal plane of the first lens 1210.Input and output array 800 and division Module 900 then abut adjustable handover module array 1300, Z axis coordinate is constant, i.e., the end face of input and output array 800 still with The left side focal plane of first lens 1210 overlaps, and its X axis coordinate can be according to adjustable handover module array after light path folding 1300 size and the angle of diffraction of reflecting grating 1400 are adjusted, the validity without influencing 4F systems.It it is easy to show that, it is attached The optical routing device of Wavelength-selective after being folded shown in Figure 14 no matter light path in X-Z plane or in Y-Z plane Light path, be all fully equivalent with the optical routing device light path with Wavelength-selective shown in Figure 12, specific process is no longer It repeats.The optical routing device of Wavelength-selective after folding is still a 4F system, and its length in the Z-axis direction is by 4F (four focal lengths of the first lens 1210) shorten to 2F (two focal lengths of the first lens 1210).

Similarly, as shown in Fig. 15, the first lens 1210 can be replaced using spherical reflector come to shown in attached drawing 14 The light path of the optical routing device of wavelength is selected further to be folded.The optical surface 1501 of spherical reflector 1500 is a ball Face, surface are coated with highly reflecting films, while reflecting incident light, equally there is the work of transformation to light beam also like lens With.The spherical radius of spherical reflector 1500 is twice of the focal length F of the first lens 1210, and equivalent focal length is spherical radius Half, i.e., it is equal with the focal length F of the first lens 1210.And its focus is located on the left of spherical surface, apart from the position of spherical surface vertex F It sets, therefore its focal plane is overlapped with the focal plane of the first original lens 1210.

After replacing the first lens 1210 in attached drawing 14 using spherical reflector 1500, the light of wavelength is selected shown in Figure 14 The light path of route device is folded by using 1210 present position of the first lens as symmetric points along Z-direction again.It rolls over again Poststack reflecting grating 1400 has also been moved on the left side focal plane of spherical reflector 1500, and optical surface is reversed, and becomes face To Z axis positive direction.And the Z axis coordinate of adjustable handover module array 1300, input and output array 800 and division module 1300 does not all have There is a change, therefore the optical routing device of the selection optical wavelength after folding again is still a 4F system, and it is in the Z-axis direction Length is then foreshortened to F again, as shown in Fig. 15.Similarly, no matter is the optical routing device of selection optical wavelength shown in attached drawing 15 Light path in the X-Z plane still light path in Y-Z plane, all with select the optical routing of optical wavelength to fill shown in attached drawing 12 It is fully equivalent to set light path, and detailed process is not repeated.

It should be pointed out that adjustable handover module array 1300, (and the corresponding division module of input and output array 800 900) and the position of reflecting grating 1400 and relativeness and revocable, can according to the angle of diffraction of reflecting grating 1400 with And the size of modules is adjusted.As long as and keep their Z axis coordinate constant, that is, keep 4F systems validity, choosing The light path for selecting the optical routing device of optical wavelength is just still equal to original light path.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention Within the scope of.

Claims

1. a kind of method of control optical signal, which is characterized in that the method includes：

The polarization state of polarised light after switching separation, converts on spatial position variation of the polarised light in polarization state to Variation obtain the first translation rear polarizer light；

It converts variation of the rotation rear polarizer light in polarization state to the variation on propagation path and obtains the second translation rear polarizer Light；

It synthesizes the second translation rear polarizer light and is emitted；

Wherein, the extraordinary ray component being kept completely separate in incident light and ordinary light component include：

The identical polarization state of polarised light is rotated 45 degree, obtain polarised light corresponding with the extraordinary ray component of incident light and with enter The corresponding polarised light of ordinary light component of light is penetrated, the polarization state of the corresponding polarised light is identical.

2. a kind of device of control optical signal, which is characterized in that described device includes input and output array, division module, at least One light polarization modulator, at least one light beam translation piece, polarization apparatus and speculum；

Division module, the extraordinary ray component for being kept completely separate in incident light and ordinary light component, the polarization after being detached Light, and synthesize the polarised light that light polarization modulator returns；

Light beam translation piece, for converting variation of the switching rear polarizer light in polarization state to the variation on spatial position Obtain translation rear polarizer light；

Speculum is used for polarization by reflection light；

Wherein, the division module includes：First uniaxial crystal, the first reversible optical rotation plate, the second uniaxial crystal, at most two rotations Mating plate and irreversible optical rotation plate；

First uniaxial crystal, for incident light to be divided into extraordinary ray component and ordinary light component；

First reversible optical rotation plate, for extraordinary ray component and ordinary light component to be rotated by 90 ° respectively；

Second uniaxial crystal, for detaching postrotational extraordinary ray component and ordinary light component；

Reversible optical rotation plate, for rotating extraordinary ray component and ordinary light component to identical polarization direction；

It is identical to obtain two beam polarization states for the polarization state of the identical polarised light of polarization state to be rotated 45 degree for irreversible optical rotation plate Polarised light.

3. controlling the device of optical signal according to claim 2, which is characterized in that

First uniaxial crystal is additionally operable to the two mutually perpendicular polarised lights in beam polarization state direction of synthesis；

The first reversible optical rotation plate is additionally operable to the polarization state of the two orthogonal polarised lights in beam polarization state direction rotating 90 respectively Degree；

Second uniaxial crystal is additionally operable to increase the distance of the two mutually perpendicular polarised lights in beam polarization state direction；Described second The optical axis of uniaxial crystal is opposite with the direction of the first uniaxial crystal；

The reversible optical rotation plate, is additionally operable to respectively rotate the postrotational polarised light of two beams and obtains two beam polarization state directions and hang down mutually Straight polarised light；

The irreversible optical rotation plate, the polarization state for being additionally operable to translate two beams rear polarizer light rotate 45 degree.

4. controlling the device of optical signal according to claim 2, which is characterized in that the input and output array includes：

5. controlling the device of optical signal according to claim 2, which is characterized in that the polarization apparatus is that optical rotation plate or polarization are adjusted Device processed, the light polarization modulator rotate the polarization state of the translation rear polarizer light to adjust the work(of emergent light by driving voltage Rate.

6. a kind of optical routing method of selection wavelength, which is characterized in that this method includes：

The polarization state for switching polarised light respectively, converts variation of the polarised light in polarization state to the change on spatial position Change obtains the first translation rear polarizer light；

Different exit ports are respectively synthesized with the second translation rear polarizer light of selected wavelength, is obtained in exit ports selected Select the emergent light of wavelength；

Wherein, the extraordinary ray component by incident light and ordinary light component is completely separable includes：

7. selecting the optical routing method of wavelength according to claim 6, which is characterized in that described according to different wavelength separateds The consistent polarised light of the polarization state includes：

Collimate the consistent polarised light of the polarization state；

8. a kind of optical routing device of selection wavelength, which is characterized in that described device includes：Input and output array, division module, Dispersion compensation module, at least one light polarization modulator, at least one light beam translation piece, optically-active module and speculum；

Division module, for by incident light extraordinary ray component and ordinary light component it is completely separable, obtain polarization state it is consistent Polarised light, and synthesis dispersion compensation module return polarised light；

Dispersion compensation module, for selected not according to the consistent polarised light of polarization state described in different wavelength separateds, and merging The polarised light of co-wavelength；

Light beam translation piece is put down for converting variation of the polarised light in polarization state to the variation on spatial position The polarised light of different wave length after shifting, and by the polarised light input polarization modulator of selected different wave length；

Speculum, the polarised light for reflecting different wave length；

The end face of input and output array is located in the outside focal plane of dispersion compensation module, the outside focal plane of speculum and dispersion compensation module It overlaps；

9. selecting the optical routing device of wavelength according to claim 8, which is characterized in that the dispersion compensation module includes：

First lens, the incident polarized light consistent for collimating the polarization state, and convergence includes selected different wave length Focal plane on the outside of outgoing polarization light to the first lens；

Diffraction grating, for according to the polarised light after different wave length separation collimation, and the polarization of the selected different wave length of merging Light；

Second lens, for the polarised light of the different wave length after the separation to be refracted as one group of parallel polarised light, and by institute Polarised light is stated to converge on the outside of the second lens on focal plane；And it is the polarised light reflected from focal plane on the outside of the second lens is accurate Directly, and by the polarised light after collimation to focus direction on the inside of the second lens it reflects；

The focal length of first lens is equal with the focal length of the second lens and the focus of inside overlaps, and the center of diffraction grating is located at first The inside focus of lens and the second lens.

10. selecting the optical routing device of wavelength according to claim 8, which is characterized in that the dispersion compensation module includes：

The third lens, the polarised light consistent for collimating the polarization state, and the separation that reflection-type diffraction grating is exported Polarised light afterwards is refracted as one group of parallel polarised light, while the parallel polarised light is converged to respectively on the left of the third lens Focal plane；And will focal plane is reflected on the left of the third lens polarised light collimation, while by the polarised light after the collimation to Focus direction refraction on the right side of the third lens, and the outgoing polarization for including selected different wave length that reflection-type diffraction grating is merged Light converges to focal plane on the left of the third lens；

Reflection-type diffraction grating, for according to the polarised light after different wave length separation collimation, and the selected different wave length of merging Polarised light；

11. selecting the optical routing device of wavelength according to claim 8, which is characterized in that the dispersion compensation module includes：

Reflecting spherical mirror, the polarised light consistent for collimating the polarization state, and by described in reflection-type diffraction grating output points Polarised light from after is refracted as one group of parallel polarised light, while the parallel polarised light is converged to reflecting spherical mirror respectively Focal plane；And collimate the polarised light reflected from reflecting spherical mirror focal plane, while by the polarised light after the collimation to anti- The refraction of spherical mirror focus direction is penetrated, and the outgoing polarization light including selected different wave length that reflection-type diffraction grating merges is converged Gather reflecting spherical mirror focal plane；

12. selecting the optical routing device of wavelength according to claim 8, which is characterized in that the light polarization modulator is first Polarization modulator array, the optically-active module are the second polarization modulator array；

First Polarization Modulation array carries out independent modulation to the polarization state of the polarised light of each wavelength；The light beam translation piece leads to Smooth surface covers all pixels of the first Polarization Modulation array；

Second Polarization Modulation array carries out independent modulation to the polarization state of the polarised light of each wavelength；The reflecting surface of the speculum Cover all pixels of the second Polarization Modulation array.