CN105589130A - Power divider, wave divider, polarization beam splitter, and design method thereof - Google Patents
Power divider, wave divider, polarization beam splitter, and design method thereof Download PDFInfo
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- CN105589130A CN105589130A CN201410641817.7A CN201410641817A CN105589130A CN 105589130 A CN105589130 A CN 105589130A CN 201410641817 A CN201410641817 A CN 201410641817A CN 105589130 A CN105589130 A CN 105589130A
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Abstract
The invention discloses a power divider, a wave divider, a polarization beam splitter, and a design method thereof. The method comprises the following steps: obtaining a period and a duty ratio of a two-dimensional optical grating block; and through adjusting the period and duty ratio of the two-dimensional optical grating block, distributing incident waves in different forms. According to the method, through an optical wave deflection principle, a one-dimensional bar-shaped optical grating convergence principle and a two-dimensional array optical grating block convergence principle, power of the incident waves is distributed at any ratios, the incident waves with different wavelengths are spatially separate according to the different wavelengths, or, TE and TM hybrid incident waves are spatially separate in terms of polarization states, and the method has the advantages of simple calculation, convenient realization and quite low cost.
Description
Technical field
The present invention relates to photoelectron technology field, be specifically related to a kind of power splitter, interleaver and inclined to one sideShake beam splitter and method for designing thereof.
Background technology
Optical power distributor is one of core devices connecting optical line terminal and optical network unit, is alsoForm the important component part of other optical devices. All the time, because integrated light guide once becomesThe restriction of type technique, is difficult to allow integrated optical power splitter realize luminous power and distributes adjustable function, thisRestrict and set up in optical network structure according to different link loads, the reality of flexible allocation luminous powerExisting. At present, there are two kinds of technological approaches can obtain actual adjustable optical power distributor: one is YType optical fiber fused tapering type luminous power variable coupler, by two bare fibres are close together,In thermal-flame, heating makes it fusing, simultaneously at optical fiber two ends stretching optical fiber, makes fiber fuseDistrict becomes tapering transition section, thereby forms coupler, and this method is easy to realize in technique,But because device size is large, and be subject to the such environmental effects such as stress, can not provide stableLuminous power distribution ratio; Another kind is to utilize electric light or thermo-optic effect, by other additional in waveguideElectrode or thermode, realize adjustable to change the wherein mode of the refractive index of a branch-waveguideLight energy is distributed, but higher for technological requirement owing to making electrode, increases to a great extent simultaneouslyAdd the cost of equipment.
In addition, current interleaver is generally the interleaver based on MMI effect y branch waveguideStructure,, current polarization beam apparatus is the capable polarization beam apparatus of birefringent prism, is two by twoThe prism that refractive material is made is bonded together and forms, but the shortcoming of existing these two kinds of structuresVolume is large, is unfavorable for integrated; Optical power distributor based on photon crystal wave-guide has been reported at presentThere are the structures such as Y branching type optical power distributor, directional coupler, but all can not realize tunable meritRate is distributed, and has limited its practical application.
Summary of the invention
For defect of the prior art, the invention provides a kind of power splitter, interleaver and inclined to one sideShake beam splitter and method for designing thereof, the phase place that is mixed into ejected wave by modulation realizes described mixedThe power that is incorporated into ejected wave carries out arbitrarily than distributing, the ejected wave that is mixed into of described different wave length being carried outWavelength-division or, described TE and TM are mixed into ejected wave and carry out polarization state and separate.
First aspect, the invention provides the design of a kind of power splitter, interleaver and polarization beam apparatusMethod, comprising:
Obtain cycle and the dutycycle of two-dimensional grating piece;
By adjusting cycle and the dutycycle of described two-dimensional grating piece, incidence wave is distributed.
Optionally, described incidence wave is distributed and comprised: the power of described incidence wave is carried outArbitrarily than distributing, carrying out ripple to being mixed into ejected wave described in different wave length according to the difference of wavelengthPoint or, described TE and TM are mixed into ejected wave and carry out separating of polarization state.
Optionally, the power of described incidence wave is carried out arbitrarily, than distribution, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the merit proportion by subtraction of transmitted wave, by regulating cycle and the dutycycle of described two-dimensional grating piece, to instituteStating the power that TE and TM be mixed into ejected wave carries out arbitrarily than distribution.
Optionally, the default convergent point of transmitted wave of described basis and the distance of described two-dimensional grating pieceFrom, and the merit proportion by subtraction of default described transmitted wave, by regulating the cycle of described two-dimensional grating pieceAnd dutycycle, the power of described incidence wave is carried out arbitrarily, than distribution, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the merit proportion by subtraction of transmitted wave, obtain the phase-modulation relation of described two-dimensional grating piece;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave and meet defaultThe distance of convergent point and described two-dimensional grating piece, and when the merit proportion by subtraction of default described transmitted waveCycle and dutycycle, and by regulating cycle and the dutycycle of described two-dimensional grating piece, to describedThe power of incidence wave distributes;
Wherein, the transverse and longitudinal cycle of described two-dimensional grating piece is identical.
Optionally, describedly carry out according to the difference of wavelength being mixed into ejected wave described in different wave lengthWavelength-division, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the different wave length value of incidence wave, by regulating cycle and the dutycycle of described two-dimensional grating piece,The ejected wave that is mixed into described different wave length carries out wavelength-division according to the difference of wavelength value.
Optionally, the default convergent point of transmitted wave of described basis and the distance of described two-dimensional grating pieceFrom, and the different wave length value of default described incidence wave, by regulating described two-dimensional grating pieceCycle and dutycycle, carry out according to the difference of wavelength value the ejected wave that is mixed into of described different wave lengthWavelength-division, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and preset intoThe different wave length value of ejected wave, obtains the phase-modulation relation of described two-dimensional grating piece;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave and meet defaultThe distance of convergent point and described two-dimensional grating piece, and when the Wavelength Assignment of default described incidence waveCycle and dutycycle, and by regulating cycle and the dutycycle of described two-dimensional grating piece, to instituteThe ejected wave that is mixed into of stating different wave length carries out wavelength-division according to the difference of wavelength.
Optionally, describedly described TE and TM are mixed into ejected wave carry out separating of polarization state, bagDraw together:
According to default TE and the convergent point of TM transmitted wave and the distance of described two-dimensional grating piece, logicalCycle and the dutycycle of overregulating described two-dimensional grating piece, be mixed into ejected wave by described TE and TMBeing separated into that TE transmitted wave converges is a convergent point, and TM transmitted wave converges as another convergent point.
Optionally, convergent point and the described two-dimensional grating of the default TE of described basis and TM transmitted waveThe distance of piece, by regulating cycle and the dutycycle of described two-dimensional grating piece, by described TE andTM is mixed into ejected wave, and to be separated into that TE transmitted wave converges be a convergent point, TM transmitted wave converge intoAnother convergent point, comprising:
Saturating according to the default convergent point of TE transmitted wave and distance and the TM of described two-dimensional grating pieceThe distance of the convergent point of ejected wave and described two-dimensional grating piece, obtains the phase place of described two-dimensional grating pieceModulation relation;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain and meet described TE transmitted waveConvergent point and the distance of described two-dimensional grating piece and the convergent point of TM transmitted wave and described two dimensionCycle and dutycycle when the distance of grating piece, and by regulating the cycle of described two-dimensional grating pieceAnd dutycycle, described TE and TM are mixed into ejected wave and carry out polarization state and separate.
Optionally, described inThe transverse and longitudinal cycle of two-dimensional grating piece is identical, or the transverse and longitudinal cycle of described two-dimensional grating piece is not identical.
Second aspect, the present invention also provides a kind of power splitter, interleaver and polarization beam apparatus,Comprise:
Power splitter, for carrying out the power of described incidence wave arbitrarily than distributing;
Interleaver, for carrying out according to the difference of wavelength being mixed into ejected wave described in different wave lengthWavelength-division;
Polarization beam apparatus, for described TE and TM are mixed into ejected wave carry out polarization state pointFrom.
As shown from the above technical solution, a kind of power splitter provided by the invention, interleaver and polarizationBeam splitter and method for designing thereof, the method converges by light wave deflection principle, one dimension bar shaped gratingPrinciple and two-dimensional array grating piece converge principle, realized the described power that is mixed into ejected wave is enteredRow arbitrarily than distribution, to described different wave length be mixed into ejected wave carry out wavelength-division or, to describedTE is mixed into ejected wave with TM and carries out separating of polarization state.
Brief description of the drawings
A kind of power splitter, interleaver and polarization beam apparatus that Fig. 1 provides for one embodiment of the inventionThe schematic flow sheet of method for designing;
The incidence wave that Fig. 2 provides for one embodiment of the invention sees through grating block structure schematic diagram;
The sub-wave length grating piece that Fig. 3 A to 3B provides for one embodiment of the invention is in different weeksThe schematic diagram that affects on light-wave transmission rate and phase place under phase and dutycycle;
Positional structure signal between the adjacent gratings piece that Fig. 4 provides for one embodiment of the inventionFigure;
Fig. 5 filters TE/TM for the one dimension bar shaped sub-wave length grating that one embodiment of the invention providesThe schematic diagram that luminous power to TE/TM light wave when ripple (arbitrarily than) is distributed;
Fig. 6 enters the power of incidence wave for the two-dimensional array grating piece that the embodiment of the present invention providesRow is arbitrarily than the schematic diagram distributing;
The mixing of the two-dimensional array grating piece that Fig. 7 provides for the embodiment of the present invention to different wave lengthIncidence wave carries out the schematic diagram of wavelength-division according to the difference of wavelength;
Fig. 8 is mixed into TE and TM for the two-dimensional array grating piece that the embodiment of the present invention providesEjected wave carries out the schematic diagram of the separation of polarization state;
Fig. 9 divides incidence wave for the two-dimensional array grating piece that one embodiment of the invention providesThe schematic diagram of joining.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of invention is further described. Below implementExample is only for technical scheme of the present invention is more clearly described, and can not limit this with thisBright protection domain.
The embodiment of the present invention is mainly the sub-wavelength based on SOI (Semicon-on-insulator)Power splitter, interleaver and polarization beam apparatus and the method for designing thereof of grating piece.
Sub-wave length grating piece refers to that the cycle of grating piece is less than an operation wavelength. When light incidesThe sub-wave length grating piece of periodic arrangement, consistent to the phase-modulation of light wave; Work as but work as light incidentThe sub-wave length grating piece that arrange aperiodic, changes the phase-modulation of light wave, if chosenOne group of suitable grating piece combination aperiodic, makes its phase-modulation to light wave be linear change,Just can make the direction of propagation of light deflect, thereby realize the beam splitting to light wave.
Because one-dimensional grating is to Polarization-Sensitive, if use one-dimensional grating to containing TE, TM is mixedThe power division of closing ripple is more difficult, but two-dimensional array grating piece has depolarization, Ke YishiNow carry out the optical power distributor of power division to mixing ripple. But sometimes only need to be to TE or TMCarry out beam splitting, it is right when now can using one dimension sub-wave length grating TE/TM filtering, to realizeTM/TE carries out the optical power distributor of power division.
Fig. 1 shows the flow process of the method for designing of a kind of power splitter, interleaver and polarization beam apparatusSchematic diagram, as shown in Figure 1, the method comprises the steps:
101, obtain cycle and the dutycycle of two-dimensional grating piece;
102, by adjusting cycle and the dutycycle of described two-dimensional grating piece, incidence wave is carried outDistribute.
Realized said method cycle by regulating grating piece and dutycycle realize to described enterThe power of ejected wave carries out any than distribution, to being mixed into ejected wave described in different wave length according to wavelengthDifference carry out wavelength-division or, described TE and TM are mixed into ejected wave and carry out separating of polarization state.
Above-mentioned power division can be any ratio, such as: 1:1,2:1 or 5:2 etc. Wavelength AssignmentDifference according to incidence wave wavelength is distributed, such as: by the mixing of 1550nm and 1400nmIncidence wave decomposition is come.
For more clearly demonstrate above-mentioned two-dimensional grating piece by change cycle and dutycycle to mixedBe incorporated into the impact of ejected wave, first one-dimensional grating converged to theory by incidence wave and be elaborated.
The incidence wave that Fig. 2 provides for the embodiment of the present invention sees through one-dimensional grating structural representation, asShown in Fig. 2, electric field is: E (x, z)=E0(x,z)exp(-jk0(xsinθ+zcosθ))，
Wherein E0(x, z) is amplitude, wave vectorθ is the folder between wave vector and grating piece z axleAngle, therefore the phase place of light wave is Φ (x, z)=-k0(xsin θ+zcos θ), at specific z0The phase place at place isΦ(x)＝-k0xsinθ+α1. Now at z0A new phase outline function of place's structure:Φg(x)＝αxx+α2. After grating piece varying width d, point other phase place is changed to:
Φ(x)→：k0dsinθ＝ΔΦΦg(x)→：αxd＝ΔΦg
Due to ΔΦ=ΔΦg,
Determine after the angle of deflection, just can determine the variation α of phase placex。
According to above-mentioned light wave deflection theory, in practice, because change one by one grating pieceThickness can increase technology difficulty and precision is wayward, so the present invention adopts by changing lightThe cycle of grid piece and duty are recently realized the control to phase of light wave.
The sub-wave length grating piece that Fig. 3 A to 3B provides for one embodiment of the invention is in the different cyclesAnd the schematic diagram that affects on light-wave transmission rate and phase place under dutycycle, as shown in the figure, wave markThe part of note, between transmissivity 0.4%～1.3%. So as shown in the figure, according to design requirementCycle and duty cycle parameters, then form sub-wave length grating piece aperiodic successively.
In the time that the back wave phase place of above-mentioned one dimension bar shaped grating surface has following formula, describedEjected wave will converge;
Wherein, φ (x) is the transmitted wave phase place on described grating piece surface, and λ is incident wavelength, φ (x0)Centre position x0The phase value at=0 place, fxFor focal length. HCGs (high index of refraction sub-wavelength lightGrid piece) local light wave characteristic determines by the local physical dimension of HCGs, by reasonablyCycle and the dutycycle (p, η) of design gratings strips, make each xn place, gratings strips centerPhase place meets above formula. And as shown in Figure 4, described adjacent gratings bar meets following formula:
Wherein, described φ (xn+1) be the back wave phase place of n+1 bar shaped grating surface, λ be intoEjected wave is long, fxFor focal length, xnThe coordinate of the individual gratings strips of n (n >=0) center, pnIt is the cycle of n gratings strips.
By said method, by changing cycle and the dutycycle of sub-wave length grating piece, just canLight merit to TM/TE light wave when realizing one dimension bar shaped sub-wave length grating to TE/TM filteringRate (arbitrarily than) is distributed. As shown in Figure 5, one dimension bar shaped sub-wave length grating luminous power is dividedThe schematic diagram of joining.
By above-mentioned one-dimensional grating converge theory and power division theory, describe based onTwo-dimensional grating piece carries out arbitrarily than distribution, to different wave length the described power that is mixed into ejected waveDescribed be mixed into ejected wave according to the difference of wavelength carry out wavelength-division or, mixed to described TE and TMBe incorporated into ejected wave and carry out polarization separation.
Concrete, the described power that is mixed into ejected wave is carried out arbitrarily, than distribution, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the merit proportion by subtraction of transmitted wave, by regulating cycle and the dutycycle of described two-dimensional grating piece, to instituteStating the power that TE and TM be mixed into ejected wave carries out arbitrarily than distribution. Two dimension battle array as shown in Figure 6Row grating piece carries out arbitrarily than the schematic diagram distributing the power of incidence wave. Such as incident power isW, the received power after distribution is respectively W1 and W2.
Above-mentioned the described power that is mixed into ejected wave is carried out arbitrarily, than distribution, comprising the steps:
201, according to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, andPreset the merit proportion by subtraction of described transmitted wave, obtain the phase-modulation relation of described two-dimensional grating piece;
202,, according to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and differencePhase value under dutycycle;
203,, according to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave fullThe distance of the default convergent point of foot and described two-dimensional grating piece, and the merit of default described transmitted wave is dividedThan time cycle and dutycycle, and by regulating cycle and the dutycycle of described two-dimensional grating piece,Power to described incidence wave distributes.
Concrete, the method that also above-mentioned one dimension bar shaped sub-wave length grating luminous power can be distributed shouldFor the power division of two-dimensional array grating piece, the transmitted wave on described two-dimensional array grating piece surfaceWhen phase place has following formula, described transmitted wave will converge:
xn+1＝xn+p,n＝...-2,-1,0,1,2,...
yn+1＝yn+p,n＝...-2,-1,0,1,2,...
Wherein, xn+1，yn+1Represent respectively center grating piece (xn，yn) upper right corner gratingThe phase value of piece, xn，ynBe respectively the coordinate of grating piece center in array grating piece, pFor the cycle of grating piece, wave vectorfxy(convergent point is to grating piece for the default focal length of representativeVertical range), φ0Represent the center (x of two-dimensional grating piecen，yn) phase place locatedValue.
By said method, by changing cycle and the dutycycle of sub-wave length grating piece, just canRealize two-dimensional array grating piece any than distributing to incidence wave luminous power, need to illustrateBe, for the ease of realizing said method, the transverse and longitudinal cycle phase of above-mentioned two-dimensional grating piece of the present inventionWith. When different in transverse and longitudinal cycle of two-dimensional grating piece, also can reach above-mentioned effect, but adoptWhen identical with transverse and longitudinal cycle of above-mentioned two-dimensional grating piece, calculate above-mentioned PHASE DISTRIBUTION very fast.
In like manner, carry out wavelength-division to being mixed into ejected wave described in different wave length according to the difference of wavelength,Fig. 7 shows two-dimensional array grating piece different wave length is mixed into ejected wave according to the difference of wavelengthCarry out the schematic diagram of wavelength-division, if wavelength is λ1And λ2Be mixed into ejected wave, this incidence wave is passed throughChange after the cycle and dutycycle of grating piece, this incidence wave is distributed into λ1And λ2, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the different wave length value of incidence wave, by regulating cycle and the dutycycle of described two-dimensional grating piece,The ejected wave that is mixed into described different wave length carries out wavelength-division according to the difference of wavelength value.
The ejected wave that is mixed into described different wave length carries out wavelength-division, specifically comprises the steps:
301, according to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, andPreset the different wave length value of incidence wave, obtain the phase-modulation relation of described two-dimensional grating piece;
302,, according to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and differencePhase value under dutycycle;
303,, according to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave fullThe distance of the default convergent point of foot and described two-dimensional grating piece, and the wavelength of default described incidence waveDivide cycle and the dutycycle of timing, and by regulating cycle and the duty of described two-dimensional grating pieceRatio, carries out wavelength-division to the ejected wave that is mixed into of described different wave length according to the difference of wavelength.
In like manner, describedly described TE and TM be mixed into ejected wave carry out separating of polarization state, comprising:
According to default TE and the convergent point of TM transmitted wave and the distance of described two-dimensional grating piece, logicalCycle and the dutycycle of overregulating described two-dimensional grating piece, be mixed into ejected wave by described TE and TMBeing separated into that TE transmitted wave converges is a convergent point, and TM transmitted wave converges as another convergent point.
Concrete, described TE and TM are mixed into ejected wave, and to be distributed into that TE transmitted wave converges be a remittanceAccumulation, TM transmitted wave converges as another convergent point, and Fig. 8 shows two-dimensional array grating piece to TEBe mixed into ejected wave and carry out the schematic diagram separating of polarization state with TM, as shown in Figure 8, to TE andThe ejected wave that is mixed into of TM distributes, and TE ripple is converged as a bit, and TM ripple converges as anotherPoint, specifically comprises the steps:
401, according to the default convergent point of TE transmitted wave and the distance of described two-dimensional grating piece andThe distance of the convergent point of TM transmitted wave and described two-dimensional grating piece, obtains described two-dimensional grating piecePhase-modulation relation;
402,, according to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and differencePhase value under dutycycle;
403,, according to the phase-modulation relation of described two-dimensional grating piece, obtain that to meet described TE saturatingThe convergent point of the distance of the convergent point of ejected wave and described two-dimensional grating piece and TM transmitted wave with described inCycle and dutycycle when the distance of two-dimensional grating piece, and by regulating described two-dimensional grating pieceCycle and dutycycle, be mixed into ejected wave to described TE and TM and carry out polarization state and separate.
It should be noted that, above-mentioned to the described wavelength-division that is mixed into ejected wave or, to described TEBe mixed into TM the polarization state that ejected wave carries out on space and separate, concrete converge process in twoThe transverse and longitudinal cycle of dimension grating piece is identical, or the transverse and longitudinal cycle of described two-dimensional grating piece is not identical.
As shown in Figure 9, the top view that two-dimensional array sub-wave length grating piece distributes incidence wave.
The present invention also provides a kind of power splitter, interleaver and polarization beam apparatus, comprising:
Power splitter, for carrying out the power of described incidence wave arbitrarily than distributing;
Interleaver, for carrying out according to the difference of wavelength being mixed into ejected wave described in different wave lengthWavelength-division;
Polarization beam apparatus, for described TE and TM are mixed into ejected wave carry out polarization state pointFrom.
Interleaver of the present invention is phase of light wave is modulated based on two-dimentional sub-wave length grating array poorThe different separation that realizes different wave length.
Existing photonic crystal fiber (PCF) polarization beam apparatus is divided into three core light according to its structurePhotonic crystal fiber polarization beam apparatus and double-core photonic crystal fiber polarization beam apparatus. Three core PCF are inclined to one sideThe beam splitter that shakes is to utilize resonance effect that polarization is only occurred in a direction, thereby causes partiallyThe separation of the pattern of shaking; Twin-core PCF polarization beam apparatus is to utilize birefringence effect to realize two polarization statesSeparation. Aggregated(particle) structure volume is larger, is unfavorable for integrated. The polarization beam apparatus that the present invention proposes isUtilize realizing polarization and divide being mixed into the different polarization states phase-modulation of ejected wave of sub-wave length gratingBundle.
In description of the present invention, a large amount of details are described. But, can understand, thisInventive embodiment can be put into practice in the situation that there is no these details. At some examplesIn, be not shown specifically known method, structure and technology, so that not fuzzy to this descriptionUnderstanding.
Finally it should be noted that: above each embodiment is only in order to technical scheme of the present invention to be described,Be not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment,Those of ordinary skill in the art is to be understood that: it still can be recorded aforementioned each embodimentTechnical scheme modify, or some or all of technical characterictic is wherein equal to and is replacedChange; And these amendments or replacement do not make essence disengaging the present invention of appropriate technical solution eachThe scope of embodiment technical scheme, it all should be encompassed in claim of the present invention and descriptionIn the middle of scope.
Claims (10)
1. a method for designing for power splitter, interleaver and polarization beam apparatus, is characterized in that,Comprise:
Obtain cycle and the dutycycle of two-dimensional grating piece;
By adjusting cycle and the dutycycle of described two-dimensional grating piece, incidence wave is distributed.
2. method according to claim 1, is characterized in that, described incidence wave is carried outDistribution comprises: the power of described incidence wave is carried out any than distribution, to described in different wave lengthBe mixed into ejected wave according to the difference of wavelength carry out wavelength-division or, to described TE and TM mixing incidentRipple carries out the separation of polarization state.
3. method according to claim 2, is characterized in that, to the merit of described incidence waveRate is carried out any than distributing, and comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the merit proportion by subtraction of transmitted wave, by regulating cycle and the dutycycle of described two-dimensional grating piece, to instituteStating the power that TE and TM be mixed into ejected wave carries out arbitrarily than distribution.
4. method according to claim 3, is characterized in that, described basis is preset transmissionThe distance of the convergent point of ripple and described two-dimensional grating piece, and the merit of default described transmitted wave is dividedRatio, by regulating cycle and the dutycycle of described two-dimensional grating piece, to the power of described incidence waveCarry out arbitrarily, than distribution, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the merit proportion by subtraction of transmitted wave, obtain the phase-modulation relation of described two-dimensional grating piece;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave and meet defaultThe distance of convergent point and described two-dimensional grating piece, and when the merit proportion by subtraction of default described transmitted waveCycle and dutycycle, and by regulating cycle and the dutycycle of described two-dimensional grating piece, to describedThe power of incidence wave distributes;
Wherein, the transverse and longitudinal cycle of described two-dimensional grating piece is identical.
5. method according to claim 2, is characterized in that, described to different wave lengthThe described ejected wave that is mixed into carries out wavelength-division according to the difference of wavelength, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and default instituteState the different wave length value of incidence wave, by regulating cycle and the dutycycle of described two-dimensional grating piece,The ejected wave that is mixed into described different wave length carries out wavelength-division according to the difference of wavelength value.
6. method according to claim 5, is characterized in that, described basis is preset transmissionThe distance of the convergent point of ripple and described two-dimensional grating piece, and the different ripples of default described incidence waveLong value, by regulating cycle and the dutycycle of described two-dimensional grating piece, to described different wave lengthBe mixed into ejected wave and carry out wavelength-division according to the difference of wavelength value, comprising:
According to the default convergent point of transmitted wave and the distance of described two-dimensional grating piece, and preset intoThe different wave length value of ejected wave, obtains the phase-modulation relation of described two-dimensional grating piece;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain described transmitted wave and meet defaultThe distance of convergent point and described two-dimensional grating piece, and when the Wavelength Assignment of default described incidence waveCycle and dutycycle, and by regulating cycle and the dutycycle of described two-dimensional grating piece, to instituteThe ejected wave that is mixed into of stating different wave length carries out wavelength-division according to the difference of wavelength.
7. method according to claim 2, is characterized in that, described to described TE andTM is mixed into ejected wave and carries out the separation of polarization state, comprising:
According to default TE and the convergent point of TM transmitted wave and the distance of described two-dimensional grating piece, logicalCycle and the dutycycle of overregulating described two-dimensional grating piece, be mixed into ejected wave by described TE and TMBeing separated into that TE transmitted wave converges is a convergent point, and TM transmitted wave converges as another convergent point.
8. method according to claim 7, is characterized in that, described basis is preset TEWith the distance of convergent point and the described two-dimensional grating piece of TM transmitted wave, by regulating described two dimensionThe cycle of grating piece and dutycycle, be mixed into ejected wave by described TE and TM and be separated into TE transmitted waveConverging is a convergent point, and TM transmitted wave converges as another convergent point, comprising:
Saturating according to the default convergent point of TE transmitted wave and distance and the TM of described two-dimensional grating pieceThe distance of the convergent point of ejected wave and described two-dimensional grating piece, obtains the phase place of described two-dimensional grating pieceModulation relation;
According to RCWA algorithm, obtain described two-dimensional grating piece in different cycles and different dutyUnder phase value;
According to the phase-modulation relation of described two-dimensional grating piece, obtain and meet described TE transmitted waveConvergent point and the distance of described two-dimensional grating piece and the convergent point of TM transmitted wave and described two dimensionCycle and dutycycle when the distance of grating piece, and by regulating the cycle of described two-dimensional grating pieceAnd dutycycle, described TE and TM are mixed into ejected wave and carry out polarization state and separate.
9. according to the method described in any one in claim 6 or 8, it is characterized in that, described inThe transverse and longitudinal cycle of two-dimensional grating piece is identical, or the transverse and longitudinal cycle of described two-dimensional grating piece is not identical.
10. power splitter, interleaver and a polarization beam apparatus, is characterized in that, comprising:
Power splitter, for carrying out the power of described incidence wave arbitrarily than distributing;
Interleaver, for carrying out according to the difference of wavelength being mixed into ejected wave described in different wave lengthWavelength-division;
Polarization beam apparatus, carries out separating of polarization state for described TE and TM are mixed into ejected wave.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784028A (en) * | 2016-12-29 | 2017-05-31 | 北京邮电大学 | A kind of sub-wavelength beam-splitting optical grating hybrid integrated photodetector array |
| CN111413757A (en) * | 2020-03-02 | 2020-07-14 | 北京邮电大学 | Columnar lens, columnar beam splitting lens, optical detector and optical detector array |
| CN111596390A (en) * | 2020-06-28 | 2020-08-28 | 华南师范大学 | Plane grating with light splitting and focusing capabilities |
| CN114545620A (en) * | 2022-02-10 | 2022-05-27 | 中国科学院上海技术物理研究所 | Compensation design method for preparing dielectric super surface by non-ideal etching process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446772A (en) * | 2002-03-25 | 2003-10-08 | 三洋电机株式会社 | Component with fine structure and its mfg. method |
| CN101162295A (en) * | 2006-10-12 | 2008-04-16 | 朱开成 | Mould protection structure beam splitter based on the combination of sine and cosine field shake amplitude type modulator and Fresnel translating system |
| CN101350371A (en) * | 2007-07-18 | 2009-01-21 | 中国科学院半导体研究所 | Photon crystal grating on the top of a dual-color infrared quantum well detector |
| CN101611333A (en) * | 2006-12-08 | 2009-12-23 | 纽约市立大学研究基金会 | The Apparatus and method for of control light in compound substance |
| CN103064141A (en) * | 2013-01-28 | 2013-04-24 | 中国科学院苏州纳米技术与纳米仿生研究所 | Terahertz band-pass filter |
-
2014
- 2014-11-13 CN CN201410641817.7A patent/CN105589130A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1446772A (en) * | 2002-03-25 | 2003-10-08 | 三洋电机株式会社 | Component with fine structure and its mfg. method |
| CN101162295A (en) * | 2006-10-12 | 2008-04-16 | 朱开成 | Mould protection structure beam splitter based on the combination of sine and cosine field shake amplitude type modulator and Fresnel translating system |
| CN101611333A (en) * | 2006-12-08 | 2009-12-23 | 纽约市立大学研究基金会 | The Apparatus and method for of control light in compound substance |
| CN101350371A (en) * | 2007-07-18 | 2009-01-21 | 中国科学院半导体研究所 | Photon crystal grating on the top of a dual-color infrared quantum well detector |
| CN103064141A (en) * | 2013-01-28 | 2013-04-24 | 中国科学院苏州纳米技术与纳米仿生研究所 | Terahertz band-pass filter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106784028A (en) * | 2016-12-29 | 2017-05-31 | 北京邮电大学 | A kind of sub-wavelength beam-splitting optical grating hybrid integrated photodetector array |
| CN111413757A (en) * | 2020-03-02 | 2020-07-14 | 北京邮电大学 | Columnar lens, columnar beam splitting lens, optical detector and optical detector array |
| CN111413757B (en) * | 2020-03-02 | 2022-02-25 | 北京邮电大学 | Columnar lens, columnar beam splitting lens, optical detector and optical detector array |
| CN111596390A (en) * | 2020-06-28 | 2020-08-28 | 华南师范大学 | Plane grating with light splitting and focusing capabilities |
| CN114545620A (en) * | 2022-02-10 | 2022-05-27 | 中国科学院上海技术物理研究所 | Compensation design method for preparing dielectric super surface by non-ideal etching process |
| CN114545620B (en) * | 2022-02-10 | 2023-09-12 | 中国科学院上海技术物理研究所 | Compensation design method for preparing dielectric super-surface by non-ideal etching process |
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