CN108646344B - Single input and multi-output optical switch based on nonlinear optical sublattice - Google Patents
Single input and multi-output optical switch based on nonlinear optical sublattice Download PDFInfo
- Publication number
- CN108646344B CN108646344B CN201810415171.9A CN201810415171A CN108646344B CN 108646344 B CN108646344 B CN 108646344B CN 201810415171 A CN201810415171 A CN 201810415171A CN 108646344 B CN108646344 B CN 108646344B
- Authority
- CN
- China
- Prior art keywords
- waveguide
- layer
- nonlinear
- conducting shell
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1225—Basic optical elements, e.g. light-guiding paths comprising photonic band-gap structures or photonic lattices
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12133—Functions
- G02B2006/12145—Switch
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The present invention provides a kind of single input and multi-output optical switches based on nonlinear optical sublattice, including first wave conducting shell, second waveguide layer and third ducting layer, the setting of first wave conducting shell is arranged between third ducting layer and first wave conducting shell in second waveguide layer top, second waveguide layer；Second waveguide layer includes nonlinear waveguide, and the first wave conducting shell and third ducting layer include linear waveguide；Nonlinear waveguide is sinusoidal pattern waveguide, and linear waveguide is screw type waveguide；Optical switch further includes an input port and at least two output ports.The present invention can choose different output ports according to actual needs, and photoswitch corresponding to each output port cut-offs threshold value difference, increases flexibility in practical applications.
Description
Technical field
The invention belongs to optic communications and optical logic calculating field, are related to optical switch, and in particular to one kind is based on non-thread
The single input and multi-output optical switch of property photonic crystal lattice.
Background technique
With being constantly progressive for science and technology, the continuous development of communication network updates, and traditional photoswitch has been unable to meet
The demand of current each application field.Such as: mechanical optical switch, volume is very much not easy of integration, and response speed is slow；Microelectronics light is opened
It closes, though having preferable processing compatibility, insertion loss is big, and switch is unstable, and response speed is only in musec order etc..With
The development of photon technology, and the appearance of the photonic crystal lattice with multidirectional periodic structure provided for optical switch technology
New approaches.The control to light is realized by photonic crystal lattice, and then successfully develops full light photonic crystal lattice photoswitch, has broken tradition
The technical barrier of photoswitch.However, general full light photonic crystal lattice photoswitch only exists single input/mono- output at present, it is unfavorable for
To the flexible modulation of optical signal.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of based on nonlinear optical sublattice
Single input and multi-output optical switch solves full light photonic crystal lattice photoswitch in the prior art and only exists single input/mono- output, unfavorable
In the flexible modulation to optical signal the problem of.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:
A kind of single input and multi-output optical switch based on nonlinear optical sublattice, including first wave conducting shell a, second waveguide
Layer u and third ducting layer b, on the top second waveguide layer u, second waveguide layer u is arranged in third wave for the first wave conducting shell a setting
Between conducting shell b and first wave conducting shell a；
The second waveguide layer u includes (N+1) a nonlinear waveguide, and the first wave conducting shell a includes N number of linear waveguide,
Third ducting layer b includes N number of linear waveguide bn, wherein N is the positive integer greater than 4；
The nonlinear waveguide is sinusoidal pattern waveguide, and linear waveguide is screw type waveguide；
The optical switch further includes an input port and at least two output ports.
Further, the linear waveguide of the first wave conducting shell a be located at two nonlinear waveguide connecting line midpoints just on
Side, the linear waveguide of the third ducting layer b are located at the underface at two nonlinear waveguide connecting line midpoints.
Further, there is coefficient of coup C in layer between the every two adjacent nonlinear waveguide1, adjacent linear wave
Lead has layer coupling coefficient C between nonlinear waveguide2, wherein C2:C1For more than or equal to 1 and less than or equal to 2.
Further, the central waveguide position of serial number n=0 on the input face, output is arranged in one input port
The waveguide position of serial number n ∈ [- 6,15] is arranged in output face in port.
Further, the screw type waveguide and sinusoidal pattern waveguide pass through after formula (1) is modulated and are formed；
In formula (1), n is waveguide serial number；ωu,n、ωa,n、ωb,nRespectively first wave conducting shell a, second waveguide layer u, third
The eigenfrequency of n-th of waveguide in ducting layer b；ωΓxFor the long axis of screw type waveguide；ωΓyFor the short axle of screw type waveguide；
ω is waveguide static state resonant frequency,C is the light velocity=3x10 in vacuum8M/s, a0For waveguide radius, n1To adjust
Waveguide index after system, n2For substrate refractive index, and M ω=ωu-ωa=ωb-ωu, wherein M=1,WithRespectively u layer before modulation, a layers, b layers of waveguide static state are total to
Vibration frequency, n1u, n1a, n1bU layer, a layers, b layers of waveguide index before respectively modulating；ΓxFor the modulated amplitude in the direction x；ΓyFor
The modulated amplitude in the direction y；Γx=sin (ψ), Γy=cos (ψ)；ψ is initial phase, ψ=π/4；Z is the direction of propagation；Fx(z) it is
Refractive index modulation function of the waveguide in the direction x；Fy(z) the refractive index modulation function for waveguide in the direction y.The present invention and existing skill
Art is compared, and is had the following technical effect that
In the shape of a spiral, nonlinear waveguide is in sinusoidal to linear waveguiding structure in the present invention, brilliant using the photon of this structure
Lattice, can choose different output ports according to actual needs, and photoswitch corresponding to each output port cut-offs threshold value not
Together, the flexibility of this photoswitch in practical applications is increased.
Detailed description of the invention
Fig. 1 (a1) is schematic structural view of the invention before modulating, and Fig. 1 (a2) is the preceding schematic cross-section of the invention of modulation；Fig. 1
It (b1) is structural schematic diagram of the invention after modulating, Fig. 1 (b2) is schematic cross-section of the invention after modulating；
Fig. 2 is nonlinear dispersion relation schematic diagram of the invention；
Fig. 3 is the light distribution schematic diagram in present invention output section.
Explanation is further explained in detail to particular content of the invention below in conjunction with attached drawing.
Specific embodiment
Specific embodiments of the present invention are given below, it should be noted that the invention is not limited to implement in detail below
Example, all equivalent transformations made on the basis of the technical solutions of the present application each fall within protection scope of the present invention.
Embodiment 1:
As shown in Figure 1, the present embodiment provides a kind of single input and multi-output optical switch based on nonlinear optical sublattice, packet
Including first wave conducting shell a, second waveguide layer u and third ducting layer b, first wave conducting shell a setting is on the top second waveguide layer u, and second
Ducting layer u is arranged between third ducting layer b and first wave conducting shell a；The second waveguide layer u includes (N+1) a nonlinear wave
It leads, the first wave conducting shell a includes N number of linear waveguide, and third ducting layer b includes N number of linear waveguide bn, wherein N is greater than 4
Positive integer；Nonlinear waveguide is sinusoidal pattern, and linear waveguide is screw type waveguide；Optical switch further include an input port and
At least two output ports.
Since waveguide is geometry modulation type in the present invention: (a layers) of first layer are to rotate clockwise helix waveguide, the
Two layers (u layers) are the sine waveguide of the direction x modulation type, (b layer) of third layer to rotate helix waveguide counterclockwise, therefore whether the
When two ducting layers or the first/tri- ducting layer input light wave, three layers of waveguide can all show left-right asymmetry light intensity in output face
Distribution；Since there are Kerr nonlinearity effects for the second layer in the present invention, so each waveguide output intensity will be entered light intensity
It influences.When second waveguide layer inputs light wave, with the increase of incident intensity, different waveguide can be exported in second waveguide layer
Light wave.As long as determining detector power response threshold value, multi output end output light wave can be obtained, to realize that multi output optics is opened
It closes；When first or third ducting layer input light wave, with the increase of incident intensity, light wave will be at the first/tri- ducting layer center
The output of binary channels light wave and the output of single channel light wave are realized at waveguide position.
Specifically, the linear waveguide of first wave conducting shell is located at the surface at two nonlinear waveguide connecting line midpoints, described
The linear waveguide of third ducting layer is located at the underface at two nonlinear waveguide connecting line midpoints.
There is coefficient of coup C in layer between the every two adjacent nonlinear waveguide1, adjacent linear waveguide and non-linear
There is layer coupling coefficient C between waveguide2, wherein C2:C1For more than or equal to 1 and less than or equal to 2；
Wherein, an input port is arranged in any waveguide, and at least two output ports are respectively set in waveguide in office.
As shown in Fig. 1 (a2), c1,c2For modulation before layer in layer coupling coefficient；As shown in Fig. 1 (b2), C1,C2
For the effective coupling coefficient after modulation；Therefore the eigenfrequency of linear type waveguide need to be modulated, to linear type waveguide sheet
The modulation of sign frequency can pass through the combination result parameter F to linear type waveguidex,FyModulation realize that the present invention passes through formula
(1) eigenfrequency of waveguide is modulated:
In formula (1), n is waveguide serial number；ωu,n、ωa,n、ωb,nRespectively first wave conducting shell a, second waveguide layer u, third
The eigenfrequency of n-th of waveguide in ducting layer b；ωΓxFor the long axis of screw type waveguide；ωΓyFor the short axle of screw type waveguide；
ω is waveguide static state resonant frequency,C is the light velocity=3x10 in vacuum8M/s, a0For waveguide radius, n1To adjust
Waveguide index after system, n2For substrate refractive index, and M ω=ωu-ωa=ωb-ωu, wherein M=1,WithRespectively a layers before modulation, u layers, b layers of waveguide are quiet
State resonant frequency, n1u, n1a, n1bEach layer waveguide index before respectively modulating；ΓxFor the modulated amplitude in the direction x；ΓyFor the side y
To modulated amplitude；Γx=sin (ψ), Γy=cos (ψ)；ψ is initial phase, ψ=π/4；Z is the direction of propagation；FxIt (z) is wave
Lead the refractive index modulation function in the direction x；Fy(z) the refractive index modulation function for waveguide in the direction y.After ovennodulation, wave
The coefficient of coup between leading introduces the phase factor of a φ, meets φ=2M ψ, which realizes the Equivalent Magnetic Field of light wave
Effect, as shown in Fig. 1 (b2).The geometry of linear waveguide becomes helical form, the geometry of nonlinear waveguide after this external modulation
It is as shown in Figure 1 that shape becomes sinusoidal pattern.In the present invention, φ=pi/2, effective coupling coefficient C2/C1=1.2704.In the present invention
Helix waveguide structure laser ablation production can be carried out in nonlinear material.
Fig. 2 is the dispersion relation curve of non-linear dependence of the present invention, it can be seen that the dispersion curve after ovennodulation is not
About origin symmetry Fig. 2 (b), the light field of output plane will be no longer uniformly distributed at this time；With the enhancing of nonlinear interaction, color
Non-dramatic song line restores symmetry status [Fig. 2 (d)], and output face light field will be uniformly distributed at this time.
30 nonlinear waveguides are chosen in this example, using non-linear layer central waveguide as input waveguide [Fig. 3 (a1)]
With output waveguide, it is denoted as n=0.When introduce modulation after optical field distribution it is uneven, output waveguide is without light intensity, photoswitch at this time
In closed state [Fig. 3 (a2-a4)]；With the increase of input light intensity, the light wave of output face gradually tends to symmetrical [Fig. 3
(a5-a7)], choose at this time it is different cut-off threshold value photoswitch and have different cut-off state；When input light intensity is sufficiently strong,
It will appear soliton state, this light switch is opened.In actual operation, multiple waveguides may be selected as output waveguide, different is defeated
The photoswitch of out position has different responses to light intensity, and the optical switch of single input and multi-output may be implemented；When first or third
Ducting layer, i.e., using linear layer central waveguide as input waveguide when [Fig. 3 (b1)], with the increase of incident intensity, light wave will be
The output of binary channels light wave and single channel light wave output [Fig. 3 (b2-b8)] are realized at first/tri- ducting layer central waveguide position.
Claims (5)
1. a kind of single input and multi-output optical switch based on nonlinear optical sublattice, which is characterized in that including first wave conducting shell
A, second waveguide layer u and third ducting layer b, on the top second waveguide layer u, second waveguide layer u is set for the first wave conducting shell a setting
It sets between third ducting layer b and first wave conducting shell a；
The second waveguide layer u includes N+1 nonlinear waveguide, and the first wave conducting shell a includes N number of linear waveguide an, third wave
Conducting shell b includes N number of linear waveguide bn, wherein N is the positive integer greater than 4；
The nonlinear waveguide is sinusoidal pattern waveguide, and linear waveguide is screw type waveguide；
The optical switch further includes an input port and at least two output ports, and one input port setting is in office
In one waveguide, at least two output port is arranged in any waveguide.
2. the single input and multi-output optical switch according to claim 1 based on nonlinear optical sublattice, which is characterized in that
The linear waveguide of the first wave conducting shell a is located at the surface at two nonlinear waveguide connecting line midpoints, the third ducting layer b
Linear waveguide be located at the underface at two nonlinear waveguide connecting line midpoints.
3. the single input and multi-output optical switch according to claim 2 based on nonlinear optical sublattice, which is characterized in that
There is coefficient of coup C in layer between the every two adjacent nonlinear waveguide1, between adjacent linear waveguide and nonlinear waveguide
With layer coupling coefficient C2, wherein C2:C1For more than or equal to 1 and less than or equal to 2.
4. the single input and multi-output optical switch according to claim 1 based on nonlinear optical sublattice, which is characterized in that
The central waveguide position of serial number n=0 on the input face is arranged in one input port, and output port is arranged in output face
The waveguide position of serial number n ∈ [- 6,15].
5. the single input and multi-output optical switch according to claim 1 based on nonlinear optical sublattice, which is characterized in that
The screw type waveguide and sinusoidal pattern waveguide pass through after formula (1) is modulated and are formed；
In formula (1), n is waveguide serial number；ωu,n、ωa,n、ωb,nRespectively first wave conducting shell a, second waveguide layer u, third waveguide
The eigenfrequency of n-th of waveguide in layer b；ωΓxFor the long axis of screw type waveguide；ωΓyFor the short axle of screw type waveguide；ω is
Waveguide static state resonant frequency,C is the light velocity=3x10 in vacuum8M/s, a0For waveguide radius, n1After modulation
Waveguide index, n2For substrate refractive index, and M ω=ωu-ωa=ωb-ωu, wherein M=1,WithRespectively modulate u layers first, a layers, b layers of waveguides static state
Resonant frequency, n1u, n1a, n1bU layer, a layers, b layers of waveguide index before respectively modulating；ΓxFor the modulated amplitude in the direction x；Γy
For the modulated amplitude in the direction y；Γx=sin (ψ), Γy=cos (ψ)；ψ is initial phase, ψ=π/4；Z is the direction of propagation；Fx(z)
Refractive index modulation function for waveguide in the direction x；Fy(z) the refractive index modulation function for waveguide in the direction y.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415171.9A CN108646344B (en) | 2018-05-03 | 2018-05-03 | Single input and multi-output optical switch based on nonlinear optical sublattice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415171.9A CN108646344B (en) | 2018-05-03 | 2018-05-03 | Single input and multi-output optical switch based on nonlinear optical sublattice |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108646344A CN108646344A (en) | 2018-10-12 |
| CN108646344B true CN108646344B (en) | 2019-07-12 |
Family
ID=63748720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810415171.9A Active CN108646344B (en) | 2018-05-03 | 2018-05-03 | Single input and multi-output optical switch based on nonlinear optical sublattice |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108646344B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5502783A (en) * | 1994-08-18 | 1996-03-26 | Northern Telecom Limited | Polarization independent optical directional coupler wavelength tunable filters/receivers |
| CN1853123A (en) * | 2003-07-18 | 2006-10-25 | 日本板硝子株式会社 | Photonic crystal waveguide, homogeneous medium waveguide, and optical device |
| CN1209646C (en) * | 2003-07-28 | 2005-07-06 | 浙江大学 | Two-dimensional multimode interference power divider |
| KR100749492B1 (en) * | 2005-08-05 | 2007-08-14 | 인하대학교 산학협력단 | A triplexer module filter for fiber-to-the-home user |
-
2018
- 2018-05-03 CN CN201810415171.9A patent/CN108646344B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108646344A (en) | 2018-10-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100888299B1 (en) | Optical switch | |
| US7403678B2 (en) | Optical switching element | |
| CN103370650B (en) | Waveguide-type optical switch | |
| ITMO20080262A1 (en) | OUTDOOR OPTICAL MODULATOR WITH DOMAIN REVERSAL TO PROVIDE A CONSTANT CHIRP FOR VARYING FREQUENCY | |
| CN107238951B (en) | Low bias large bandwidth electro-optic modulator | |
| CN104503184A (en) | Micro-ring resonator-based novel four-line to two-line electro-optical priority encoder | |
| KR19990052202A (en) | Electro-optic polymer optical waveguide device structure to reduce driving voltage and loss | |
| CN105158849A (en) | Lithium niobate optical waveguide device and manufacturing method thereof | |
| EP1184690A2 (en) | Optical element | |
| US5712935A (en) | Optical switch | |
| CN108646344B (en) | Single input and multi-output optical switch based on nonlinear optical sublattice | |
| Yi et al. | Electro-optic modulator with exceptional power-size performance enabled by transparent conducting electrodes | |
| Kang | Phase-shift-keying and on-off-keying with improved performances using electroabsorption modulators with interferometric effects | |
| CN105676485B (en) | A kind of full fiber type electrooptic modulator based on D type twin-core fiber | |
| Lv et al. | Graphene-embedded first-order mode polymer Mach–Zender interferometer thermo-optic switch with low power consumption | |
| CN112241042B (en) | Low-crosstalk cross polymer micro-nano optical fiber | |
| CN104503185B (en) | A kind of binary optic subtracter based on micro-ring resonator | |
| Chen et al. | Chip-scale nanophotonic switch based on a waveguide-metamaterial coupling mechanism | |
| Xia et al. | Reduction of non-uniformity for a 16× 16 arrayed waveguide grating router based on silica waveguides | |
| Luo et al. | Inverse design of deformed Sb 2 Se 3 stripes in silicon waveguide for reconfigurable mode converters | |
| JP2008009314A (en) | Optical waveguide element, optical modulator, and optical communication device | |
| CN111367098B (en) | Electro-optic phase shifter based on graphene periodic structure | |
| Hashemi et al. | Design, simulation of XOR/XNOR and AND logic gates using the optical two-circle switch | |
| CN102879923A (en) | Y-branch directional-coupler electro-optic modulator on basis of organic polymers | |
| Lee et al. | A novel vertical/spl Delta//spl kappa/directional coupler switch using liquid crystals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |