CN108802908B - Two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect - Google Patents
Two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect Download PDFInfo
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- CN108802908B CN108802908B CN201810414789.3A CN201810414789A CN108802908B CN 108802908 B CN108802908 B CN 108802908B CN 201810414789 A CN201810414789 A CN 201810414789A CN 108802908 B CN108802908 B CN 108802908B
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- 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
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- 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
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The present invention provides a kind of two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect, including first wave conducting shell and second waveguide layer, first wave conducting shell is arranged on second waveguide layer top；First wave conducting shell include include N+m waveguide, wherein serial number v1To vNN number of waveguide be nonlinear waveguide, N+m waveguide arrangement in same level, wherein m be positive integer；Second waveguide layer includes N-1 linear waveguide, and the N-1 linear waveguide is arranged in same level；Wherein serial number u1Linear waveguide have positive defect, serial number uN‑1Linear waveguide have negative defect；Two-output impulse generator optical switch further includes two input ports and two output ports.The present invention has the photoswitch transmitance of non-linear dependence, and the different light intensity of different input terminals have different light passing states, can flexibly regulate and control optical path and cut-off the optical path protection, it can be achieved that in the case of high input light intensity.
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 containing scarce
Fall into the two-output impulse generator optical switch of nonlinear optical sublattice.
Background technique
With the continuous promotion of traditional integrated technique, transistor circuit moves closer to physics limit, and Moore's Law will at that time
No longer it is applicable in.Electric signal is replaced to become the new outlet for developing integrated technique with optical signal, wherein all-optical-switch is in photometry
It calculates and is occupied an important position in optical information processing.
Traditional mechanical optical switch volume is very much not easy of integration, and response speed is slower；Although microelectronics photoswitch has
Preferable processing compatibility, but insertion loss is big, switch is unstable, and response speed is only in musec order.With photon technology
Development, photonic crystal lattice appears in people at the moment as a kind of completely new full optical platform, but general full light photonic crystal lattice light
Switch only exists single input/mono- output, is unfavorable for the flexible modulation to optical signal.Furthermore high with the introducing of nonlinear effect
The optical signal of power density inherently generates damage to optical device, so the protection to optical path is also a problem to be solved it
One.
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 photon containing defect
The two-output impulse generator optical switch of lattice, solving photoswitch in the prior art, with the introducing of nonlinear effect, high power is dense
The optical signal of degree leads to the problem of damage to optical device.
In order to solve the above-mentioned technical problem, the present invention is realised by adopting the following technical scheme:
A kind of two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect, including first wave conducting shell and
Two ducting layers, the second waveguide layer are arranged on first wave conducting shell top；
The first wave conducting shell is denoted as vn, including N+m waveguide, wherein serial number v1To vNN number of waveguide be nonlinear wave
It leads, the N+m waveguide arrangement is in same level, and wherein m is positive integer；
The second waveguide layer is denoted as un, including N-1 linear waveguide, the N-1 linear waveguide be arranged in same water
In plane；Wherein serial number u1Linear waveguide have positive defect, serial number uN-1Linear waveguide have negative defect；
The two-output impulse generator optical switch further includes two input ports (port 1 and 2) and two output port (ends
Mouthfuls 3 and 4).
Further, the linear waveguide is located at the surface at two non-linear wave band connecting line midpoints.
Further, there is coefficient of coup κ in layer between the every two adjacent nonlinear waveguide1, adjacent linear wave
Lead has layer coupling coefficient κ between nonlinear waveguide2；Wherein, κ1: κ2For more than or equal to 2 and less than or equal to 3.
Further, described two input ports are separately positioned on (port 1) or right linear wave on the left of first wave conducting shell
It leads region (port 2), two output ports are separately positioned on (port 3) or right linear waveguide region on the left of first wave conducting shell
(port 4).
Further, the linear waveguide and nonlinear waveguide are linear type waveguide.Compared with prior art, the present invention
It has the following technical effect that
The present invention is inputted equipped with dual-port and output end, the selection of photoswitch cut-off dependent on light intensity and input port,
The optical path protection in the case of high input light intensity can be achieved；
The present invention is serrated, and the photoswitch transmitance with non-linear dependence, the different light intensity of different input terminals have
Different same light states can flexibly regulate and control optical path and cut-off the optical path protection, it can be achieved that in the case of high input light intensity；
The present invention have it is small in size, structure is simple, is easily integrated, the low advantage of insertion loss.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the sectional view of structure of the invention；
When Fig. 3 (a) N is 2, under self-focusing nonlinear interaction, transmittance curve of the invention；When Fig. 3 (b) N is 3,
Under self-focusing nonlinear interaction, transmittance curve of the invention；When Fig. 3 (c) N is 2, under self-defocusing nonlinear interaction, this hair
Bright transmittance curve；Fig. 3 (d) be N be 3 when, under self-defocusing nonlinear interaction, transmittance curve of the invention；Wherein three
Angle and solid line represent under small defect situation (| β1,2|=0.1) (k=pi/2 represents, k=- pi/2 representative incident from port 1 to two-port
It is incident from port 2) transmitance, dotted line and astroid represent under strong defect situation (| β1,2|=1) transmitance of two-port；
Fig. 4 be in N=3, | β1,2|=1, κ2/κ1Numerical simulation in the case of=2 under different light intensity inputs transmits figure.
Explanation is further explained in detail to particular content of the invention below in conjunction with attached drawing.
Specific embodiment
It should be noted that as shown in Figure 1, left and right in the application refer to it is left and right in Fig. 1.
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, 2, the present embodiment provides a kind of two-output impulse generator light based on the sublattice of nonlinear optical containing defect
Switch, including first wave conducting shell and second waveguide layer are learned, second waveguide layer is arranged on first wave conducting shell top；
First wave conducting shell include include N+m waveguide, wherein serial number v1To vNN number of waveguide be nonlinear waveguide, it is described
N+m waveguide arrangement is in same level, and wherein m is positive integer；
Second waveguide layer includes N-1 linear waveguide, and the N-1 linear waveguide is arranged in same level；Wherein
Serial number u1Linear waveguide have positive defect, serial number uN-1Linear waveguide have negative defect；
Wherein, linear waveguide is located at the surface at two non-linear wave band connecting line midpoints.
There is coefficient of coup κ in layer between the every two adjacent nonlinear waveguide1, adjacent linear waveguide and non-linear
There is layer coupling coefficient κ between waveguide2；Wherein, κ1: κ2For 2:1.
Two-output impulse generator optical switch further includes two input ports and two output ports.Wherein, as shown in Figure 1 two
A input port is separately positioned on (port 1) or right linear waveguide region (port 2), two output ends on the left of first wave conducting shell
Mouth is separately positioned on (port 3) or right linear waveguide region (port 4) on the left of first wave conducting shell.
Linear waveguide and nonlinear waveguide in the present embodiment are linear type waveguide.As N=2,As shown in Fig. 3 (a) and Fig. 3 (c).
As N=3,Such as Fig. 3
(b) and shown in Fig. 3 (d).
Wherein:
V2=ε (β2)T0e3ik+ρ(β2)T0e4ik；
The κ of ω=- 21cosk；
V1=eikR0+e-ikR；
In formula, T0For transmission amplitude, R is reflected amplitude, R0For incident amplitude, β1,2For defect size, k is light wave wave vector.
As shown in Fig. 3 (d), as α=- 1, N=3, | β1,2| when=1, after two curves first increase with the increase of light intensity
Reduce.In dim light, the transmitance of two input terminal input light switch is all very low, and most of energy is reflected, and two
Notable difference is not present in curve, illustrates that two inputs should have identical switch state --- and only one output port is in beat
Open state；In medium light intensity, the light wave of 1,2 ports input has higher transmitance, but two curves exist significantly
Difference illustrates to have different switch states from 1,2 port input optical switches at this time, realizes the light of dual-port input/output
Learn switch.In strong light situation, the transmittance curve of 1,2 ports input light switch is greatly reduced, and illustrates most of energy quilt
Reflection, realizes optical path protective effect.By being analyzed above it is found that the present invention can have self-defocusing nonlinear effect simultaneously in one kind
It is realized in system containing stronger defect.
Two-output impulse generator optical switch proposed in the present invention can pass through the different layers progress high temperature in lithium niobate
Spread the method preparation of iron and magnesium.Non-linear layer waveguide can pass through High temperature diffusion Fe2O3It is formed, linear layer can pass through high temperature
The method of MgO is spread to inhibit photorefractive effect, to prepare linear waveguide；Changing doping concentration may be implemented positive and negative defect,
Make defect refractive index n0±(10-3~10-4)(n0For the refractive index of linear layer common waveguide).The coefficient of coup and waveguide spacing at
Direct ratio, so the coefficient of coup can be adjusted by adjusting the spacing between waveguide, if κ1=0.15mm-1, κ2=0.3mm-1, then
D=17 μm of spacing between nonlinear waveguide, the spacing between non-linear layer and linear layer are then d=34 μm.
Nonlinear waveguide number N=3, depth of defect are in the present embodiment | β |=n0±10-3, κ1=0.15mm-1, κ2
=0.3mm-1.Numerical simulation result is as shown in figure 4, in dim light, and in port 1, input can obtain output signal in port 3,
Port 4 is in closed state；Output signal can be obtained in port 4 when port 2 inputs, port 3 is in closed state；Continue to increase light
By force, the signal inputted from port 1 can be low-loss by photoswitch, obtains signal output in port 4, and port 4 is opened at this time,
Port 3 is closed；The signal inputted from port 2 has output to believe by being in semi-transparent semi-reflecting state after photoswitch, in port 3,4
Number, photoswitch for two ports all in opened condition；In the case where strong light, the input of 1 port can only be exported from 3 ports, and 4
Port is in closed state, realizes the protective effect to optical path in 4 ports；Similar phenomenon is also had from what 2 ports inputted, it can be with
Realize the protective effect to the optical path in port 3.
Claims (4)
1. a kind of two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect, which is characterized in that including first
Ducting layer and second waveguide layer, the second waveguide layer are arranged on first wave conducting shell top；
The first wave conducting shell is denoted as vn, including N+m waveguide, wherein serial number v1To vNN number of waveguide be nonlinear waveguide,
The N+m waveguide arrangement is in same level, and wherein m is positive integer；
The second waveguide layer is denoted as un, including N-1 linear waveguide, the N-1 linear waveguide be arranged in same level
On；Wherein serial number u1Linear waveguide have positive defect, serial number uN-1Linear waveguide have negative defect；
The two-output impulse generator optical switch further includes two input ports and two output ports, described two input ports
It is separately positioned on first wave conducting shell left or right side linear waveguide region, it is left that two output ports are separately positioned on first wave conducting shell
Side or right linear band.
2. the two-output impulse generator optical switch according to claim 1 based on the sublattice of nonlinear optical containing defect, special
Sign is that the linear waveguide is located at the surface at two non-linear wave band connecting line midpoints.
3. the two-output impulse generator optical switch according to claim 2 based on the sublattice of nonlinear optical containing defect, special
Sign is there is coefficient of coup κ in layer between the every two adjacent nonlinear waveguide1, adjacent linear waveguide and non-linear
There is layer coupling coefficient κ between waveguide2；Wherein, κ1: κ2For more than or equal to 2 and less than or equal to 3.
4. the two-output impulse generator optical switch according to claim 1 based on the sublattice of nonlinear optical containing defect, special
Sign is that the linear waveguide and nonlinear waveguide are linear type waveguide.
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| CN201810414789.3A CN108802908B (en) | 2018-05-03 | 2018-05-03 | Two-output impulse generator optical switch based on the sublattice of nonlinear optical containing defect |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6283731A (en) * | 1985-10-08 | 1987-04-17 | Nec Corp | Optical switch |
| 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 |
| CN102790253A (en) * | 2011-05-18 | 2012-11-21 | 中国科学院上海微系统与信息技术研究所 | Directional coupler |
| US9746746B2 (en) * | 2014-08-01 | 2017-08-29 | Mohammad A Mazed | Fast optical switch and its applications in optical communication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6687427B2 (en) * | 2000-12-29 | 2004-02-03 | Intel Corporation | Optic switch |
-
2018
- 2018-05-03 CN CN201810414789.3A patent/CN108802908B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6283731A (en) * | 1985-10-08 | 1987-04-17 | Nec Corp | Optical switch |
| 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 |
| CN102790253A (en) * | 2011-05-18 | 2012-11-21 | 中国科学院上海微系统与信息技术研究所 | Directional coupler |
| US9746746B2 (en) * | 2014-08-01 | 2017-08-29 | Mohammad A Mazed | Fast optical switch and its applications in optical communication |
Non-Patent Citations (2)
| Title |
|---|
| 《Observation of beam deflection in one一dimensional photonic lattice in LiNb03 crystal accompanied with self-focusing and self-defocusing nonlinearities》;Yongqi Liu，Xinyuan Qi，Yang Lu，Zheng Cao;《Physics Letters A》;20151020;322-325 |
| 《非线性光子学晶格中的光传播性质研究》;齐新元;《中国博士学位论文全文数据库》;20110731;A005-18 |
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