CN1544965A - Plane single scale intergration acoustooptic wavelength route optical switch - Google Patents
Plane single scale intergration acoustooptic wavelength route optical switch Download PDFInfo
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- CN1544965A CN1544965A CNA2003101059822A CN200310105982A CN1544965A CN 1544965 A CN1544965 A CN 1544965A CN A2003101059822 A CNA2003101059822 A CN A2003101059822A CN 200310105982 A CN200310105982 A CN 200310105982A CN 1544965 A CN1544965 A CN 1544965A
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- interdigital transducer
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Abstract
The invention discloses a plane single-chip integrated optical wave long-route optical switch, including an optical waveguide chip and I/O optical fiber array on two sides of the chip, there are two waveguide lenses and an interdigital transducer group, connected by light paths; a computer chip strobe ultrasonic power supply electrifies the corresponding interdigtial transducer and excites acousto grating in the waveguide, as a result it can make the wavelength division multiplexing optical signals at N wavelengths:lambada1 lambada2...lambadaN incident from any one of the M incident ports allocated to N different output optical fiber ports according to wavelength routing rule by accousto-optic interaction; its character: adopting light paths of waveguide lenses and accousto-optic Prague grating deflecting mechanism, the whole device is a single-chip integrated waveguide structure with one or many selectable transmission ports, compact and highly-integrated, fast switched and good-repeatability of process and able to enhance yield and cost/performance trade-off.
Description
Technical field
The invention belongs to optical communication technique field and integrated opto-electronic field, relate to a kind of plane monolithic integrated acousto-optic wavelength route photoswitch based on acoustooptic effect.
Background technology
To the optical fiber measurement system, photoswitch all is its critical component from the high speed optical fiber communication network system, switches and Route Selection in order to realize the channel of light in the network light path.In today of information explosion, because the developing rapidly of wavelength-division multiplex technique is used for Route Selection, the photoswitch of wavelength Route Selection particularly, demand is urgent day by day aspect hypervelocity, vast capacity optical communication system intelligent.
Current, photoswitch can be divided into non-integrated spatial optical switches and integrated light guide photoswitch (IOWS) two big classes.IOWS has overcome defectives such as non-integrated-type photoswitch volume is big, switching speed slow, rebound shake, and the integrated and trend toward miniaturization of compliance with system has development potentiality most.IOWS mainly contains electro-optical type and two kinds of basic structures of sound-light type.Electro-optical type adopts the electrooptical effect theory, switching speed is fast, but its elementary cell mostly is 1*2 or 2*2 type directional coupler (bar waveguiding structure), multi-way switch all by this structural unit repeat to add up, cascade and forming, yield rate is low, cost is high, be difficult to realize producing in batches.Integrated acousto-optic type photoswitch adopts the acoustooptic effect principle, but mostly be acousto-optic tunable filter (AOTFs) structure at present, the gating port number is few, have only to be used and to realize multichannel wavelength routing function by cascade or with wavelength division multiplexer etc., simultaneously owing to be based upon on the strip optical waveguide basis, there are structure and complex process, cost is high and is difficult to realize problem such as batch process, thereby only be fit to carry out on the light signal/following road, but uncomfortable cooperation multichannel wavelength route photoswitch.
Summary of the invention
Defective or deficiency at above-mentioned prior art existence, the objective of the invention is to, provide a kind of compact conformation, integrated level height based on acoustooptic effect, at a high speed, good process repeatability, hyperchannel plane monolithic integrated acousto-optic wavelength route photoswitch that cost performance is high.
To achieve these goals, the applicant finds that in acoustooptic effect acoustooptic effect has the advantage that can realize 1*N basic structure, has utilized this characteristic in the acousto-optic spectrum analyzer of having realized just.The solution thinking of applicant's technical scheme is, the acoustooptic effect characteristic is used for wavelength route light switch design, and combines with waveguide lens, can obtain a class hyperchannel plane monolithic integrated acousto-optic wavelength route photoswitch.
Technical solution of the present invention is, a kind of plane monolithic integrated acousto-optic wavelength route photoswitch, comprise: a planar optical waveguide chip, it is characterized in that, the two ends of chip are provided with the input optical fibre array of M port and the output optical fibre array of N port, planar light waveguide on the substrate of the planar optical waveguide chip of chip is provided with first optical waveguide lens and second optical waveguide lens, be provided with the interdigital transducer group that interdigital transducer forms between two waveguide lenss, first optical waveguide lens, connect by the planar light waveguide light path successively between the interdigital transducer and second optical waveguide lens; Light from the different wave length of arbitrary incident end incident of M port input optical fibre array, at first expand bundle through waveguide lens, obtain deflection behind the acoustic grating that motivates through the interdigital transducer that is powered up by the ultrasonic-frequency power supply by computer chip programming gating again, last deflected beam is directed to the corresponding output terminal of N port output optical fibre array according to wavelength route principle through waveguide lens.
Some other characteristics of the present invention are, are connected by the butt joint coupling scheme between described input optical fibre array and output optical fibre array and the planar light waveguide.Desirable each value from 1 to N of the port number M of input optical fibre array, and each port input all is to comprise λ
1, λ
2... λ
NN wave-length division multiplexing optical signal.
The output port that powers up by the ultrasonic-frequency power supply of computer chip programming gating of described interdigital transducer provides; Power up the interdigital transducer difference, the emergent light port is promptly different.
Described interdigital transducer group comprises several interdigital transducers, the interdigital structure parameter of each interdigital transducer, refer to that logarithm, institute add and excite the sound field frequency can be identical or different, and the structure of each interdigital transducer and relative space position is determined by light path design.
Described first optical waveguide lens and second optical waveguide lens all adopt the waveguide lens that bore is big, aberration is little.
Plane of the present invention integrated acoustic waveguide multi-channel wavelength route photoswitch adopts the acoustooptic effect characteristic, can reduce switch technology difficulty, reduce cost, improve yield rate, the realization that helps producing in batches; Compare with the existing machinery switch simultaneously, switching speed improves greatly.
Description of drawings
Fig. 1 is a whole sketch of the present invention;
Fig. 2 is a chip structure synoptic diagram of the present invention;
Fig. 3 is a kind of structural representation of interdigital transducer;
Fig. 4 is one embodiment of the present of invention synoptic diagram.
Embodiment
The present invention is described in further detail below in conjunction with embodiment that accompanying drawing and inventor provide.
Referring to accompanying drawing 1～2, hyperchannel plane monolithic integrated acousto-optic wavelength route photoswitch, comprise: a planar optical waveguide chip 2, its two ends are provided with the input optical fibre array 1 of M port and the output optical fibre array 3 of N port, the planar optical waveguide 4 of planar optical waveguide chip 2 is provided with first optical waveguide lens 5 and second optical waveguide lens 7, be provided with the interdigital transducer group that several interdigital transducers 6 are formed between two optical waveguide lenss, first optical waveguide lens 5, interdigital transducer 6 and second optical waveguide lens 7 are connected by planar light waveguide 4 light paths successively; From the light of the different wave length of arbitrary incident end ini incident of M port input optical fibre array 1 earlier through waveguide lens 5, the acoustic grating that is motivated through the interdigital transducer 6 that powers up by computer chip 9 gating ultrasonic-frequency power supplies, 8 output ports again, then enter waveguide lens 7, be directed to the different output terminals of N port output optical fibre array 3 according to wavelength route principle.
What each port of M port input optical fibre array 1 was imported all is N wave-length division multiplexing optical signal.
By the stroke of going into fine 1 light be: incident optical port → planar waveguide 4 → the first waveguide lenss 5 → planar waveguide 4 → power up acoustic grating → planar waveguide 4 → the second waveguide lenss 7 → planar waveguide 4 → output optical fibre port 3 that interdigital transducer 6 forms; Light after waveguide lens expands bundle is through acoustic grating the time, and the light of different passages is diffracted into different directions, and they enter different output optical fibre ports after being focused on by second waveguide lens.
The interdigital transducer group is made up of several interdigital transducers 6, changes the combination that powers up interdigital transducer 6, can change the different port that emergent light arrives the output optical fibre array 3 of N port.
Through planar light waveguide 4, enter waveguide lens 5 after a certain passage incident of wavelength-division multiplex light from N port input optical fibre array 1, wherein the focal length of waveguide lens 5 is positioned on the input optical fibre array, thereby incident light expanded bundle, becomes the parallel beam of expansion;
Interacted by the several interdigital surface acoustic wave that excites and the parallel beams that expand behind the bundle of exciting of certain of external circuit gating in several interdigital transducers 6, make that the light of different incident ends, different wave length is diffracted and form along the parallel beam of different directions transmission; Power up for interdigital transducer 6 by computer chip 9 gating ultrasonic-frequency power supplies 8, the different interdigital transducers that power up make up corresponding different yawing moment.
Parallel beam after the deflection is focused on by it after planar waveguide is transferred to second waveguide lens 7, forms different outgoing luminous points, enters into the different port of output optical fibre array 3.
Device synthesis has been used the waveguide lens of wide aperture and the acousto-optic grating of big deflection capacity, forms a kind of single chip integrated non-slab waveguide main structure.
Referring to Fig. 3, described interdigital transducer group 6 is made up of several interdigital transducers, each interdigital structure parameter (comprise finger beam a, refer to spacing b), refer to logarithm n, interdigital transducer number K, each interdigital on institute add and excite the sound field frequency f can be identical or different.The inner structure parameter of interdigital transducer and the relative space position of each interdigital transducer are determined by light path design.In light path design is determined the interdigital transducer group behind each interdigital structural parameters and relative position, by the required interdigital transducer combination of external control circuit gating, external circuit adopts computer chip, is directed to N individual different output terminal from the wavelength division multiplexed light of N wavelength of arbitrary incident port incident according to wavelength route principle with regard to may command by programming; Is a kind of finger beam a and refers to that spacing b equates as figure, and be equal to 1/4 long interdigital transducer of sound wave, it is right that abab constitutes a finger.
Fig. 4 is the wavelength route photoswitch of the input of one 2 port 2 wavelength, the output of 2 ports.Among the figure, waveguide lens adopts the optical waveguide geodesic lens, and interdigital transducer adopts and refers to the interdigital transducer group that spacing equates with finger beam.Wavelength X
1=1550nm, λ
2The wavelength division multiplexed light of=1310nm is injected in the planar light waveguide of switch chip along incident optical port in1, the in2 of spacing 250 μ m, inlet port footpath diameter is 5mm afterwards, focal length is the optical waveguide geodesic lens of 4mm, be unfolded and be parallel beam, by the acoustic grating deflection of two interdigital transducer excitations of A, B, A group transducer finger beam a=b=2.9 μ m refers to long L=2mm afterwards, refer to logarithm n=50, the driving power frequency f
1=300MHz; The interdigital width a=b=2.4 of B transducer μ m, long L=2mm refers to logarithm n=50, institute adds frequency f
2=350MHz.If computer chip gating interdigital transducer A and B, the then λ of in1 port
1Light enters out1, λ
2Light enters out2; The λ of while in2 port
1Light enters out2, λ
2Light enters out1, has realized the wavelength-division routing function.
Claims (5)
1. plane monolithic integrated acousto-optic wavelength route photoswitch, comprise: a planar optical waveguide chip [2], it is characterized in that, the two ends of planar optical waveguide chip [2] are provided with the input optical fibre array [1] of M port and the output optical fibre array [3] of N port, planar light waveguide [4] on the substrate [10] of planar optical waveguide chip [2] is provided with first optical waveguide lens [5] and second optical waveguide lens [7], be provided with the interdigital transducer group that interdigital transducer [6] forms between first optical waveguide lens [5] and second optical waveguide lens [7], first optical waveguide lens [5], connect by planar light waveguide [4] light path successively between interdigital transducer [6] and second optical waveguide lens [7]; Light from the different wave length of arbitrary incident end incident of M port input optical fibre array [1], at first pass through waveguide lens [5] and expand bundle, obtain deflection after passing through the acoustic grating that the interdigital transducer [6] that powered up by the ultrasonic-frequency power supply [8] by computer chip [9] programming gating motivates again, last deflected beam is directed to the corresponding output terminal of N port output optical fibre array [3] according to wavelength route principle through waveguide lens [7].
2. plane as claimed in claim 1 monolithic integrated acousto-optic wavelength route photoswitch is characterized in that, is connected by the butt joint coupling scheme between described input optical fibre array [1] and output optical fibre array [3] and the planar light waveguide [4].Desirable each value from 1 to N of the port number M of input optical fibre array, and each port input all is to comprise λ
1, λ
2... λ
NN wave-length division multiplexing optical signal.
3. plane as claimed in claim 1 monolithic integrated acousto-optic wavelength route photoswitch is characterized in that, the output port that powers up by the ultrasonic-frequency power supply [8] of computer chip [9] programming gating of described interdigital transducer provides; Power up the interdigital transducer difference, the emergent light port is promptly different.
4. plane as claimed in claim 1 monolithic integrated acousto-optic wavelength route photoswitch, it is characterized in that, described interdigital transducer group comprises several interdigital transducers [6], the interdigital structure parameter of each interdigital transducer, refer to that logarithm, institute add and excite the sound field frequency can be identical or different, and the structure of each interdigital transducer and relative space position be determined by light path design.
5. plane as claimed in claim 1 monolithic integrated acousto-optic wavelength route photoswitch is characterized in that described first optical waveguide lens [5] and second optical waveguide lens [7] all adopt the waveguide lens that bore is big, aberration is little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105982 CN1232845C (en) | 2003-11-28 | 2003-11-28 | Plane single scale intergration acoustooptic wavelength route optical switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105982 CN1232845C (en) | 2003-11-28 | 2003-11-28 | Plane single scale intergration acoustooptic wavelength route optical switch |
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| Publication Number | Publication Date |
|---|---|
| CN1544965A true CN1544965A (en) | 2004-11-10 |
| CN1232845C CN1232845C (en) | 2005-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310105982 Expired - Fee Related CN1232845C (en) | 2003-11-28 | 2003-11-28 | Plane single scale intergration acoustooptic wavelength route optical switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392450C (en) * | 2005-10-27 | 2008-06-04 | 上海未来宽带技术及应用工程研究中心有限公司 | 8X8 array optical switch system |
| CN113671630A (en) * | 2021-07-14 | 2021-11-19 | 电子科技大学 | Planar superlens structure nonreciprocal optical router based on silicon-based integration |
-
2003
- 2003-11-28 CN CN 200310105982 patent/CN1232845C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392450C (en) * | 2005-10-27 | 2008-06-04 | 上海未来宽带技术及应用工程研究中心有限公司 | 8X8 array optical switch system |
| CN113671630A (en) * | 2021-07-14 | 2021-11-19 | 电子科技大学 | Planar superlens structure nonreciprocal optical router based on silicon-based integration |
| CN113671630B (en) * | 2021-07-14 | 2022-11-08 | 电子科技大学 | Planar superlens structure nonreciprocal optical router based on silicon-based integration |
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| Publication number | Publication date |
|---|---|
| CN1232845C (en) | 2005-12-21 |
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