CN103631035A - Multi-mode interference Mach-Zehnder type double control all-optical switch - Google Patents
Multi-mode interference Mach-Zehnder type double control all-optical switch Download PDFInfo
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- CN103631035A CN103631035A CN201310535212.5A CN201310535212A CN103631035A CN 103631035 A CN103631035 A CN 103631035A CN 201310535212 A CN201310535212 A CN 201310535212A CN 103631035 A CN103631035 A CN 103631035A
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Abstract
The invention discloses a multi-mode interference Mach-Zehnder type double control all-optical switch, and belongs to the field of all-optical switches. The multi-mode interference Mach-Zehnder type double control full-optical switch further comprises a first control optical waveguide port, a second control optical waveguide port, a first filter and a second filter on the basis of a single-control full-optical switch. The first control optical waveguide port and the second control optical waveguide port are connected with a Mach-Zehnder interference arm. A first multi-mode interference area and a second multi-mode interference area are internally provided with multi-mode interference couplers. The first filter and the second filter are located in a first output waveguide port and a second output waveguide port respectively. According to the multi-mode interference Mach-Zehnder type double control full-optical switch, two paths of control light are introduced and can control the output of the two output ports, and a direct connection state and a cross state can be freely selected.
Description
Technical field
The present invention relates to a kind of all-optical switch, relate in particular to a kind of multiple-mode interfence Mach-Zender dual control all-optical switch.
Background technology
All-optical switch is one of the Primary Component in photon technology field, and major advantage is the conversion that they have avoided light-electricity and electrical-optical, is also an important devices of high speed full optical communication network.Research all-optical switch mainly improves its performance from three aspects: the one, and the device architecture that design makes new advances, the 2nd, the new material of the ultrafast relaxation of employing charge carrier, the 3rd, utilize the special nature of Spectrum of Semiconductor Quantum Wells to develop Ultrafast All Optical Switching.The present invention realizes dual control all-optical switch function from the structure aspects of device.It is the major part of dual control all-optical switch that multiple-mode interfence device (MMI) and Mach-increasing Dare are interfered (MZI) type device.It similarly is a kind of character of multimode waveguide that multiple-mode interfence has of one's own, and the cross direction profiles of input field can periodically be reappeared one or more pictures in the direction of propagation along waveguide.1972, Marcuse found can periodically produce the real image of object in graded index waveguide; 1973, Bryngdahl proposed homogeneous refractive index multimode planar waveguide and also can obtain from videoing; 1994, Bachmann provided the characteristic of multiple-mode interfence device imaging; Nineteen ninety-five, the people such as Soldano L B propose to have in integrated optics the multiple-mode interfence (Multimode Interference, MMI) of extensive use on J.Lightwave Technol; 2004, in the patent database (USPTO) of Zhao Yiping Deng Ren United States Patent and Trademark Office, reported a kind of Ultrafast of carbon nanotube polymer compound substance; 2005, the people such as Chen Yuanyuan proposed a quick response MMI-MZ thermo-optical switch based on Silicon-On-Insulator in Chinese Physics Letters; 2011, the people such as Bahrami proposed based on MZ-MMI Non-linear coupling type all-optical switch in Optik.These photoswitches are all to use carrier injection effect, thermo-optical, electric light to change the refractive index of waveguide material, and its structure and manufacture craft are comparatively complicated, and the response time is also at nanosecond order.
Chinese Patent Application No.: 201210372474.X, open day: on January 16th, 2013, disclose the patent document that a name is called multiple-mode interfence Mach-Zehnder all-optical switch.It comprises the first input waveguide port, the second input waveguide port, the first output waveguide port, the second output waveguide port, control optical waveguide port, control optical output port, the first multimode waveguide, Mach Zehnder interference arm, the second multimode waveguide, the first input waveguide port, the second input waveguide port is all connected to one end of the first multimode waveguide, the other end of the first multimode waveguide is connected with one end of the second multimode waveguide by Mach Zehnder interference arm, the first output waveguide port, the second output waveguide port, control the other end that optical output port is all connected to the second multimode waveguide, controlling optical waveguide port is connected with Mach Zehnder interference arm.This invention multiple-mode interfence Mach-Zehnder all-optical switch simple and compact for structure, cost of manufacture is low.But this invention is only added on an arm of Mach-Zeng Deer interferometer by single beam control light processed, realize the function of all-optical switch, cannot meet some special needs.Be similar to the illuminating lamp of stairs port, with regular tap, just cannot realize under upstairs house and can control, must use double control switch.
Summary of the invention
The problem that 1, will solve
For existing single control all-optical switch at some special occasions, as stairs port illumination, cannot realize the problem of the flexible Application under upstairs house, the invention provides a kind of multiple-mode interfence Mach-Zender dual control all-optical switch, it is introduced two-way and controls light, two control light all can control the output of two output ports, and it is freely selected between straight-through and intersection state.
2, technical scheme
For addressing the above problem, the present invention adopts following technical scheme.
Multiple-mode interfence Mach-Zender dual control all-optical switch, comprise the first input waveguide port, the second input waveguide port, the first output waveguide port, the second output waveguide port, the first multiple-mode interfence district, the second multiple-mode interfence district and Mach Zehnder interference arm, also comprise the first control optical waveguide port, the second control optical waveguide port, the first wave filter and the second wave filter, described the first control optical waveguide port, second is controlled optical waveguide port and is all connected with Mach Zehnder interference arm; In the first described multiple-mode interfence district, the second multiple-mode interfence district, be equipped with multi-mode interference coupler; The first described wave filter, the second wave filter lay respectively on the first output waveguide port, the second output waveguide port.
Preferably, the junction in the junction in described Mach Zehnder interference arm and the first multiple-mode interfence district, the second multiple-mode interfence district, the first output waveguide port, the second output waveguide port and the second multiple-mode interfence district is tapered structure.
More preferably, the value at the tapered angle of described tapered structure is in the range of tolerable variance of two afterimage output terminal generation translations of multimode waveguide.
Preferably, the type of the first described wave filter, the second wave filter is bandpass filter.
Preferably, the first described multiple-mode interfence district, the second multiple-mode interfence district equal in length, and length range is 890 μ m-900 μ m.
3, beneficial effect
Than prior art, beneficial effect of the present invention is:
(1) the present invention has inherited the refractive index that single beam control light processed changes single mode waveguide, make Mach Zehnder interference arm produce phase differential and realize light by the advantage of the on-off action with turn-offing: interfering on arm directly Access Control optical waveguide, make switch size compacter; Waveguide is made by the organic polymer material with good photochromic performance, with low cost; Nonlinear optical Kerr effect based on material, under high light effect, refraction index changing is fast, so the response time specific heat photoelectricity photoswitch of switch is shorter.
(2) the present invention adopts two to control optical waveguide port, controls respectively conducting and the disconnection of all-optical switch, realizes double-cotrolled type structure, compare with single control type structure, increase a control port, thereby increased the dirigibility of switch, there is more extensive and convenient purposes.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Number in the figure explanation: 1, the first input waveguide port; 2, the second input waveguide port; 3, the first output waveguide port; 4, the second output waveguide port; 5, first control optical waveguide port; 6, second control optical waveguide port; 7, the first multiple-mode interfence district; 8, the second multiple-mode interfence district; 9, Mach Zehnder interference arm; 10, the first wave filter; 11, the second wave filter.
Embodiment
For further understanding content of the present invention, below in conjunction with Figure of description and specific embodiment, describe the present invention.
As shown in Figure 1, multiple-mode interfence Mach-Zender dual control all-optical switch, comprise the first input waveguide port one, the second input waveguide port 2, the first output waveguide port 3, the second output waveguide port 4, the first multiple-mode interfence district 7, the second multiple-mode interfence district 8 and Mach Zehnder interference arm 9, the first input waveguide port one, the second input waveguide port 2 is all connected to the one end in the first multiple-mode interfence district 7, the other end in the first multiple-mode interfence district 7 is connected with the one end in the second multiple-mode interfence district 8 by Mach Zehnder interference arm 9, the first described output waveguide port 3, the second output waveguide port 4 is connected to the other end in the second multiple-mode interfence district 8, also comprise the first control optical waveguide port 5, second controls optical waveguide port 6, the first wave filter 10 and the second wave filter 11, first controls optical waveguide port 5, second controls optical waveguide port 6 is all connected with Mach Zehnder interference arm 9, in the first described multiple-mode interfence district 7, the second multiple-mode interfence district 8, be equipped with multi-mode interference coupler, the first wave filter 10, the second wave filter 11 lay respectively on the first output waveguide port 3, the second output waveguide port 4.
In addition, the junction in the junction in Mach Zehnder interference arm 9 and the first multiple-mode interfence district 7, the second multiple-mode interfence district 8, the first output waveguide port 3, the second output waveguide port 4 and the second multiple-mode interfence district 8 is tapered structure.The value at the tapered angle of tapered structure is in the range of tolerable variance of two afterimage output terminal generation translations of multimode waveguide.
The type of the first wave filter 10, the second wave filter 11 is bandpass filter.The first multiple-mode interfence district 7, the second multiple-mode interfence district 8 equal in length, and length range is 890 μ m.
The present invention is based on Mach-Zender and interfere (MZI) structure, multiple-mode interfence (MMI) principle and optical Kerr effect, designed MMI-MZI type all-optical switch.During work, operation wavelength light beam enters from the first input waveguide port one, from the second output waveguide port 4 outputs, or enters from the first input waveguide port 2, during from the first output waveguide port 3, is intersection state; From the first input waveguide port one, enter, from the first output waveguide port 3 outputs, or enter from the first input waveguide port 2, during from the second output waveguide port 4 output, be straight-through state.
Increase or do not increase and control the situation that light occurs and be divided into: (1), when not adding while controlling light beam, operation wavelength light beam input from the first input waveguide port one, and from the second output waveguide port 4 outputs, signal beams is intersection state; (2) when arbitrary end of the first control optical waveguide port 5 or the second control optical waveguide port 6 is inputted the control light beam of another wavelength and some strength, signal beams is straight-through state; (3) when the first control optical waveguide port 5 and second is controlled optical waveguide port 6 and inputted the control light beam of another wavelength and some strength simultaneously, signal beams is for intersecting state.
The present invention controls light intensity and should meet and cause that optical kerr effect produces π (or odd-multiple of π) phase differential interfering on arm, also to make second multiple-mode interfence district due to the variation of refractive index on the impact of double image position in range of tolerable variance.Because the length in multiple-mode interfence district becomes double image to flashlight, and to controlling light Cheng Dan picture, therefore, control light also in output terminal output, in order not affect the transmission of flashlight, in output waveguide, introduce the first light filter 10 and the second light filter 11, effect is to allow flashlight to pass through, and light is controlled in filtering.In addition, owing to controlling the introducing of light, make the refractive index in the second multiple-mode interfence district 8 produce faint change, this change can make output light field position change within the specific limits, therefore export single mode waveguide and use pyramidal structure, flashlight is exported in system allows range of tolerable variance.
The multi-mode interference coupler that the present invention applies to, the self-imaging of its principle of work based in multimode waveguide, when light beam enters multimode waveguide, can excite each rank guided mode of waveguide, when each rank guided mode is propagated in waveguide, because propagation constant is different, between guided mode, produce phase differential, interfere each other, on the ad-hoc location of certain condition, there will be one or more reflections of inputting light field meeting.Due to the periodicity of phase place, these reflections can repeat.In the present invention, multiple-mode interfence district is equivalent to play the effect of beam splitter and bundling device.When flashlight enters into the first multiple-mode interfence district 7 from the first input waveguide port one or the first input waveguide port 2, transmission through certain length, becoming two afterimage places evenly to export two-beam, this two bundles flashlight enters the second multiple-mode interfence district 8 through the transmission of Mach Zehnder interference arm respectively, transmission through equal length, at symmetrical delivery outlet Cheng Dan picture, in the second output waveguide port 4 or the first output waveguide port 3 outputs (intersection state); When control optical waveguide port 6 at the first control optical waveguide port 5 or second, add while controlling light beam, optical Kerr effect due to material, there is change in its refractive index, make to produce additional π (or odd-multiple of a π) phase differential through the light beam of Mach Zehnder interference arm transmission, after entering the second multiple-mode interfence district 8, from the first output waveguide port 3 or the second output waveguide port 4 outputs, switch is in straight-through state.When the first control optical waveguide port 5 and second, control optical waveguide port 6 and introduce and control the light time simultaneously, equally due to optical Kerr effect, flashlight is again from the second output waveguide port 4 or the first output waveguide port 3 outputs (intersection state).The present invention is based on MMI-MZI principle and optical kerr effect, with the control light of some strength, make switch operation, reach the object with light-operated light, and because the first control optical waveguide port 5 and second is controlled optical waveguide port 6 and is two and controls light input end mouths, can control respectively, realize dual control function.
With embodiment 1, difference is that the length in the first multiple-mode interfence district 7, the second multiple-mode interfence district 8 is 900 μ m.Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. multiple-mode interfence Mach-Zender dual control all-optical switch, comprise the first input waveguide port (1), the second input waveguide port (2), the first output waveguide port (3), the second output waveguide port (4), the first multiple-mode interfence district (7), the second multiple-mode interfence district (8) and Mach Zehnder interference arm (9), the first described input waveguide port (1), the second input waveguide port (2) is all connected to the one end in the first multiple-mode interfence district (7), the other end in the first multiple-mode interfence district (7) is connected with the one end in the second multiple-mode interfence district (8) by Mach Zehnder interference arm (9), the first described output waveguide port (3), the second output waveguide port (4) is connected to the other end in the second multiple-mode interfence district (8), it is characterized in that, also comprise the first control optical waveguide port (5), second controls optical waveguide port (6), the first wave filter (10) and the second wave filter (11), the first described control optical waveguide port (5), second controls optical waveguide port (6) is all connected with Mach Zehnder interference arm (9), in the first described multiple-mode interfence district (7), the second multiple-mode interfence district (8), be equipped with multi-mode interference coupler, described the first wave filter (10), the second wave filter (11) lay respectively on the first output waveguide port (3), the second output waveguide port (4).
2. multiple-mode interfence Mach-Zender dual control all-optical switch according to claim 1, it is characterized in that, described Mach Zehnder interference arm (9) is tapered structure with junction, the first output waveguide port (3), the second output waveguide port (4) in the first multiple-mode interfence district (7), the second multiple-mode interfence district (8) with the junction in the second multiple-mode interfence district (8).
3. multiple-mode interfence Mach-Zender dual control all-optical switch according to claim 2, is characterized in that, the tapered angle value of described tapered structure is in the range of tolerable variance of two afterimage output terminal generation translations of multimode waveguide.
4. multiple-mode interfence Mach-Zender dual control all-optical switch according to claim 1, is characterized in that, the type of described the first wave filter (10), the second wave filter (11) is bandpass filter.
5. according to the multiple-mode interfence Mach-Zender dual control all-optical switch described in any one in claim 1-4, it is characterized in that, the first described multiple-mode interfence district (7), the second multiple-mode interfence district (8) equal in length, and length range is 890 μ m-900 μ m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111025469A (en) * | 2019-12-26 | 2020-04-17 | 华中科技大学 | Silicon-based multimode 3dB beam splitter based on multimode interference coupler |
| CN112817091A (en) * | 2021-01-05 | 2021-05-18 | 中国科学院半导体研究所 | Mach-Zehnder interferometer and multichannel coarse wavelength division multiplexer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025469A (en) * | 2019-12-26 | 2020-04-17 | 华中科技大学 | Silicon-based multimode 3dB beam splitter based on multimode interference coupler |
| CN111025469B (en) * | 2019-12-26 | 2020-12-18 | 华中科技大学 | Silicon-based multimode 3dB beam splitter based on multimode interference coupler |
| CN112817091A (en) * | 2021-01-05 | 2021-05-18 | 中国科学院半导体研究所 | Mach-Zehnder interferometer and multichannel coarse wavelength division multiplexer |
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