CN113031163A - Optical filter structure and optical filter - Google Patents
Optical filter structure and optical filter Download PDFInfo
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- CN113031163A CN113031163A CN202110278234.2A CN202110278234A CN113031163A CN 113031163 A CN113031163 A CN 113031163A CN 202110278234 A CN202110278234 A CN 202110278234A CN 113031163 A CN113031163 A CN 113031163A
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/2934—Fibre ring resonators, e.g. fibre coils
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
- G02B6/29338—Loop resonators
- G02B6/29343—Cascade of loop resonators
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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
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Integrated Circuits (AREA)
Abstract
The present disclosure provides an optical filter structure, comprising: the optical switch comprises a first output end and a second output end, and is used for receiving an optical signal and switching a transmission path of the optical signal; the micro-ring filtering unit is used for filtering an input optical signal; the wavelength division multiplexer is connected with the first output end of the optical switch and the output end of the micro-ring filtering unit and is used for synthesizing optical signals with different wavelengths and outputting the synthesized optical signals; and an intermediate optical waveguide connected to the second output terminal of the optical switch for directly outputting the optical signal. In addition, the present disclosure also provides an optical filter constructed by multistage cascade using the optical filter structure, which can flexibly tune a free spectral region.
Description
Technical Field
The present disclosure relates to the field of optical fiber communication, and more particularly, to an optical filter structure and an optical filter constructed by multistage cascade using the same.
Background
With the rapid increase in the amount of data in mobile terminals and data centers, the transmission of core networks and metropolitan area networks has become more dynamic, which requires more flexibility and intelligence in the communication network. Reconfigurable Optical Add/Drop multiplexers (ROADMs) are important components for implementing such flexible Optical communication networks, and Reconfigurable Optical Add/Drop multiplexers with a gridless characteristic are ideal devices in future flexible Optical networks.
The optical filter is used as a key unit of next generation ROADM, and besides the tunable characteristics of the existing research on wider central wavelength and filter bandwidth, the flexibility of the free spectral range is also an important index of the ROADM system. For example, optical filter structures such as Fiber Bragg Gratings (FBGs), Mach Zehnder (MZ), micro-ring resonators (MRRs) can be tunable in filter bandwidth, but cannot be adjusted in the free spectral range.
In the process of implementing the present disclosure, it is found that the filter structure in the prior art scheme has the problem that the free spectral region is not tunable when being used alone, and the requirement of the ROADM system for flexibility of the free spectral region of the optical filter cannot be met.
Disclosure of Invention
In view of the above, the present disclosure provides an optical filter structure and an optical filter constructed by multistage cascade using the same.
One aspect of the present disclosure provides an optical filter structure, including: the optical switch, the micro-ring filter unit, the wavelength division multiplexer and the intermediate optical waveguide. The optical switch comprises a first output end and a second output end, and is used for receiving an optical signal and switching a transmission path of the optical signal; the micro-ring filtering unit is used for filtering an input optical signal; a wavelength division multiplexer connected to the first output terminal of the optical switch and the output terminal of the micro-ring filter unit, and configured to synthesize optical signals with different wavelengths and output the synthesized optical signals; and an intermediate optical waveguide connected to the second output terminal of the optical switch for directly outputting the optical signal.
According to an embodiment of the present disclosure, the optical switch includes a directional coupling type optical switch or an MZI type optical switch.
According to an embodiment of the present disclosure, the micro-loop filter unit includes: the waveguide comprises a ring-shaped resonant cavity, a first straight waveguide, a second straight waveguide and a bent waveguide. A ring resonator for separating the input optical signal into a first optical signal at a resonant wavelength of the ring resonator and a second optical signal at a non-resonant wavelength; a first straight waveguide for outputting the first optical signal; a second straight waveguide for outputting the second optical signal; and a bent waveguide connected to the wavelength division multiplexer and the first waveguide, for inputting the first optical signal to the wavelength division multiplexer; wherein the first straight waveguide and the second straight waveguide are parallel to each other; the microring resonator is equidistant from the first straight waveguide and the second straight waveguide.
According to an embodiment of the present disclosure, a relationship between a resonant wavelength of the ring resonator and a radius of the ring resonator is as shown in formula (1):
in formula (1), m represents the number of resonance stages; lambda [ alpha ]mRepresents the resonance wavelength; nc represents the effective refractive index of the ring resonator; r represents the radius of the ring resonator.
According to an embodiment of the present disclosure, the above wavelength division multiplexer includes an MZI type wavelength division multiplexer or an AWG type wavelength division multiplexer.
Another aspect of the present disclosure provides an optical filter constructed by a multistage cascade using the optical filter structure, including: the optical filter comprises an input optical waveguide, an input filtering unit, a multi-stage optical filter structure and an output unit. The optical signal processing device comprises an input optical waveguide, an output optical waveguide and an input filtering unit, wherein the input optical waveguide is used for transmitting an optical signal to be processed to the input filtering unit; the input filter unit is configured to divide the optical signal to be processed into a resonant optical signal and a non-resonant optical signal by filtering, input the resonant optical signal into the optical switch of the 1 st-stage optical filter structure, and input the non-resonant optical signal into the micro-ring filter unit of the 1 st-stage optical filter structure; a plurality of stages of the above optical filter structure; the output unit is used for outputting the optical signal after filtering processing; wherein, the input filter unit and the micro-ring filter unit of the 1 st level of the optical filter structure have the same structure.
According to the embodiment of the disclosure, the ring resonators of the multi-stage optical filter structure have different radiuses and the same waveguide width and waveguide thickness.
According to the embodiment of the present disclosure, the relationship between the radii of the ring resonators of the multi-stage optical filter structure is as shown in formula (2):
R＝2k-1×r (2)
in formula (2), R represents the radius of the ring resonator of the k-th order optical filter structure; r denotes the radius of the ring resonator of the 1 st order optical filter structure described above.
According to an embodiment of the present disclosure, a control signal of the optical switch of the multi-stage optical filter structure is as shown in equation (3):
in equation (3), sign (x) ═ 1 indicates that an optical signal in the optical switch of the x-th order optical filter structure is output through the first output terminal of the optical switch; sign (x) 0 indicates that the optical signal in the optical switch of the x-th order optical filter configuration is output through the second output terminal of the optical switch.
According to the embodiment of the present disclosure, the optical filter is manufactured on a lithium niobate, silicon dioxide, indium phosphide or gallium arsenide platform by a semiconductor process.
According to the embodiment of the disclosure, reconfigurable optical filtering and tunable free spectral range are realized by selecting paths through an optical switch and combining waves through a wavelength division multiplexer, and the requirement of a ROADM system on flexibility of the free spectral range of an optical filter is further met.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:
FIG. 1 schematically illustrates a schematic diagram of an optical filter structure 100 according to an embodiment of the disclosure;
fig. 2a and 2b show schematic diagrams of an optical switch 110 in an optical filter structure 100 according to an embodiment of the present disclosure;
fig. 3 schematically illustrates a schematic diagram of a micro-loop filtering unit 120 according to an embodiment of the present disclosure;
fig. 4 schematically illustrates a schematic diagram of an optical filter according to an embodiment of the present disclosure.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, steps, operations, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, or components.
All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.
Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B and C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a system having at least one of A, B or C" would include but not be limited to systems that have a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).
Embodiments of the present disclosure provide an optical filter structure and an optical filter constructed by multi-stage cascade using the same. Wherein, this optical filter structure includes: the optical switch comprises a first output end and a second output end, and is used for receiving an optical signal and switching a transmission path of the optical signal; the micro-ring filtering unit is used for filtering an input optical signal; the wavelength division multiplexer is connected with the first output end of the optical switch and the output end of the micro-ring filtering unit and is used for synthesizing optical signals with different wavelengths and outputting the synthesized optical signals; and an intermediate optical waveguide connected to the second output terminal of the optical switch for directly outputting the optical signal.
Fig. 1 schematically illustrates a schematic diagram of an optical filter structure 100 according to an embodiment of the disclosure.
As shown in fig. 1, the optical filter structure 100 includes an optical switch 110, a micro-ring filter unit 120, a wavelength division multiplexer 130, and an intermediate optical waveguide 140.
The optical switch 110 comprises a first output 111, a second output 112 and two inputs, whereby the optical signal has 4 transmission paths in the optical switch. Specifically, the optical signal may enter the optical switch 110 through any one of two input terminals of the optical switch 110, and be output through the first output terminal 111 or the second output terminal 112 according to the switching of the optical switch 110. The optical switch 110 may be a 2 × 2 optical switch used in this embodiment, and when the input path of the optical switch 110 is unique, the optical switch 110 may also be a 2 × 1 optical switch, which reduces the complexity of the optical path and reduces the interference of stray light on the optical signal.
The micro-loop filter unit 120 may be used to filter the input optical signal.
The wavelength division multiplexer 130 includes two input terminals, one of which is connected to the first output terminal 111 of the optical switch 110, and the other of which is connected to the output terminal of the micro-ring filter unit 120. The wavelength division multiplexer 130 may combine the optical signals with different wavelengths received by the two input terminals into one beam and transmit the beam along a single optical medium.
The wavelength division multiplexer 130 includes four structure types of a fused tapered type, a dielectric film type, a grating type, and a planar type, and specifically, in the embodiment of the present disclosure, an MZI type wavelength division multiplexer or an AWG type wavelength division multiplexer is employed.
The intermediate optical waveguide 140 is connected to the second output terminal 112 of the optical switch 110 for outputting the optical signal that has not passed through the wavelength division multiplexer 130.
According to the embodiment of the disclosure, the optical filter structure can realize reconfigurable optical filtering through the selection of the optical switch on the path and the wave combination of the wavelength division multiplexer, and provides a basic structure with high flexibility and easy control for the design of the optical filter.
Referring now to fig. 2a, 2b and 3, the optical filter structure 100 shown in fig. 1 will be further described with reference to specific embodiments.
Fig. 2a and 2b show schematic diagrams of an optical switch 110 in an optical filter structure 100 according to an embodiment of the present disclosure.
As shown in fig. 2a and 2b, the optical switch 110 can be selected according to the type of the optical switch that can be modulated, for example, in the case of modulating the optical switch by the electro-optical effect, the optical switch 110 can be selected from a directional coupling type optical switch, an MZI type optical switch, a Y-branch type optical switch, an SOA optical gate type optical switch, and the like; when the optical switch is modulated by the thermo-optical effect, the optical switch 110 may be selected from an MZI type optical switch, a 3dB directional coupling type optical switch, a thermo-optical digital Y-branch type optical switch, and the like. Preferably, in the embodiment of the present disclosure, the optical switch 110 may be a directional coupling type optical switch or an MZI type optical switch, and the function of the optical switch 110 may also be implemented by a thermo-optic effect or an electro-optic effect.
Fig. 3 schematically illustrates a schematic diagram of a micro-loop filtering unit 120 according to an embodiment of the present disclosure.
As shown in fig. 3, the micro-ring filter unit 120 includes a first straight waveguide 121, a second straight waveguide 122, a ring resonator 123, and a curved waveguide 124.
The first straight waveguide 121 includes an upload end 1211 and a download end 1212, and the second straight waveguide 122 includes an input end 1221 and a straight end 1222. The first straight waveguide 121 and the second straight waveguide 122 are parallel to each other, and the first straight waveguide 121 and the second straight waveguide 122 are equidistant from the ring cavity 123.
The ring resonator 123 may separate an optical signal input from the input terminal 1211 according to a wavelength thereof, output a first optical signal at a resonant wavelength of the ring resonator 123 through the drop terminal 1212, and output a second optical signal at a non-resonant wavelength through the through terminal 1222.
The ring resonator 123 has a periodic resonant wavelength, and the relationship between the resonant wavelength and the radius of the ring resonator 123 is shown in formula (1):
in formula (1), m represents the number of resonance stages; lambda [ alpha ]mRepresents the resonant wavelength of the ring resonator 123; n iscRepresents the effective index of refraction of the ring cavity 123; r denotes the radius of the ring resonator 123.
The curved waveguide 124 is connected to the download end 1212 of the first straight waveguide 121 and may be used to transmit the first optical signal to the wavelength division multiplexer 130.
Fig. 4 schematically illustrates a schematic diagram of an optical filter according to an embodiment of the present disclosure.
As shown in fig. 4, the optical filter is constituted by a multistage optical filter structure 100 by cascade connection, the optical filter including: an input optical waveguide 410, an input filtering unit 420, an optical filter structure 100 and an output unit 430.
The input optical waveguide 410 includes a straight waveguide connected to an input end of the input filter unit 420, and transmits an optical signal to be processed to the input filter unit 420.
The input filtering unit 420 has a similar structure to the micro-ring filtering unit 120 in the optical filter structure 100, and specifically, the input filtering unit 420 is the same as the micro-ring filtering unit 120 of the 1 st order optical filter structure 100.
The input filtering unit 420 is configured to divide the optical signal to be processed into a resonant optical signal and a non-resonant optical signal, where the resonant optical signal is transmitted to the optical switch 110 in the 1 st-stage optical filter structure 100, and the non-resonant optical signal is transmitted to the micro-ring filtering unit 120 in the 1 st-stage optical filter structure 100.
The optical filter of the embodiment of the present disclosure includes an N-th order optical filter structure 100, wherein the wavelength division multiplexing unit 130 of the kth order optical filter structure 100 is connected to one input terminal of the optical switch 110 of the (k + 1) th order optical filter structure 100, and the intermediate optical waveguide 140 of the kth order optical filter structure 100 is connected to the other input terminal of the optical switch 110 of the (k + 1) th order optical filter structure 100. Where N is a positive integer and k is a positive integer less than N.
The output unit 430 comprises a 2 x 1 output optical switch 431 and output optical waveguide 432. The output optical switch 431 may be the same type as the optical switch 110 of the optical filter structure 100. The output optical waveguide 432 may be used to output the filtered optical signal.
According to the embodiment of the disclosure, the optical filter realizes reconfigurable optical filtering and tunable free spectral range through the selection of the optical switch on the path and the wave combination of the wavelength division multiplexer, thereby meeting the requirement of the ROADM system on the flexibility of the free spectral range of the optical filter.
According to the embodiment of the present disclosure, the waveguide thickness and the waveguide width of the ring resonator 123 of each stage of the optical filter structure 100 in the optical filter are the same, but have different radii, and the radii of the ring resonators 123 of each stage of the optical filter structure 100 satisfy the following relationship:
R＝2k-1×r (2)
in formula (2), R represents the radius of the ring resonator of the kth-order optical filter structure; r denotes the radius of the ring cavity 123 of the 1 st order optical filter structure. The radius of the ring cavity 123 of the input filter unit 420 is also r.
According to the embodiment of the disclosure, the number k of wavelength division multiplexers through which the optical path passes can be determined by adjusting the switching of the optical switches, wherein the control signal of the optical switches is as shown in formula (3):
in equation (3), sign (x) ═ 1 indicates that the optical signal in the optical switch 110 of the x-th order optical filter structure 100 is output through the first output terminal of the optical switch 110; sign (x) ═ 0 indicates that the optical signal in the optical switch 110 of the x-th order optical filter structure 100 is output through the second output terminal of the optical switch 110.
After the ring resonator 123 of each stage of the optical filter structure 100 is individually tuned by the thermo-optic effect or the photoelectric effect, the size of the free spectral range of the optical filter can be obtained, as shown in formula (4):
in the formula (4), fsr (k) represents the size of a free spectral region when passing through the k-stage wavelength division multiplexer 130; FSR (0) represents the size of the free spectral range after passing through the input filtering unit 420.
According to the embodiment of the present disclosure, all the units of the optical filter can be realized by semiconductor process fabrication on a lithium niobate, silicon dioxide, indium phosphide or gallium arsenide platform.
The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. An optical filter structure comprising:
an optical switch including a first output terminal and a second output terminal, the optical switch being configured to receive an optical signal and switch a transmission path of the optical signal;
the micro-ring filtering unit is used for filtering an input optical signal;
the wavelength division multiplexer is connected with the first output end of the optical switch and the output end of the micro-ring filtering unit and is used for synthesizing optical signals with different wavelengths and outputting the synthesized optical signals; and
and the intermediate optical waveguide is connected with the second output end of the optical switch and is used for directly outputting the optical signal.
2. The optical filter structure of claim 1, wherein the optical switch comprises a directional coupling type optical switch or a MZI type optical switch.
3. The optical filter structure of claim 1, wherein the micro-ring filter unit comprises:
a ring resonator for splitting the input optical signal into a first optical signal at a resonant wavelength of the ring resonator and a second optical signal at a non-resonant wavelength;
a first straight waveguide for outputting the first optical signal;
a second straight waveguide for outputting the second optical signal; and
a curved waveguide connected to the wavelength division multiplexer and the first waveguide for inputting the first optical signal to the wavelength division multiplexer;
wherein the first straight waveguide and the second straight waveguide are parallel to each other;
the distances between the annular resonant cavity and the first straight waveguide and the distance between the annular resonant cavity and the second straight waveguide are equal.
4. The optical filter structure according to claim 3, wherein the resonance wavelength of the ring resonator is related to the radius of the ring resonator as shown in equation (1):
in formula (1), m represents the number of resonance stages; lambda [ alpha ]mRepresenting the resonance wavelength; n iscRepresenting an effective refractive index of the ring resonator; r represents the radius of the ring resonator.
5. The optical filter structure according to claim 1, wherein the wavelength division multiplexer comprises a MZI type wavelength division multiplexer or an AWG type wavelength division multiplexer.
6. An optical filter constructed by a multistage cascade using the optical filter structure according to any one of claims 1 to 5, comprising:
the input optical waveguide is used for transmitting the optical signal to be processed to the input filtering unit;
the input filtering unit is configured to divide the optical signal to be processed into a resonant optical signal and a non-resonant optical signal through filtering, input the resonant optical signal into the optical switch of the 1 st-level optical filter structure, and input the non-resonant optical signal into the micro-ring filtering unit of the 1 st-level optical filter structure;
a plurality of stages of the optical filter structure; and
the output unit is used for outputting the optical signal after filtering processing;
wherein the input filtering unit and the micro-ring filtering unit of the optical filter structure of the 1 st stage have the same structure.
7. The optical filter of claim 6 wherein the ring resonators of the multilevel optical filter structure have different radii and the same waveguide width and waveguide thickness.
8. The optical filter of claim 6, wherein the relationship between the radii of the ring resonators of the multi-stage optical filter structure is as shown in equation (2):
R＝2k-1×r (2)
in formula (2), R represents a radius of a ring resonator of the optical filter structure of the kth order; r denotes the radius of the ring resonator of the optical filter structure of order 1.
9. The optical filter of claim 6, wherein the control signal for the optical switch of the multi-stage optical filter structure is as shown in equation (3):
in equation (3), sign (x) ═ 1 indicates that an optical signal in an optical switch of the x-th order optical filter structure is output through a first output terminal of the optical switch; sign (x) ═ 0 indicates that the optical signal in the optical switch of the x-th order optical filter structure is output through the second output terminal of the optical switch.
10. The optical filter of claim 6 wherein the optical filter is fabricated by a semiconductor process on a lithium niobate, silicon dioxide, indium phosphide, or gallium arsenide platform.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433620A (en) * | 2021-08-26 | 2021-09-24 | 中国电子科技集团公司信息科学研究院 | Reconfigurable tunable optical filter |
| CN113466999A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院半导体研究所 | Optical filter and optical communication equipment using same |
| CN113466998A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院半导体研究所 | Tunable optical filter and optical communication equipment using same |
| CN113504610A (en) * | 2021-07-06 | 2021-10-15 | 中国科学院半导体研究所 | High roll-off optical filter |
| CN113572563A (en) * | 2021-06-30 | 2021-10-29 | 中山大学 | Optical add-drop multiplexer for optical transmission channel scheduling |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840526Y (en) * | 2005-11-15 | 2006-11-22 | 上海未来宽带技术及应用工程研究中心有限公司 | Reconfigurating optical add/drop multiplexing device |
| CN101552648A (en) * | 2008-04-02 | 2009-10-07 | 中国科学院半导体研究所 | Reconfigurable optical add-drop multiplexer structure for realizing 16 channels with multiple orders |
| CN204203497U (en) * | 2014-10-16 | 2015-03-11 | 浙江大学 | A kind of wavelength of modular extendable and space All-optical routing device |
| CN107911189A (en) * | 2017-11-15 | 2018-04-13 | 西南交通大学 | Light carrier radio communication beam size enlargement apparatus and its method based on array waveguide grating |
| CN110492207A (en) * | 2019-09-26 | 2019-11-22 | 西南应用磁学研究所 | The global multiple coupled switching resonance circuit of gyromagnetic filter |
| CN110945807A (en) * | 2018-04-02 | 2020-03-31 | 华为技术有限公司 | Optical add/drop multiplexer and optical signal transmission method |
| CN111865471A (en) * | 2019-04-30 | 2020-10-30 | 华为技术有限公司 | Optical add/drop multiplexer and control method thereof |
| CN111947780A (en) * | 2020-07-30 | 2020-11-17 | 上海交通大学 | Fourier transform spectrometer on silicon substrate and method for obtaining light source reconstruction spectrum |
| CN112180513A (en) * | 2020-09-30 | 2021-01-05 | 华中科技大学 | Reconfigurable optical filter based on micro-ring array |
-
2021
- 2021-03-15 CN CN202110278234.2A patent/CN113031163B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840526Y (en) * | 2005-11-15 | 2006-11-22 | 上海未来宽带技术及应用工程研究中心有限公司 | Reconfigurating optical add/drop multiplexing device |
| CN101552648A (en) * | 2008-04-02 | 2009-10-07 | 中国科学院半导体研究所 | Reconfigurable optical add-drop multiplexer structure for realizing 16 channels with multiple orders |
| CN204203497U (en) * | 2014-10-16 | 2015-03-11 | 浙江大学 | A kind of wavelength of modular extendable and space All-optical routing device |
| CN107911189A (en) * | 2017-11-15 | 2018-04-13 | 西南交通大学 | Light carrier radio communication beam size enlargement apparatus and its method based on array waveguide grating |
| CN110945807A (en) * | 2018-04-02 | 2020-03-31 | 华为技术有限公司 | Optical add/drop multiplexer and optical signal transmission method |
| CN111865471A (en) * | 2019-04-30 | 2020-10-30 | 华为技术有限公司 | Optical add/drop multiplexer and control method thereof |
| CN110492207A (en) * | 2019-09-26 | 2019-11-22 | 西南应用磁学研究所 | The global multiple coupled switching resonance circuit of gyromagnetic filter |
| CN111947780A (en) * | 2020-07-30 | 2020-11-17 | 上海交通大学 | Fourier transform spectrometer on silicon substrate and method for obtaining light source reconstruction spectrum |
| CN112180513A (en) * | 2020-09-30 | 2021-01-05 | 华中科技大学 | Reconfigurable optical filter based on micro-ring array |
Non-Patent Citations (1)
| Title |
|---|
| 姜新红: "基于硅基微谐振器的光滤波器和光开关研究", 《中国优秀博士学位论文全文数据库》 * |
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| CN113572563A (en) * | 2021-06-30 | 2021-10-29 | 中山大学 | Optical add-drop multiplexer for optical transmission channel scheduling |
| CN113572563B (en) * | 2021-06-30 | 2022-06-21 | 中山大学 | Optical add-drop multiplexer for optical transmission channel scheduling |
| CN113466999A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院半导体研究所 | Optical filter and optical communication equipment using same |
| CN113466998A (en) * | 2021-07-06 | 2021-10-01 | 中国科学院半导体研究所 | Tunable optical filter and optical communication equipment using same |
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| CN113433620A (en) * | 2021-08-26 | 2021-09-24 | 中国电子科技集团公司信息科学研究院 | Reconfigurable tunable optical filter |
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