阅读说明：本技术 光分插复用器及光信号处理方法 (Optical add/drop multiplexer and optical signal processing method ) 是由 米光灿 冀瑞强 李彦波 于 2018-10-10 设计创作，主要内容包括：本申请实施例提供了一种光分插复用器及光信号处理方法,涉及光通信技术领域。该光分插复用器包括：多个级联的滤波单元,每个滤波单元包括：两根端口波导,以及位于两根端口波导之间的多个微环。每根端口波导与多个微环中的一个微环耦合,每根端口波导与耦合的微环之间设置有TC,该TC用于调节端口波导与耦合的微环之间的耦合系数；每个滤波单元还包括：至少一个MEMS耦合器,每个MEMS耦合器用于调节多个微环中两个相邻的微环之间的耦合系数。每个滤波单元中的TC和MEMS耦合器用于将滤波单元的滤波谱型调节为目标滤波谱型,使得该光分插复用器能够下载/上载不同类型的滤波谱型的光信号。(The embodiment of the application provides an optical add-drop multiplexer and an optical signal processing method, and relates to the technical field of optical communication. The optical add/drop multiplexer includes: a plurality of cascaded filtering units, each filtering unit comprising: two port waveguides, and a plurality of microrings positioned between the two port waveguides. Each port waveguide is coupled with one of the micro-rings, a TC is arranged between each port waveguide and the coupled micro-ring, and the TC is used for adjusting the coupling coefficient between the port waveguide and the coupled micro-ring; each filtering unit further includes: at least one MEMS coupler, each MEMS coupler for adjusting a coupling coefficient between two adjacent microrings of the plurality of microrings. The TC and MEMS couplers in each filtering unit are used to adjust the filtering spectral pattern of the filtering unit to a target filtering spectral pattern, so that the optical add/drop multiplexer can download/upload optical signals of different types of filtering spectral patterns.)

An optical add/drop multiplexer, comprising: a plurality of cascaded filtering units, wherein:

each of the filtering units includes: two port waveguides, and a plurality of microrings located between the two port waveguides;

each port waveguide is coupled with one of the micro-rings, a Tunable Coupler (TC) is arranged between each port waveguide and the coupled micro-ring, and the TC is used for adjusting a coupling coefficient between the port waveguide and the coupled micro-ring;

each of the filtering units further includes: at least one micro-electromechanical system (MEMS) coupler, each MEMS coupler for adjusting a coupling coefficient between two adjacent micro-rings of the plurality of micro-rings;

any two adjacent filtering units are connected through a port waveguide;

the TC and MEMS coupler in each filtering unit is used for adjusting the filtering spectrum type of the filtering unit to a target filtering spectrum type.

An optical add/drop multiplexer according to claim 1, wherein said two port waveguides comprise: a first port waveguide having an input port and a pass-through port, and a second port waveguide having a download port and an upload port;

the TC in each of the filtering units is further configured to: and controlling all optical signals input from the input port of the first port waveguide to be transmitted to the through port of the first port waveguide.

An optical add/drop multiplexer according to claim 1 or 2, wherein each two adjacent microrings of said plurality of microrings are coupled by a coupling waveguide in each said microring;

each of the MEMS couplers includes: a coupling waveguide in each of the two coupled micro-rings, and a displacement adjustment assembly;

at least one of the coupling waveguides of the two coupled micro-rings is a suspended waveguide;

the displacement adjusting component is used for controlling the suspended waveguide to move so as to adjust the coupling coefficient between the two coupled micro-rings.

An optical add/drop multiplexer according to claim 3, wherein said plurality of microrings are formed from deep or shallow waveguides.

An optical add/drop multiplexer according to claim 1 or 2, wherein each two adjacent microrings of said plurality of microrings are coupled by a coupling waveguide in each said microring;

each of the MEMS couplers includes: a coupling waveguide, a cantilever, and a displacement adjustment assembly in each of the two coupled micro-rings;

an orthographic projection of the cantilever on the two coupled micro-rings with an overlap region between each coupled waveguide in the two coupled micro-rings; or the orthographic projection of the cantilever on the two coupled micro-rings is positioned between the two coupled micro-rings;

the refractive index of the cantilever is greater than the refractive index of the filler between the two coupled microrings;

the displacement adjusting component is used for controlling the cantilever to move towards the direction close to or away from the coupling waveguide so as to adjust the coupling coefficient between the two coupled micro-rings.

An optical add/drop multiplexer according to any one of claims 2 to 5, further comprising: the input/output preprocessing unit and the plurality of converging/separating units are in one-to-one correspondence with the plurality of cascaded filtering units;

a first optical wave transmission port of the input/output preprocessing unit is connected with an input port of a first filtering unit, and a second optical wave transmission port of the input/output preprocessing unit is connected with a through port of a last filtering unit;

and the two optical wave transmission ports of each converging-separating unit are respectively connected with the uploading port and the downloading port of the corresponding filtering unit.

An optical add/drop multiplexer according to claim 6, wherein each said merged separating unit comprises: a first polarization beam splitting rotator PSR, a second PSR, a first input-output separator and a second input-output separator;

the first input-output separator and the second input-output separator are respectively provided with an input end, an output end and a light wave transmission port, and the first PSR and the second PSR are respectively provided with a light wave transmission port, a light wave splitting port and a light wave splitting rotation port;

for each of said merged separating units:

the input port of the first input/output separator is connected with the upload port of the corresponding filter unit, the output port of the first input/output separator is connected with the optical wave splitting port of the first PSR, the optical wave transmission port of the first input/output separator is connected with the optical wave splitting rotary port of the second PSR,

the input port of the second input/output separator is connected with the download port of the corresponding filter unit, the output port of the second input/output separator is connected with the optical wave splitting rotary port of the first PSR, and the optical wave transmission port of the second input/output separator is connected with the optical wave splitting port of the second PSR.

An optical add/drop multiplexer according to claim 6, wherein said input/output preprocessing unit comprises: a third input-output separator, a fourth input-output separator, a third PSR and a fourth PSR;

the third input-output separator and the fourth input-output separator are respectively provided with an input end, an output end and a light wave transmission end, and the third PSR and the fourth PSR are respectively provided with a light wave transmission port, a light wave splitting port and a light wave splitting rotation end;

an input port of the third input/output separator is connected to an input port of the first filter unit, an output port of the third input/output separator is connected to an optical wave splitting port of the fourth PSR, an optical wave transmission port of the third input/output separator is connected to an optical wave splitting rotation port of the third PSR,

an input port of the fourth input/output separator is connected with the through port of the last filtering unit, an output port of the fourth input/output separator is connected with the optical wave splitting rotary port of the fourth PSR, and an optical wave transmission port of the fourth input/output separator is connected with the optical wave splitting port of the third PSR.

An optical add/drop multiplexer according to any one of claims 6 to 8, wherein said plurality of cascaded filtering units and said plurality of merging/splitting units are adapted to implement optical signal upload and download for a plurality of channels, in each of said channels:

when the channel is in the optical signal downloading state, the input/output preprocessing unit is used for processing the input optical signal into Q_TEAnd P_TEAnd Q obtained after the treatment_TEAnd P_TETo said plurality of cascaded filtering units, Q_TEOptical signal, P, representing transverse electric field TE mode_TEAn optical signal representing a transverse magnetic field TM mode is rotated to an optical signal of a TE mode;

the filtering unit is used for converting the Q_TEFirst Q of a specified wavelength_TEAnd applying said P_TEFirst P of a specified wavelength_TETransmitting to a corresponding converging-separating unit;

the confluence separation unit is used for receiving the first Q_TEAnd said first P_TEPerforming convergence processing and outputting;

the merging/separating unit is used for processing the input optical signal into a second Q when the channel is in the optical signal loading state_TEAnd a second P_TEAnd said second Q is_TEAnd said second P_TEAnd transmitting the data to the input and output preprocessing unit through a corresponding channel.

An optical add/drop multiplexer according to any one of claims 2 to 5, further comprising: the device comprises another group of a plurality of cascaded filtering units, an input and output preprocessing unit, a plurality of separation units and a plurality of convergence units, wherein the plurality of separation units, the plurality of convergence units, the one group of the plurality of cascaded filtering units and the other group of the plurality of cascaded filtering units are in one-to-one correspondence;

the first optical wave transmission port of the input and output preprocessing unit is respectively connected with the input port of the first filtering unit in one group of the plurality of cascaded filtering units and the input port of the first filtering unit in the other group of the plurality of cascaded filtering units,

the second optical wave transmission port of the input/output preprocessing unit is respectively connected with the through port of the last filtering unit in one group of the plurality of cascaded filtering units and the through port of the last filtering unit in the other group of the plurality of cascaded filtering units;

the optical wave transmission port of each converging unit is respectively connected with the download port of the corresponding filtering unit in one group of the plurality of cascaded filtering units and the download port of the corresponding filtering unit in the other group of the plurality of cascaded filtering units;

the optical wave transmission port of each separation unit is respectively connected with the upload port of the corresponding filtering unit in one group of the plurality of cascaded filtering units and the upload port of the corresponding filtering unit in the other group of the plurality of cascaded filtering units.

An optical add/drop multiplexer according to claim 10, wherein said input/output preprocessing unit comprises: a first light wave beam splitter (PBS) and a second PBS;

the first PBS and the second PBS are provided with an optical wave transmission port, a first optical wave beam splitting port and a second optical wave beam splitting port;

the first PBS having a first lightwave splitting port coupled to an input port of a first one of the set of the plurality of cascaded filtering units, the first PBS having a second lightwave splitting port coupled to an input port of a first one of the another set of the plurality of cascaded filtering units,

the first optical wave splitting port of the second PBS is connected to the through port in the last filtering unit of the one set of the plurality of cascaded filtering units, and the second optical wave splitting port of the second PBS is connected to the through port in the last filtering unit of the other set of the plurality of cascaded filtering units.

An optical add/drop multiplexer according to claim 10, wherein each said merging unit comprises a third PBS and each said splitting unit comprises a fourth PBS;

the third PBS and the fourth PBS are provided with an optical wave transmission port, a first optical wave splitting port and a second optical wave splitting port;

the first optical wave beam splitting port of the third PBS is connected with the download port of the corresponding filtering unit in one group of the plurality of cascaded filtering units, and the second optical wave beam splitting port of the third PBS is connected with the download port of the corresponding filtering unit in the other group of the plurality of cascaded filtering units;

the first optical splitter port of the fourth PBS is connected to the upload port of the corresponding filtering unit in one set of the plurality of cascaded filtering units, and the second optical splitter port of the fourth PBS is connected to the upload port of the corresponding filtering unit in another set of the plurality of cascaded filtering units.

An optical add/drop multiplexer according to any one of claims 10 to 12, wherein two sets of a plurality of cascaded filtering units, said plurality of splitting units and said plurality of merging units are used to implement optical signal upload and download for a plurality of channels, in each of said channels:

when the channel is in the optical signal downloading state, the input/output preprocessing unit is used for processing the input optical signal into Q_TEAnd P_TMAnd Q obtained after the treatment_TEAnd P_TMRespectively transmitted to the two groups of multiple cascaded filtering units, wherein Q_TEOptical signal representing TE mode, P_TMAn optical signal representing a TM mode;

a first filtering unit for filtering the Q_TEThird Q of the specified wavelength_TETransmitting to a corresponding converging unit;

a second filtering unit for filtering the P_TMThird P of the specified wavelength_TMTransmitting to a corresponding converging unit;

the corresponding merging unit is used for receiving the third Q_TEAnd said third P_TMMerging and outputting;

when the channel is in the optical signal loading state, the separation unit is used for processing the input optical signal into a fourth Q_TEAnd fourth P_TMAnd said fourth Q_TEAnd said fourth P_TMTransmitting the data to the input and output preprocessing unit through the channel;

the first filtering unit is one of the group of multiple cascaded filtering units, and the second filtering unit is a filtering unit corresponding to the first filtering unit in the other group of multiple filtering units.

An optical add/drop multiplexer according to claim 1, wherein each of said TCs comprises: the optical fiber coupler comprises a first sub-waveguide in the port waveguide, a second sub-waveguide in a micro-ring coupled with the port waveguide, and a first phase controller PS arranged on the first sub-waveguide, wherein the first PS is used for adjusting the phase difference between an optical signal transmitted in the first sub-waveguide and an optical signal transmitted in the second sub-waveguide.

An optical add/drop multiplexer according to claim 1, wherein a second PS is further provided on each microring for adjusting the resonant wavelength of the microring, wherein in each filtering unit there is no overlapping area for the second PS, the TC and the MEMS coupler.

An optical signal processing method applied to the optical add/drop multiplexer according to any one of claims 1 to 15, the method comprising:

adjusting the TC and MEMS couplers in each of the filtering units to adjust the filtering spectral pattern of the filtering unit to a target filtering spectral pattern.

The method of claim 16, wherein the two port waveguides comprise: a first port waveguide having an input port and a pass-through port, and a second port waveguide having a download port and an upload port;

the adjusting the TC and MEMS couplers in each of the filtering units to adjust the filtering spectrum pattern of the filtering unit to a target filtering spectrum pattern includes:

controlling a TC arranged between the first port waveguide and the coupled microring so that all optical signals input from an input port of the first port waveguide are transmitted to a through port of the first port waveguide;

controlling a TC disposed between the second port waveguide and the coupled microring to adjust a coupling coefficient between the second waveguide and the coupled microring, and controlling each of the MEMS couplers to adjust a coupling coefficient between two adjacent microrings of the plurality of microrings;

and controlling TC arranged between the first port waveguide and the coupled micro-ring to adjust a coupling coefficient between the first waveguide and the coupled micro-ring so as to adjust the filtering spectrum type of the filtering unit to a target filtering spectrum type.