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CN-224216905-U - Integrated wave combining and dividing device

CN224216905UCN 224216905 UCN224216905 UCN 224216905UCN-224216905-U

Abstract

The utility model provides an integrated wave combining and dividing device which comprises a substrate, a lower cladding layer and a waveguide, wherein the lower cladding layer is arranged on the substrate, the waveguide is arranged on the lower cladding layer, a planar waveguide light path is etched on the waveguide, the planar waveguide light path comprises a first light path and a second light path, the first light path comprises a plurality of first light-in light paths, a wave combining light path and a first light-out light path, one ends of the first light-in light paths extend to the end face of the waveguide, the other ends of the first light-in light paths are connected with one ends of the first light-out light paths through the first wave combining light paths, the second light path comprises a second light-in light path, a wave dividing light path and a plurality of second light-out light paths, one ends of the second light-in light paths extend to the end face of the waveguide, the other ends of the second light-in light paths are connected with one ends of the second light-out light paths through the wave dividing light paths, and all devices on the light paths are integrated on the substrate in a waveguide etching mode, so that the integrated level is improved, and meanwhile the cost light path loss is reduced.

Inventors

  • XU XIAOHUI
  • HU YI
  • ZHANG JI
  • WU FAN
  • LUO YONG
  • JIAO LEI

Assignees

  • 武汉光迅科技股份有限公司

Dates

Publication Date
20260508
Application Date
20250604

Claims (10)

  1. 1. The integrated multiplexer/demultiplexer is characterized by comprising a substrate (1), a lower cladding layer (2) and a waveguide layer (3) which are arranged in a stacked manner, wherein: A planar waveguide light path is etched on the waveguide layer (3), and comprises a first light path (4) and a second light path (5); the first optical path (4) comprises a plurality of first light-in waveguides (41), a wave-combining optical path (42) and a first light-out optical path (43), one ends of the plurality of first light-in waveguides (41) extend to the end face of the waveguide layer (3), the other ends of the plurality of first light-in waveguides (41) are connected with one end of the first light-out optical path (43) through the wave-combining optical path (42), and the other ends of the first light-out optical paths (43) extend to the end face of the waveguide layer (3); The second optical path (5) comprises a second light-in waveguide (51), a beam-splitting optical path (52) and a plurality of second light-out optical paths (53), one end of the second light-in waveguide (51) extends to the end face of the waveguide layer (3), the other end of the second light-in waveguide (51) is connected with one ends of the plurality of second light-out optical paths (53) through the beam-splitting optical path (52), and the other ends of the plurality of second light-out optical paths (53) extend to the end face of the waveguide layer (3).
  2. 2. The integrated combiner-divider according to claim 1, characterized in that said first optical path (4) further comprises a plurality of optical attenuation units (46), each of said optical attenuation units (46) being located between a respective first optical input waveguide (41) and said combiner-optical path (42); One end of the optical attenuation unit (46) is connected with the corresponding first light-entering waveguide (41), and the other end of the optical attenuation unit (46) is connected with the combined-wave optical path (42).
  3. 3. The integrated combiner-divider according to claim 1, characterized in that the combining optical path (42) comprises a plurality of first splitters (421), the plurality of first splitters (421) being cascaded in an optical transmission direction; the first branching unit (421) comprises a first main path (421A) and at least two first branch paths (421B), and the first main path (421A) is connected with the two first branch paths (421B); The first branch circuit (421B) of the first-stage first branching unit (421) is connected with the corresponding first light-in waveguide (41), and the first main circuit (421A) of the last-stage first branching unit (421) is connected with the first light-out path (43); For the other first splitters (421) than the first stage first splitter (421) and the last stage first splitter (421), the first branch (421B) of the corresponding first splitter (421) is connected to the first trunk (421A) of the first splitter (421) of the preceding stage, and the first trunk (421A) of the corresponding first splitter (421) is connected to the first branch (421B) of the first splitter (421) of the following stage.
  4. 4. The integrated combiner-divider according to claim 1, characterized in that the first optical path (4) further comprises a second splitter (44) and a first PD (45), wherein: The input end of the second splitter (44) is connected with the combined wave optical path (42), one output end of the second splitter (44) is connected with the first light-out path (43), and the other output end of the second splitter (44) is coupled with the first PD (45).
  5. 5. The integrated combiner-divider according to claim 1, characterized in that the beam-dividing optical path (52) comprises a plurality of third splitters (521), the plurality of third splitters (521) being cascaded in the optical transmission direction; The third branching unit (521) comprises a second trunk (521A) and two second branches (521B), and the second trunk (521A) is connected to the two second branches (521B); The second main path (521A) of the first-stage third splitter (521) is connected with the second light-in waveguide (51), and the second branch path (521B) of the last-stage third splitter (521) is connected with the corresponding second light-out path (53); For the other third splitters (521) except the first stage third splitter (521) and the last stage third splitter (521), the second trunk (521A) of the corresponding third splitter (521) is connected to the second trunk (521B) of the third splitter (521) of the previous stage, and the second trunk (521B) of the corresponding third splitter (521) is connected to the second trunk (521A) of the third splitter (521) of the next stage.
  6. 6. The integrated combiner-divider according to claim 1, characterized in that the second optical path (5) further comprises a first filter (54) and a second filter (55), wherein: The input end of the first filter (54) is connected with the second light-in waveguide (51), one output end of the first filter (54) is connected with the branching light path (52), the other output end of the first filter (54) is connected with the input end of the second filter (55), and the output end of the second filter (55) extends to the end face of the waveguide layer (3) and is coupled with an external receiver.
  7. 7. The integrated combiner-divider according to claim 6, characterized in that the second optical path (5) further comprises a fourth splitter (56), wherein: the input end of the fourth splitter (56) is connected with one of the output ends of the first filter (54), one of the output ends of the fourth splitter (56) is connected with the branching optical path (52), and the other output end of the fourth splitter (56) extends to the end face of the waveguide layer (3) and is coupled with an external receiver.
  8. 8. The integrated combiner-divider according to claim 7, characterized in that the second optical path (5) further comprises a fifth splitter (57) and a second PD (58), wherein: The input end of the fifth splitter (57) is connected with one output end of the fourth splitter (56), one output end of the fifth splitter (57) is coupled with the second PD (58), and the other output end of the fifth splitter (57) extends to the end face of the waveguide layer (3) and is coupled with an external receiver.
  9. 9. The integrated multiplexer/demultiplexer according to claim 8, wherein the waveguide layer (3) is provided with an upper cladding layer (6).
  10. 10. The integrated multiplexer/demultiplexer according to claim 9, wherein the upper cladding layer (6), the waveguide layer (3) and the lower cladding layer (2) are etched with a fixing groove (7) at the same position, and the second PD (58) is disposed in the fixing groove (7); The optical path of one of the output ends of the fifth splitter (57) extends into the fixing groove (7) and is coupled with the second PD (58).

Description

Integrated wave combining and dividing device Technical Field The utility model relates to the technical field of optical communication, in particular to an integrated combiner-divider. Background The pooling wavelength division is a new technical concept of metro wavelength division, and aims to carry out resource pooling sharing on transmission signal wavelengths in a metro convergence layer and an access layer of an optical transmission network, so that the wavelengths of the optical signals can be flexibly distributed and scheduled. The wave combining and dividing device is a key component for pooling wave division, the current key complaints are high integration level and low cost, but the current wave combining and dividing device uses more discrete devices, is complex to produce and assemble, has larger volume of the whole device, and is not beneficial to popularization and use of the wave combining and dividing device. In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art. Disclosure of utility model The utility model aims at improving the integration level of the multiplexer/demultiplexer and reducing the cost. In a first aspect, there is provided an integrated multiplexer/demultiplexer comprising a substrate 1, a lower cladding layer 2 and a waveguide layer 3, which are stacked, wherein: A planar waveguide light path is etched on the waveguide layer 3, and the planar waveguide light path comprises a first light path 4 and a second light path 5; The first optical path 4 includes a plurality of first light-in waveguides 41, a wave-combining optical path 42 and a first light-out optical path 43, one end of the plurality of first light-in waveguides 41 extends to the end face of the waveguide layer 3, the other end of the plurality of first light-in waveguides 41 is connected with one end of the first light-out optical path 43 through the wave-combining optical path 42, and the other end of the first light-out optical path 43 extends to the end face of the waveguide layer 3; The second optical path 5 includes a second light-in waveguide 51, a beam-splitting optical path 52, and a plurality of second light-out optical paths 53, one end of the second light-in waveguide 51 extends to the end face of the waveguide layer 3, the other end of the second light-in waveguide 51 is connected to one end of the plurality of second light-out optical paths 53 through the beam-splitting optical path 52, and the other ends of the plurality of second light-out optical paths 53 extend to the end face of the waveguide layer 3. Preferably, the first optical path 4 further includes a plurality of optical attenuation units 46, and each optical attenuation unit 46 is located between the corresponding first optical input waveguide 41 and the combined optical path 42; one end of the optical attenuation unit 46 is connected to the corresponding first optical input waveguide 41, and the other end of the optical attenuation unit 46 is connected to the combined-wave optical path 42. Preferably, the combining optical path 42 includes a plurality of first splitters 421, and the plurality of first splitters 421 are cascaded along the optical transmission direction; The first splitter 421 includes a first trunk 421A and at least two first branches 421B, and the first trunk 421A is connected to the two first branches 421B; The first branch 421B of the first stage first splitter 421 is connected to the corresponding first input optical waveguide 41, and the first trunk 421A of the last stage first splitter 421 is connected to the first output optical path 43; For the other first splitters 421 except for the first stage first splitter 421 and the last stage first splitter 421, the first branch 421B of the corresponding first splitter 421 is connected to the first trunk 421A of the first splitter 421 of the previous stage, and the first trunk 421A of the corresponding first splitter 421 is connected to the first branch 421B of the first splitter 421 of the next stage. Preferably, the first optical path 4 further includes a second splitter 44 and a first PD45, wherein: an input end of the second splitter 44 is connected to the combined optical path 42, one output end of the second splitter 44 is connected to the first output optical path 43, and another output end of the second splitter 44 is coupled to the first PD 45. Preferably, the optical branching path 52 includes a plurality of third splitters 521, and the plurality of third splitters 521 are cascaded along the optical transmission direction; The third splitter 521 includes a second trunk 521A and two second branches 521B, where the second trunk 521A is connected to the two second branches 521B; The second main path 521A of the first third splitter 521 is connected to the second input optical waveguide 51, and the second branch path 521B of the last third splitter 521 is connected to the corresponding second output optical path 53; For the o