US 12,335,029 B1
Coherent light receiving optical device
Fan Qi, Beijing (CN); Chang Liu, Beijing (CN); Zhou Fang, Beijing (CN); and Pengfei Cai, Beijing (CN)
Assigned to SiFotonics Technologies (Beijing) Co., Ltd., Beijing (CN)
Filed by SiFotonics Technologies (Beijing) Co., Ltd., Beijing (CN)
Filed on Aug. 5, 2024, as Appl. No. 18/794,785.
Claims priority of application No. 202410247498.5 (CN), filed on Mar. 5, 2024.
Int. Cl. H04B 10/60 (2013.01); H04B 10/61 (2013.01); H04J 14/02 (2006.01)
CPC H04J 14/0212 (2013.01) [H04B 10/614 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A coherent light receiving optical device, wherein the coherent light receiving optical device comprises:
an optical switch group in a signal path, the optical switch group comprises three optical switches, wherein a first signal light is outputted as a first band signal light and a second band signal light of the first signal light after passing through a first optical switch of the three optical switches, a second signal light is outputted as a first band signal light and a second band signal light of the second signal light after passing through a second optical switch of the three optical switches; and a third optical switch of the three optical switches is configured to output as a first band oscillation light and a second band oscillation light after an oscillation light passes through it;
a 1×2 power beam splitter group in an oscillation path, the 1×2 power beam splitter group comprises two 1×2 power beam splitters, one of which splits the first band oscillation light outputted by the third optical switch into two first band split oscillation lights and the other of which splits the second band oscillation light outputted by the third optical switch into two second band split oscillation lights;
an optical hybrid group, the optical hybrid group comprises two first band optical hybrids and two second band optical hybrids, wherein each of the two first band optical hybrids is configured to mix each of the said two first band split oscillation lights from the oscillation path with a corresponding one of said first band signal lights of the first signal light and said first band signal light of the second signal light from the signal path and then output a first band mixed light, and each of the two second band optical hybrids is configured to mix each of the two second band split oscillation lights from the oscillation path with a corresponding one of said second band signal lights of the first signal light and said second band signal light of the second signal light from the signal path and then output a second band mixed light;
a detector group, each detector of the detector group is used to convert the first band mixed light and the second band mixed light into the photocurrent in the same detector so as to multiplex the detector.