Patent ID: 11923909
Assignee: BEIJING ZHONGKE GUOGUANG QUANTUM TECHNOLOGY CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 14:
15. The self-coherent receiver based on polarization-independent delay interferometers according to claim 2, wherein each of the first reflection module and the second reflection module comprises a fifth Sagnac ring composed of a nineteenth polarization beam splitter and a third 90° Faraday rotator;
two output ports of the nineteenth polarization beam splitter are respectively connected to the third 90° Faraday rotator by a polarization-maintaining fiber;
the fifth Sagnac ring is configured to reflect optical signals input through two paths, and to rotate polarization states of the optical signals input through two paths by 90° and output rotated optical signals from corresponding input ports.