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

Claim 10:
11. 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 first Sagnac ring composed of a fifteenth polarization beam splitter, a first 90° Faraday rotator and a second Sagnac ring composed of a sixteenth polarization beam splitter and a second 90° Faraday rotator;
two output ports of the fifteenth polarization beam splitter are respectively connected to the first 90° Faraday rotator by a polarization-maintaining fiber; two output ports of the sixteenth polarization beam splitter are respectively connected to the second 90° Faraday rotator by a polarization-maintaining fiber;
the first Sagnac ring and the second Sagnac ring are respectively configured to reflect an input optical signal, and to rotate a polarization state of the input optical signal by 90°.