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

Claim 8:
9. 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 quarter-wave mirror and a second quarter-wave mirror; the first long-arm optical fiber, the first short-arm optical fiber, the second long-arm optical fiber and the second short-arm optical fiber are all polarization-maintaining optical fibers;
each of the first quarter-wave mirror and the second quarter-wave mirror comprises a quarter-wave plate and a reflector, an angle between a main axis of the quarter-waver plate and a horizontal direction is 45°, the first quarter-wave mirror and the second quarter-wave mirror are respectively configured to reflect an input optical signal, such that a horizontal polarization component and a vertical polarization component of the input optical signal are respectively rotated to be a vertical polarization component and a horizontal polarization component.