公开(公告)号：US11862925B2

公开(公告)日：2024-01-02

申请号：US17277305

申请日：2018-10-30

Applicant: SOUTH CHINA UNIVERSITY OF TECHNOLOGY

Inventor： Shanhui Xu ,  Qilai Zhao ,  Zhitao Zhang ,  Changsheng Yang ,  Zhouming Feng ,  Zhongmin Yang

IPC: H01S3/13 ,  H01S3/08 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/10 ,  H01S3/16

CPC classification number: H01S3/1308 ,  H01S3/0675 ,  H01S3/06716 ,  H01S3/08013 ,  H01S3/08054 ,  H01S3/09415 ,  H01S3/094003 ,  H01S3/10061 ,  H01S3/1608 ,  H01S3/1618

Abstract: A tunable narrow-linewidth photo-generated microwave source based on polarization control includes a high-reflectivity fiber grating, a high-gain fiber, a low-reflectivity polarization-maintaining fiber grating, a stress adjusting device, a single-mode semiconductor pump laser, an optical wavelength division multiplexer, a polarization beam splitter, a polarization controller, an optical coupler, and a photoelectric detector. Birefringence distribution in the low-reflectivity polarization-maintaining fiber grating is controlled by adjusting a stress magnitude of the stress adjusting device to the low-reflectivity polarization fiber grating, thereby controlling a laser frequency working in different polarization modes in a resonant cavity, and a tunable narrow-linewidth photo-generated microwave source is generated by a beat-frequency technology using a dual-wavelength narrow-linewidth laser with variable frequency intervals.