公开(公告)号：US20240426640A1

公开(公告)日：2024-12-26

申请号：US18456144

申请日：2023-08-25

Applicant: SOUTHWEST JIAOTONG UNIVERSITY

Inventor： Lianshan Yan ,  Haijun He ,  Lin Jiang ,  Anlin Yi ,  Xihua Zou ,  Wei Pan

IPC: G01D5/353

Abstract: The present invention discloses an integrated system for optical fiber sensing and communication through sharing co-frequency resources. Specifically, the system consists of two parts: optical path detection and circuit demodulation. The entire system consists of a continuous wave laser, a fiber coupler, a polarization controller, a mach-zehnder modulator, an arbitrary waveform generator, an erbium-doped fiber amplifier, an optical filter, an optical fiber annular, an optical fiber, a photodetector, a data acquisition device, a balance detector and a data acquisition card. A transmission optical signal and a sensing detection light are generated by the same laser, transmission performance and sensing performance of the system are changed by adjusting modulation power of a transmission signal, the transmission signal is obtained by using direct detection at far-end, a sensing signal is obtained by using heterodyne coherent detection at local-end. The present invention provides a simple, compact and high-efficiency integrated system for co-frequency sharing optical fiber sneisng and communication, to solve the deficiencies of the existing integrated system in practical applications.