Simultaneous distance and velocity measurement based on a bidirectional chirped fiber Bragg grating(CFBG)

摘要

The simultaneous distance and velocity measurement system based on a bidirectional chirped fiber Bragg grating (CFBG) is proposed. By using the bidirectional CFBG, a dual-chirp optical signal with large bandwidth is generated. After the de-chirp processing in the optical domain, both the distance and velocity information can be obtained simultaneously. A simulation is carried out. A dual-chirp optical signal with a bandwidth of 0.208 THz is generated. The simultaneous distance and velocity measurement is achieved, with the ranging resolution of 0.9 mm and the velocity resolution of 0.058 km/s, respectively.