OPTM Poster Session

[OPTMp-07] Measurement of absolute length difference based on optical fiber interferometer

*Xin Lai¹, Qiuheng Song², Yixiao Ma¹, Yuchen Song¹, Kun Jia¹, Lai Zhang¹, Yuanyuan Sun¹, Pengwei Zhou¹, Hekuo Peng¹, Qian Xiao¹, Bo Jia¹ (1. Fudan University, 2. Sichuan Fujinan Technology CO., LTD)

A method of measuring the absolute length difference between two arms of optical fiber interferometer based on the phase modulation of light source is proposed. The method is suitable for both short-distance and long-distance optical fiber interference systems, and implementable for compensating and measuring absolute length difference of in-service optical fiber interferometer.