LIU Jianfei,LI Chao,FAN Xujun,LUO Mingming,LUAN Nannan,YANG Wenrong.A method of phase demodulation of OFDR based on ARC-DSM algorithm[J].Optoelectronics Letters,2022,(1):13-17 A method of phase demodulation of OFDR based on ARC-DSM algorithm Author Name Affiliation LIU Jianfei  School of Electronic Information Engineering, Hebei University of Technology, Tianjin 300401, China  LI Chao  School of Electronic Information Engineering, Hebei University of Technology, Tianjin 300401, China  FAN Xujun  School of Electronic Information Engineering, Hebei University of Technology, Tianjin 300401, China  LUO Mingming  School of Electronic Information Engineering, Hebei University of Technology, Tianjin 300401, China  LUAN Nannan  School of Electronic Information Engineering, Hebei University of Technology, Tianjin 300401, China  YANG Wenrong  State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China  Abstract:       Aiming at low stability and high harmonic distortion of the traditional phase-generated carrier (PGC) demodulation algorithm, we propose a modified demodulation algorithm for distributed strain sensing in phase-sensitive optical frequency domain reflectometry (OFDR). The proposed algorithm combines the arctangent function and differential-self-multiplying (ARC-DSM), which eliminates the effect of modulation depth and realizes the high precision strain variation measurements. Simulation results show that distortion and harmonic distortion are effectively suppressed by the ARC-DSM algorithm. The minimum variation of the measurable static strain is about 0.3με and the spatial resolution can reach 0.2 m within 270 m range. Hits: 375 Download times: 8 View Full Text    Download reader