LI Yongqian,WANG Lei,FAN Haijun.Influence of laser wavelength instability, polarization fading and phase fluctuation on local heterodyne detection wavelength scanning BOTDR[J].Optoelectronics Letters,2023,(4):200-204 Influence of laser wavelength instability, polarization fading and phase fluctuation on local heterodyne detection wavelength scanning BOTDR Author Name Affiliation LI Yongqian  Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, China Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology, North China Electric Power University, Baoding 071003, China  WANG Lei  Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, China Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology, North China Electric Power University, Baoding 071003, China  FAN Haijun  Department of Electronic and Communication Engineering, North China Electric Power University, Baoding 071003, China Hebei Key Laboratory of Power Internet of Things Technology, North China Electric Power University, Baoding 071003, China Baoding Key Laboratory of Optical Fiber Sensing and Optical Communication Technology, North China Electric Power University, Baoding 071003, China  Abstract:       In this paper, the influence of laser wavelength instability, polarization fading and phase fluctuation on local heterodyne detection wavelength scanning Brillouin optical time domain reflectometer (WS-BOTDR) is theoretically analyzed, and a local heterodyne detection WS-BOTDR system is built for experimental verification. The experimental results show that with the increase of sensing distance, the adverse effect of laser wavelength instability, polarization fading and phase fluctuation on local heterodyne detection WS-BOTDR is gradually aggravated, which will lead to the broadening and distortion of the wavelength power spectrum (WPS), resulting in large errors in demodulated Brillouin central wavelength (BCW) and temperature. The average temperature measurement errors at the positions of 1 km, 5 km, 9 km non-heating section and 9.45 km heating section are 1.76 °C, 3.42 °C, 3.89° C and 4.3 °C, respectively. Hits: 402 Download times: 0 View Full Text    Download reader