ZHOU Qi, CHEN Jun, YU Long, et al. A Novel COTDR Signal Processing Algorithm to Reduce the Fluctuation and Detect the Events[J]. 2018,(1):5-7. DOI: 10.13756/j.gtxyj.2018.01.002.
The Coherent Optical Time Domain Reflectometer(COTDR)is an efficient tool to measure the state of submarine optical cable.However
it is difficult to detect the events on optical cable automatically due to the amplitude fluctuation on COTDR curve
which is caused by coherent Rayleigh noise and polarization noise.An efficient COTDR signal processing algorithm based on wavelet transform
linear dependent coefficients and moving averaging method is proposed.The amplitude fluctuation can be reduced and the curves obtained by the proposed algorithm is much smoother than traditional wavelet denoise algorithm.It is shown that almost all the events can be found in experiments.