A New Approach for Quality Monitoring Based on Multi-Channel Optical Fiber

In view of the fact that the existing OTDR (Optical Time-Domain Reflectometry) system is difficult to meet the requirements of high resolution and long distance sensing, based on the optical time domain reflectometer, this paper studies the factors affecting the performance of the system by analyzingBOTDR (Brillouin Optical Time-Domain Reflectometry) technology, by means of the time-varying Markoffchain model, combined with the compilation of the time-varying Markoff chain model, an code sequencepulse light technology is proposed to optimize the signal-to-noise ratio of BOTDR system. This method canrealize the long distance sensing under the condition of low detecting light power, and improve the accuracyof the sensing system by improving the data fitting method. Finally, the practicability and effectiveness ofthe method is verified by experiments..Keywords- OTDR, optical time domain