YANG Run-run, LI Yong-qian, ZHANG Li-xin, et al. Improving Dynamic Range of Pulse Coding Rayleigh BOTDA System[J]. 2016,(6):16-19. DOI: 10.13756/j.gtxyj.2016.06.004.
The dynamic range of Rayleigh Brillouin Optical Time Domain Analysis(BOTDA)system is analyzed theoretically.A method using pulse coding is proposed to improve the signal-to-noise ratio and dynamic range of the system.The encoding and decoding principle of Simplex code and Golay code in Rayleigh BOTDA systemis introduced.Based on the analysis and comparison of signal-to-noise ratio improvement quantity using the method of superimposed averaging and pulse coding in Rayleigh BOTDA system
it is found that the pulse coding technology has more advantages in increasing dynamic range of the Rayleigh BOTDA system.The performance comparison is verified by using Matlab simulation.The simulation results show that the coding technology can significantly improve the signal-to-noise ratio as well as the dynamic range.