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Enhancement of signal-noise-ratio in a distributed polarization mode coupling detection system |
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| Authors: | Wen-cai Jing Xiao-jingi Li Kun Liu Tian-hua Xu Yi-mo Zhang Hong-xia Zhang Da-gong Jia and Gang-Ding Peng |
| Affiliation: | (1) College of Precision Instrument & Opto-electronics Engineering, Natioual Education ministry Key Laboratory of Optoelectronics Information and Technical Science, Tianjin University, Tianjin, 300072, China;(2) School of Electrical Engineering and Telecommunications, University of New South Wales, Australia |
| Abstract: | A distributed polarization-mode coupling measurement system was designed and implemented using white light interferometry. It can be used for the measurement of polarization mode coupling in a high-birefringence fiber of up to 1 km. This system can be used in both fiber-optic sensors and optical fiber communications. Wavelet Transform was adopted in data processing to improve the signal-noise-ratio. The signal-noise-ratio of this system was improved more than 15 dB after denoising. The influence of denoising threshold on signal-noise-ratio and measurement accuracy was also discussed. Hilbert Transform and non-linear regression can be used in conjunction with Wavelet Transform to enhance the signal-noise-ratio and spatial resolution of this system. |
| Keywords: | Wavelet transform denoising polarization |
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