Combination of phase modulation and coding for SNR enhancement in distributed Brillouin sensors
作者： A. Fernandez , Y. Mao , C. Lu , J. Chi
DOI: 10.1049/EL.2011.0440
关键词: Optical fiber 、 Phase modulation 、 Noise reduction 、 Short Code 、 Coding (social sciences) 、 Optics 、 Physics 、 Image resolution 、 Brillouin zone 、 Signal processing
摘要: This reported work proposes and demonstrates the benefits of a phase-coded pump using Simplex code into distributed strain sensor based on Brillouin optical-fibre time-domain analysis technique. It is considered that experimental results show significant signal-to-noise ratio (SNR) enhancement provided by an increasing length with short (7 to 31 bits), thus allowing for sensing over 30 m standard fibre 1 cm spatial resolution.
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