Enhancement of signal-noise-ratio in a distributed polarization mode coupling detection system

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 fib...

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Bibliographic Details
Published in:Optoelectronics letters 2007-01, Vol.3 (1), p.57-61, Article 57
Main Authors: Jing, Wen-cai, Li, Xiao-jingi, Liu, Kun, Xu, Tian-hua, Zhang, Yi-mo, Zhang, Hong-xia, Jia, Da-gong, Peng, Gang-Ding
Format: Article
Language:English
Subjects:
Birefringence
Coupled modes
Coupling
Data processing
Fiber optics
Hilbert transformation
Noise
Noise measurement
Noise reduction
Noise threshold
Optical communication
Optical fibers
Polarization
Signal processing
Spatial resolution
Wavelet transforms
White light interferometry
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Summary: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.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-007-6158-4