Brillouin-based distributed temperature sensor employing pulse coding

doi:10.1109/JSEN.2007.913143

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Brillouin-based distributed temperature sensor employing pulse coding

2008-03-01

DOI：10.1109/JSEN.2007.913143

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Abstract

En 中文

A distributed temperature sensor based on spontaneous Brillouin scattering and employing optical pulse coding has been implemented and characterized using a direct-detection receiver. The signal-to-noise ratio (SNR) enhancement provided by coding is analyzed, along with the influence of coding in stimulated Brillouin threshold. Simplex-coding using 127 bit codeword provides up to 7 dB SNR improvement, allowing for temperature sensing over 21 km of dispersion shifted fiber with 3.1 K resolution and 40 m spatial resolution, permitting to avoid the use of optical pulse amplification.

Keywords:

Brillouin scattering

distributed-fiber sensor

optical time-domain reflectometry (OTDR)

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