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Brillouin-based distributed temperature sensor employing pulse coding
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DOI：10.1109/JSEN.2007.913143.png)
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摘要
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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.
Keyword:
Brillouin scattering
distributed-fiber sensor
optical time-domain reflectometry (OTDR)
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期刊
IF:
4.5
论文数:
2.2W
被引数:
7.3W
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