SNR improvement in self-heterodyne detection Brillouin optical time domain reflectometer using Golay pulse codes

The application of Golay pulse coding technique in spontaneous Brillouin-based distributed temperature sensor based on self-heterodyne detection of Rayleigh and Brillouin scattering is theoretically and experimentally analyzed. The enhancement of system signal to noise ratio（SNR） and reduction of te...

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Published inOptoelectronics letters Vol. 13; no. 6; pp. 414 - 418
Main Author 李永倩;李晓娟;范寒柏;安琪;张立欣
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University of Technology 01.11.2017
Springer Nature B.V
Subjects
Coding
Error analysis
Lasers
Noise reduction
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Reflectometers
Signal to noise ratio
Spatial resolution
Temperature measurement
Temperature sensors
Time domain analysis
A
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ISSN1673-1905
1993-5013
DOI10.1007/s11801-017-7182-7

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Summary:The application of Golay pulse coding technique in spontaneous Brillouin-based distributed temperature sensor based on self-heterodyne detection of Rayleigh and Brillouin scattering is theoretically and experimentally analyzed. The enhancement of system signal to noise ratio（SNR） and reduction of temperature measurement error provided by coding are characterized. By using 16-bit Golay coding, SNR can be improved by about 2.77 d B, and temperature measurement error of the 100 m heated fiber is reduced from 1.4 °C to 0.5 °C with a spatial resolution of 13 m. The results are believed to be beneficial for the performance improvement of self-heterodyne detection Brillouin optical time domain reflectometer.
Bibliography:12-1370/TN
Brillouin,Golay,Rayleigh,codes,BOTDR,decoding,heated,normalized,spontaneous,Stokes
The application of Golay pulse coding technique in spontaneous Brillouin-based distributed temperature sensor based on self-heterodyne detection of Rayleigh and Brillouin scattering is theoretically and experimentally analyzed. The enhancement of system signal to noise ratio（SNR） and reduction of temperature measurement error provided by coding are characterized. By using 16-bit Golay coding, SNR can be improved by about 2.77 d B, and temperature measurement error of the 100 m heated fiber is reduced from 1.4 °C to 0.5 °C with a spatial resolution of 13 m. The results are believed to be beneficial for the performance improvement of self-heterodyne detection Brillouin optical time domain reflectometer.
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ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-017-7182-7