Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 23, Issue 7, Pages 435-437Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2107551
Keywords
Brillouin optical time-domain analyzer (BOTDA); distributed fiber sensor; optical pulse coding (OPC); Raman amplification; stimulated Brillouin scattering
Funding
- National Natural Science Foundation of China [60537040]
- Education Ministry of China [A090101 0120060614017]
- Sichuan Provincial Education Department [09ZB060]
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The combination of Raman amplification and optical pulse coding (OPC) is proposed to reduce the frequency uncertainty in a long-distance Brillouin optical time-domain analyzer (BOTDA) under higher spatial resolution. The experimental characterization of temperature sensing with measurement accuracy similar to 1 degrees C under similar to 2.5-m spatial resolution over a whole length of sensing fiber is demonstrated. The sensing fiber is composed of 49.6-km fiber at 10.8-GHz Brillouin frequency shift (BFS) and 25-km fiber at 11.005 GHz.
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