High-Spatial- and Spectral-Resolution Time-Domain Brillouin Distributed Sensing by Use of Two Frequency-Shifted Optical Beam Pairs

作者：Minardo A^*; Zeni L; Bernini R

来源：IEEE Photonics Journal, 2012, 4(5): 1900-1908.

DOI：10.1109/JPHOT.2012.2219301

• Brillouin fiber sensing
• optical fiber measurement
• stimulated Brillouin scattering (SBS)

We present a novel scheme aimed to improve spectral resolution in Brillouin distributed sensors based on single-mode standard fibers. The method makes use of two frequency-shifted optical pairs, the first one (the %26quot;writing%26quot; pair) devoted to excite the acoustic wave and the second one (the %26quot;reading%26quot; pair) employed to perform Brillouin gain interrogation. A numerical analysis demonstrates the capability of the method to ensure high spectral resolution even when operating in the high-spatial-resolution (similar to 1 m or less) regime. Preliminary experimental results carried out at 1-m spatial resolution are also reported.

• 出版日期2012-10