Abstract
A dual-source distributed optical fiber sensor system with combined Raman and
Brillouin scatterings is designed for simultaneous temperature and strain
measurements. The optimal Raman and Brillouin signals can be separately obtained by
adjusting the powers of the two sources using an optical switch. The temperature and
strain can be determined by processing the optimal Raman and Brillouin signals. The
experimental result shows that 1.7 °C temperature resolution and 60-με
strain resolution can be achieved at a 24.7-km distance.
© 2012 Chinese Optics Letters
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