Abstract
A multi-parameter optical-fiber sensor is proposed, which is based on multiple acoustic modes instead of multiple optical modes in stimulated Brillouin scattering (SBS) effect only utilizing standard single mode fiber (SSMF). The experimental results indicate that simultaneous temperature and strain measurement is achieved with a sensitivity of ~ 1.3 MHz/°C and ~ 0.05 MHz/με respectively. Moreover, a high spatial resolution of 0.12 m employing the 23/22 ns pulse pair over 19 km sensing length is demonstrated.
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