Abstract

Stimulated Brillouin Scattering (SBS) has been extensively studied over the past few decades due to the many interesting properties and potential applications. Primarily, spontaneous Brillouin scattering (BS) has been used as a temperature and strain sensor enabling long range detection (tens of kilometres) with a relatively good spatial resolution (few meters) [1]. Such distributed temperature or strain sensors (DTSS) are capable of sensing 0.1°C temperature changes or micro-strains over long distances across large areas. However, sensitivity has remained mostly unchanged due to intrinsic properties of BS (1^st order Brillouin frequency shift) leading towards a typical sensitivity of respectively ~1.2 MHz/°C and ~0.046MHz/µε to temperature and strain.

© 2017 IEEE