K. Desouza et al., DIODE-PUMPED LANDAU-PLACZEK BASED DISTRIBUTED TEMPERATURE SENSOR UTILIZING AN ALL-FIBER MACH-ZEHNDER INTERFEROMETER, Electronics Letters, 32(23), 1996, pp. 2174-2175
A Mach-Zehnder interferometer has been used for the first time in the
detection system of a distributed temperature sensor, based on the Lan
dau-Placzek ratio method. The interferometer separates the back-scatte
red Rayleigh and Brillouin signals with very low losses. Used together
with a novel diode-pumped Q-switched fibre laser source, performance
has been improved at a substantial cost saving over previously reporte
d work.