KEYWORDS: Scattering, Signal detection, Laser scattering, Heterodyning, Signal attenuation, Rayleigh scattering, Light scattering, Signal to noise ratio, Temperature metrology, Sensing systems
A distributed optical fiber temperature and strain sensing system using the Landau-Placzek Ratio (LPR) has been
introduced. By applying LPR to simultaneous measurement system of temperature and strain based on Brillouin optical
time domain reflectometer (BOTDR), the infulence of fiber attenuation, splice loss, and microbending loss on
measurement result could be eliminated. This paper has presented a simultaneous measurement system of temperature
and strain based on LPR. The light source configuration and method to improve polarization-induced fading used in the
system are discussed. At last, the measurement accuracy and its effect factors are also been analyzed.
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