Novel auto-correction method in a fiber-optic distributed-temperature sensor using reflected anti-Stokes Raman scattering.
A novel method for auto-correction of fiber optic distributed temperature sensor using anti-Stokes Raman back-scattering and its reflected signal is presented. This method processes two parts of measured signal. One part is the normal back scattered anti-Stokes signal and the other part is the reflected signal which eliminate not only the effect of local losses due to the micro-bending or damages on fiber but also the differential attenuation. Because the beams of the same wavelength are used to cancel out the local variance in transmission medium there is no differential attenuation inherently. The auto correction concept was verified by the bending experiment on different bending points.
Hwang
Dusun
D
Department of Information and Communications, School of Photon Science and Technology, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju 500-712, Korea.
Yoon
Dong-Jin
DJ
Kwon
Il-Bum
IB
Seo
Dae-Cheol
DC
Chung
Youngjoo
Y
D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D005336:Fiber Optic Technology / Q000295:instrumentation*; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013821:Thermometers; D014159:Transducers