Multiwavelength Raman-fiber-laser-based long-distance remote sensor for simultaneous measurement of strain and temperature.

@article{Han2005MultiwavelengthRL,
  title={Multiwavelength Raman-fiber-laser-based long-distance remote sensor for simultaneous measurement of strain and temperature.},
  author={Young-Geun Han and Thi Van Anh Tran and Sang-Hyuck Kim and Sang Bae Lee},
  journal={Optics letters},
  year={2005},
  volume={30 11},
  pages={1282-4}
}
We propose a simple and flexible multiwavelength Raman-fiber-laser-based long-distance remote-sensing scheme for simultaneous measurement of strain and temperature by use of fiber Bragg gratings. By combining two uniform fiber Bragg gratings with a tunable chirped fiber grating, we readily achieve simultaneous two-channel sensing probes with a high extinction ratio of more than approximately 50 dB over a 50-km distance. When strain and temperature are applied, lasing wavelength separation and… CONTINUE READING
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