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Development of a multiwavelength Raman fiber laser based on phase-shifted fiber Bragg gratings for long-distance remote-sensing applications

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Abstract

We propose a simple and flexible multiwavelength Raman fiber laser based on phase-shifted fiber Bragg gratings (FBGs) and a tunable chirped FBG. Using a simple multiwavelength Raman laser configuration with a single phase-shifted FBG and a tunable chirped FBG, we readily achieved simultaneous two-channel sensing probes with a high extinction ratio of more than 50dB over a 50-km distance. The multiwavelength output was stable and the peak fluctuation was less than 0.5dB. The temperature and strain sensitivities are estimated to be 10.1pm°C and 7.5pmμstrain, respectively.

© 2005 Optical Society of America

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