Han, YG Tran, TVA Kim, SH Lee, SB 2024-01-21T05:03:43Z 2024-01-21T05:03:43Z 2021-09-03 2005-05-15 0146-9592 https://pubs.kist.re.kr/handle/201004/136463 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 50 dB over a 50-km distance. The multiwavelength output was stable and the peak fluctuation was less than 0.5 dB. The temperature and strain sensitivities are estimated to be 10.1 pm/° C and 7.5 pm//-μ strain, respectively. © 2005 Optical Society of America. English OPTICAL SOC AMER TEMPERATURE STRAIN SENSORS Development of a multiwavelength Raman fiber laser based on phase-shifted fiber Bragg gratings for long-distance remote-sensing applications Article 10.1364/OL.30.001114 1 OPTICS LETTERS, v.30, no.10, pp.1114 - 1116 OPTICS LETTERS 30 10 1114 1116 scie scopus 000229011800010 2-s2.0-20444416366 Optics Optics Article TEMPERATURE STRAIN SENSORS Fiber optics