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

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

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/degrees C and 7.5 pm/microstrain, respectively.

Young-Geun Han | Sang Bae Lee | Sang-Hyuck Kim | T V A Tran

[1] Raman amplifier based long-distance, remote FBG strain sensor with EDF broadband source recycling residual Raman pump , 2004 .

[2] Michael A. Davis,et al. Fiber grating sensors , 1997 .

[3] Young-Geun Han,et al. Effectively tunable dispersion compensation based on chirped fiber Bragg gratings without central wavelength shift , 2004 .

[4] Tong Sun,et al. Bragg grating-based fiber-optic laser probe for temperature sensing , 2004, IEEE Photonics Technology Letters.

[5] L Bjerkan. Application of fiber-optic bragg grating sensors in monitoring environmental loads of overhead power transmission lines. , 2000, Applied optics.

[6] F. Bakhti,et al. Wide bandwidth, low loss and highly rejective doubly phase-shifted UV-written fibre bandpass filter , 1996 .

[7] Chang-Seok Kim,et al. Simultaneous measurement of temperature and strain using dual long-period fiber gratings with controlled temperature and strain sensitivities. , 2003, Optics express.

[8] Sien Chi,et al. Long-distance FBG sensor system using a linear-cavity fiber Raman laser scheme , 2004 .