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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 18 — Sep. 15, 2006
  • pp: 2684–2686

Long-distance fiber Bragg grating sensor system with a high optical signal-to-noise ratio based on a tunable fiber ring laser configuration

Yun-Jiang Rao, Zeng-Ling Ran, and Rong-Rui Chen  »View Author Affiliations

Optics Letters, Vol. 31, Issue 18, pp. 2684-2686 (2006)

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A novel tunable fiber ring laser configuration with a combination of bidirectional Raman amplification and dual erbium-doped fiber (EDF) amplification is proposed for realizing high optical signal-to-noise ratio (SNR), long-distance, quasi-distributed fiber Bragg grating (FBG) sensing systems with large capacities and low cost. The hybrid Raman–EDF amplification configuration arranged in the ring laser can enhance the optical SNR of FBG sensor signals significantly owing to the good combination of the high gain of the erbium-doped fiber amplifier (EDFA) and the low noise of the Raman amplification. Such a sensing system can support a large number of FBG sensors because of the use of a tunable fiber Fabry–Perot filter located within the ring laser and spatial division multiplexing for expansion of sensor channels. Experimental results show that an excellent optical SNR of 60 dB has been achieved for a 50 km transmission distance with a low Raman pump power of 170 mW at a wavelength of 1455 nm and a low EDFA pump power of 40 mW at a wavelength of 980 nm , which is the highest optical SNR achieved so far for a 50 km long FBG sensor system, to our knowledge.

© 2006 Optical Society of America

OCIS Codes
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4230) Fiber optics and optical communications : Multiplexing
(070.4560) Fourier optics and signal processing : Data processing by optical means

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: April 25, 2006
Revised Manuscript: June 29, 2006
Manuscript Accepted: June 30, 2006
Published: August 25, 2006

Yun-Jiang Rao, Zeng-Ling Ran, and Rong-Rui Chen, "Long-distance fiber Bragg grating sensor system with a high optical signal-to-noise ratio based on a tunable fiber ring laser configuration," Opt. Lett. 31, 2684-2686 (2006)

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