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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 12 — Apr. 20, 2001
  • pp: 1925–1930

Asymmetry of the Forward and Backward Raman Gain Coefficient at 1.54 μm in Methane

Young Soo Choi  »View Author Affiliations


Applied Optics, Vol. 40, Issue 12, pp. 1925-1930 (2001)
http://dx.doi.org/10.1364/AO.40.001925


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Abstract

The threshold pump energies at 1.06 μm and Raman gain coefficients of stimulated Raman scattering (SRS) at 1.54 μm have been measured in both single-pass and half-resonator configurations at various methane pressures. In the single-pass configuration, the Raman gain coefficients of the backward and forward SRS are 0.32 and 0.23 cm/GW at 95 atm, respectively. The backward Raman gain coefficient is higher than the forward Raman gain coefficient. This gain reduction is caused by the depletion of local pump intensity, the phase-matching conditions, and the transient effect of the high amplification rate in the forward SRS process. In the half-resonator configuration, the Raman gain coefficient was 0.46 cm/GW at 75 atm of methane.

© 2001 Optical Society of America

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3550) Lasers and laser optics : Lasers, Raman

Citation
Young Soo Choi, "Asymmetry of the Forward and Backward Raman Gain Coefficient at 1.54 μm in Methane," Appl. Opt. 40, 1925-1930 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-12-1925

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