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Pump-Wavelength Dependence of Raman Gain in Single-Mode Optical Fibers



Nathan R. Newbury


The magnitude of the stimulated Raman gain spectrum will depend on the absolute wavelength of the pump laser. For many fibers, this dependence can be cast as a simple scaling of the overall gain curve according to a power-law dependence on the pump wavelength. We present three methods of measuring this scaling: estimation from Raman gain theory and known fiber parameters, a brute-force comparison of gain versus pump wavelength, and finally a more elegant comparison of the asymmetry in the Stokes and anti-Stokes Raman gain spectrum at a fixed pump wavelength. We discuss the advantages of the asymmetry technique, which yields the full wavelength dependence of the Raman gain with low uncertainty using only a single pump laser, a broadband source, and an optical spectrum analyzer. Finally, we report on the pump-wavelength scaling of the Raman gain for a number of standard transmission fibers.
Journal of Lightwave Technology


fiber optics, nonlinear optics, Raman amplifier, Raman scattering


Newbury, N. (2003), Pump-Wavelength Dependence of Raman Gain in Single-Mode Optical Fibers, Journal of Lightwave Technology (Accessed April 17, 2024)
Created December 1, 2003, Updated October 28, 2016