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

Published

December 1, 2003

Author(s)

Nathan R. Newbury

Abstract

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.

Citation

Journal of Lightwave Technology

Volume

21

Issue

12

Pub Type

Journals

Keywords

fiber optics, nonlinear optics, Raman amplifier, Raman scattering

Citation

Newbury, N. (2003), Pump-Wavelength Dependence of Raman Gain in Single-Mode Optical Fibers, Journal of Lightwave Technology (Accessed January 17, 2025)