Failure and limitations of linear Raman gain approximation for fiber supercontinuum generation modelling

Miro Erkintalo; Goëry Genty; Benjamin Wetzel; John M. Dudley

doi:10.1117/12.874858

21 February 2011 Failure and limitations of linear Raman gain approximation for fiber supercontinuum generation modelling

Miro Erkintalo, Goëry Genty, Benjamin Wetzel, John M. Dudley

Author Affiliations +

Proceedings Volume 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X; 791710 (2011) https://doi.org/10.1117/12.874858
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

The propagation of short pulses in optical fibers is commonly modeled by the generalized Nonlinear Schrodinger equation which includes the frequency-dependence of the dispersion and nonlinear response and the non-instantaneous part of the nonlinear response of silica. It is also common to model the delayed -or Raman- response of silica based on the assumption of a material response that varies linearly with frequency. Here, we examine in detail the accuracy and limitations of this widely used approach. Our major conclusion is that the linear Raman gain approximation performs very poorly in parameter regimes typical of many experimental studies, introducing significant errors and artifacts into the spectral and statistical properties of the supercontinuum spectrum.

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Miro Erkintalo, Goëry Genty, Benjamin Wetzel, and John M. Dudley "Failure and limitations of linear Raman gain approximation for fiber supercontinuum generation modelling", Proc. SPIE 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X, 791710 (21 February 2011); https://doi.org/10.1117/12.874858

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