22 February 2017 SRS modeling in high power CW fiber lasers for component optimization
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Abstract
A CW kilowatt fiber laser numerical model has been developed taking into account intracavity stimulated Raman scattering (SRS). It uses the split-step Fourier method which is applied iteratively over several cavity round trips. The gain distribution is re-evaluated after each iteration with a standard CW model using an effective FBG reflectivity that quantifies the non-linear spectral leakage. This model explains why spectrally narrow output couplers produce more SRS than wider FBGs, as recently reported by other authors, and constitute a powerful tool to design optimized and innovative fiber components to push back the onset of SRS for a given fiber core diameter.
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G. Brochu, G. Brochu, A. Villeneuve, A. Villeneuve, M. Faucher, M. Faucher, M. Morin, M. Morin, F. Trépanier, F. Trépanier, R. Dionne, R. Dionne, } "SRS modeling in high power CW fiber lasers for component optimization", Proc. SPIE 10085, Components and Packaging for Laser Systems III, 100850N (22 February 2017); doi: 10.1117/12.2248336; https://doi.org/10.1117/12.2248336
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