Analysis of stimulated Raman scattering in cw kW fiber oscillators

T. Schreiber; A. Liem; E. Freier; C. Matzdorf; R. Eberhardt; C. Jauregui; J. Limpert; A. Tünnermann

doi:10.1117/12.2039869

7 March 2014 Analysis of stimulated Raman scattering in cw kW fiber oscillators

T. Schreiber, A. Liem, E. Freier, C. Matzdorf, R. Eberhardt, C. Jauregui, J. Limpert, A. Tünnermann

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Proceedings Volume 8961, Fiber Lasers XI: Technology, Systems, and Applications; 89611T (2014) https://doi.org/10.1117/12.2039869
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

In this paper the threshold for Stimulated Raman scattering (SRS) is analyzed experimentally and theoretically for monolithic LMA cq kW fiber oscillators. Four oscillators with different spectral widths of the low reflecting (LR) Fiber Bragg Gratings (FBG) (0.04 nm, 0.5 nm, 1.5 nm (FWHM) and without LR grating) were characterized. Experimental it was found that threshold of SRS depends on the spectral width of the out coupling FBGs, which is not yet understood completely. Attempts to describe such lasers by simulations are based on nonlinear Schrödinger equation supporting spectral broadening of cw-fiber laser, rate equation gain as well as broadband Raman gain. The experimental results and the simulations were compared and discussed.

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T. Schreiber, T. Schreiber, A. Liem, A. Liem, E. Freier, E. Freier, C. Matzdorf, C. Matzdorf, R. Eberhardt, R. Eberhardt, C. Jauregui, C. Jauregui, J. Limpert, J. Limpert, A. Tünnermann, A. Tünnermann, "Analysis of stimulated Raman scattering in cw kW fiber oscillators", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89611T (7 March 2014); doi: 10.1117/12.2039869; https://doi.org/10.1117/12.2039869

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