Experimental analysis of the influence of the spectral width of out-coupling Fiber Bragg Gratings to the amount of Stimulated Raman Scattering in a cw kW fiber oscillator

The spectral behavior of a LMA cw kW fiber oscillator was measured depending on the spectral width of the out coupling FBGs (0.04 nm, 0.5 and 1.5 nm (FWHM)). The SRS thresholds were compared.

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