Abstract

A numerical simulation of third-order cascaded Raman fiber laser based on tellurite fiber at the 2–5 μm waveband is presented. The Raman fiber laser can be optimized with the most suitable tellurite fiber length of 0.5–1.0 m and the most reasonable reflectivity of the third-order Stokes output FBG32 of 10%–20%. We demonstrate numerically that the third-order Stokes wave can reach the maximum average power of 45.2 W and the maximum optical conversion efficiency of 45.2%, corresponding to the FBG32 reflectivity of 10% and the tellurite fiber length of 0.3 m with the attenuation of 0.85 dB/m, when pumped by 2 μm light with the average power of 100 W. Our simulated results provide valuable theoretical guidance for the design and experiment of tellurite Raman fiber laser at a mid-infrared waveband.

© 2017 Optical Society of America

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