A comparison of mode instability in Yb- and Tm-doped fiber amplifiers

Arlee V. Smith; Jesse J. Smith

doi:10.1117/12.2209189

9 March 2016 A comparison of mode instability in Yb- and Tm-doped fiber amplifiers

Arlee V. Smith, Jesse J. Smith

Proceedings Volume 9728, Fiber Lasers XIII: Technology, Systems, and Applications; 97280C (2016) https://doi.org/10.1117/12.2209189
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

We use a detailed numerical model of stimulated thermal Rayleigh scattering to compare mode instability thresholds in cladding pumped Tm³⁺-doped and Yb³⁺-doped fiber amplifiers. The Tm-doped fiber amplifies 2040 nm light using a 790 nm pump; the Yb-doped fiber amplifies 1060 nm light using a 976 nm pump. The predicted instability threshold of the Tm-doped fiber is found to be higher than that of the Yb-doped fiber, even though its heat load is much higher. We attribute the higher threshold in part to its longer signal wavelength, and in part to stronger gain saturation.

Citation Download Citation

Arlee V. Smith and Jesse J. Smith "A comparison of mode instability in Yb- and Tm-doped fiber amplifiers", Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97280C (9 March 2016); https://doi.org/10.1117/12.2209189

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