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Proceedings Paper

A comparison of mode instability in Yb- and Tm-doped fiber amplifiers
Author(s): Arlee V. Smith; Jesse J. Smith
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Paper 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.

Paper Details

Date Published: 9 March 2016
PDF: 10 pages
Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97280C (9 March 2016); doi: 10.1117/12.2209189
Show Author Affiliations
Arlee V. Smith, AS-Photonics, LLC (United States)
Jesse J. Smith, AS-Photonics, LLC (United States)

Published in SPIE Proceedings Vol. 9728:
Fiber Lasers XIII: Technology, Systems, and Applications
John Ballato, Editor(s)

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