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Proceedings Paper

Influence of signal bandwidth on mode instability thresholds of fiber amplifiers
Author(s): Jesse J. Smith; Arlee V. Smith
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Paper Abstract

We show how signal bandwidth affects the gain of stimulated thermal Rayleigh scattering (STRS) which is responsible for a transverse mode instability in fiber amplifiers. The gain is reduced if the coherence time of the signal is less than the group-velocity-induced walk off between the two interacting modes, usually LP01 and LP11. We derive expressions for the bandwidth required to suppress gain for short pulses, for periodically chirped continuous waves, and for general periodically modulated cases.

Paper Details

Date Published: 4 March 2015
PDF: 8 pages
Proc. SPIE 9344, Fiber Lasers XII: Technology, Systems, and Applications, 93440L (4 March 2015); doi: 10.1117/12.2077021
Show Author Affiliations
Jesse J. Smith, AS-Photonics, LLC (United States)
Arlee V. Smith, AS-Photonics, LLC (United States)

Published in SPIE Proceedings Vol. 9344:
Fiber Lasers XII: Technology, Systems, and Applications
L. Brandon Shaw, Editor(s)

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