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Transverse mode instabilities in burst operation of high-power fiber laser systems

 
: Jauregui, C.; Stihler, C.; Tünnermann, A.; Limpert, J.

:

Hartl, I. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XV: Technology and Systems 2018 : 29 January - 1 February 2018, San Francisco, California
Bellingham, WA: SPIE, 2018 (Proceedings of SPIE 10512)
ISBN: 978-1-5106-1509-0
ISBN: 978-1-5106-1510-6
Paper 1051207, 6 pp.
Conference "Fiber Lasers - Technology and Systems <15, 2018, San Francisco/Calif.>
English
Conference Paper
Fraunhofer IOF ()

Abstract
We propose, to the best of our knowledge, the first mitigation strategy for TMI based on controlling the phase shift between the thermally-induced index grating and the modal intensity pattern. In particular, in this work we present a study of transverse mode instabilities in burst operation in a high-power fiber laser system. It is shown that, with a careful choice of the parameters, this operation regime can potentially lead to the mitigation of TMI by forcing an energy transfer from the higher-order-modes into the fundamental mode during the burst.

: http://publica.fraunhofer.de/documents/N-520723.html