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Proceedings Paper

85 µm core rod fiber amplifier delivering 350 W/m
Author(s): Mette M. Johansen; Mattia Michieletto; Torben Kristensen; Thomas T. Alkeskjold; Jesper Lægsgaard
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Paper Abstract

An improved version of the distributed modal filtering (DMF) rod fiber is tested in a high power setup delivering 350 W/m of extracted signal average power limited by the available pump power. The rod fiber is thoroughly tested to record the transverse modal instability (TMI) behavior and also measure degradation of the TMI threshold with operation time due to induced absorption in the active material increasing the thermo-optical heat load. Multiple testing degrades the rod fiber and TMI threshold from >360 W to a saturated power level of roughly 240 W.

Paper Details

Date Published: 9 March 2016
PDF: 6 pages
Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97280I (9 March 2016); doi: 10.1117/12.2213274
Show Author Affiliations
Mette M. Johansen, Technical Univ. of Denmark (Denmark)
NKT Photonics A/S (Denmark)
Mattia Michieletto, Technical Univ. of Denmark (Denmark)
NKT Photonics A/S (Denmark)
Torben Kristensen, NKT Photonics A/S (Denmark)
Thomas T. Alkeskjold, NKT Photonics A/S (Denmark)
Jesper Lægsgaard, Technical Univ. of Denmark (Denmark)

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

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