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Proceedings Paper

Temperature measurements in an ytterbium fiber amplifier up to the mode instability threshold
Author(s): F. Beier; M. Heinzig; Bettina Sattler; Till Walbaum; N. Haarlammert; T. Schreiber; R. Eberhardt; A. Tünnermann
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Paper Abstract

We report on the measurement of the longitudinal temperature distribution in a fiber amplifier fiber during high power operation. The measurement signal of an optical frequency domain reflectometer is coupled to an ytterbium doped amplifier fiber via a wavelength division multiplexer. The longitudinal temperature distribution was examined for different pump powers with a sub mm resolution. The results show even small temperature variations induced by slight changes of the environmental conditions along the fiber. The mode instability threshold of the fiber under investigation was determined to be 480W and temperatures could be measured overall the measured output power values.

Paper Details

Date Published: 11 March 2016
PDF: 7 pages
Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97282P (11 March 2016); doi: 10.1117/12.2212423
Show Author Affiliations
F. Beier, Friedrich Schiller Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
M. Heinzig, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Bettina Sattler, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
Till Walbaum, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
N. Haarlammert, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
T. Schreiber, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
R. Eberhardt, Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)
A. Tünnermann, Friedrich Schiller Univ. Jena (Germany)
Fraunhofer Institute for Applied Optics and Precision Engineering (Germany)


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

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