Send to

Choose Destination
See comment in PubMed Commons below
Opt Express. 2012 Jan 2;20(1):440-51. doi: 10.1364/OE.20.000440.

Temperature-induced index gratings and their impact on mode instabilities in high-power fiber laser systems.

Author information

  • 1Friedrich-Schiller-University Jena, Institute of Applied Physics, Albert-Einstein-Str. 15, 07745 Jena, Germany.


Mode-interference along an active fiber in high-power operation gives rise to a longitudinally oscillating temperature profile which, in turn, is converted into a strong index grating via the thermo-optic effect. In the case of mode beating between the fundamental mode and a radially anti-symmetric mode such a grating exhibits two periodic features: a main one which is radially symmetric and has half the period of the modal beating, and a second one that closely follows the mode interference pattern and has its same period. In the case of modal beating between two radially symmetric modes the thermally induced grating only has radially symmetric features and exhibits the same period of the mode interference. The relevance of such gratings in the context of the recently observed mode instabilities of high-power fiber laser systems is discussed.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Loading ...
    Support Center