Open AccessControlling mode instabilities by dynamic mode excitation with an acousto-optic deflector
Author(s) -
Hans-Jürgen Otto,
César Jáuregui,
Fabian Stutzki,
Florian Jansen,
Jens Limpert,
Andreas Tünnermann
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.017285
Subject(s) - optics , mode (computer interface) , physics , beam (structure) , instability , excitation , amplifier , laser beam quality , light beam , quality (philosophy) , power (physics) , equilibrium mode distribution , optical fiber , single mode optical fiber , laser beams , optoelectronics , radiation mode , laser , computer science , mechanics , cmos , quantum mechanics , operating system
We demonstrate an approach to actively stabilize the beam profile of a fiber amplifier above the mode instability threshold. Both the beam quality and the pointing stability are significantly increased at power levels of up to three times the mode instabilities threshold. The physical working principle is discussed at the light of the recently published theoretical explanations of mode instabilities.