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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 16 — Aug. 12, 2013
  • pp: 19375–19386

Passive mitigation strategies for mode instabilities in high-power fiber laser systems

Cesar Jauregui, Hans-Jürgen Otto, Fabian Stutzki, Florian Jansen, Jens Limpert, and Andreas Tünnermann  »View Author Affiliations


Optics Express, Vol. 21, Issue 16, pp. 19375-19386 (2013)
http://dx.doi.org/10.1364/OE.21.019375


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Abstract

Mode instabilities have quickly become the most limiting effect when it comes to scaling the output average power of fiber laser systems. In consequence, there is an urgent need for effective strategies to mitigate it and, thus, to increase the power threshold at which it appears. Passive mitigation strategies can be classified into intrinsic, which are related to the fiber design, and extrinsic, which require a modification of the setup. In order to evaluate the impact of mitigation strategies, a means to calculate its power threshold and predict its behavior is required. In this paper we present a simple semi-analytic formula that is able to predict the changes of the mode instability threshold by analyzing the strength of the thermally-induced waveguide perturbations. Furthermore, we propose two passive mitigation strategies, one intrinsic and one extrinsic, that should lead to a significant increase of the power threshold of mode instabilities.

© 2013 OSA

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2400) Fiber optics and optical communications : Fiber properties
(140.6810) Lasers and laser optics : Thermal effects

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: June 5, 2013
Revised Manuscript: July 15, 2013
Manuscript Accepted: July 17, 2013
Published: August 8, 2013

Citation
Cesar Jauregui, Hans-Jürgen Otto, Fabian Stutzki, Florian Jansen, Jens Limpert, and Andreas Tünnermann, "Passive mitigation strategies for mode instabilities in high-power fiber laser systems," Opt. Express 21, 19375-19386 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-16-19375


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