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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 4 — Feb. 13, 2012
  • pp: 3997–4008

Thermally induced waveguide changes in active fibers

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


Optics Express, Vol. 20, Issue 4, pp. 3997-4008 (2012)
http://dx.doi.org/10.1364/OE.20.003997


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Abstract

Thermally induced waveguide changes become significant for very large mode area fibers. This results in a reduction of the mode-field diameter, but simultaneously in an improvement of the beam quality. In this work the first systematic experimental characterization of the reduction of the mode-field diameter in various fibers during high-power operation is carried out. It is shown that the reduction of the mode-field diameter shows a characteristic behavior that scales with the core size but that is independent of the particular fiber design. Furthermore, the strength of the actual index change is experimentally estimated, and its use to overcome avoided crossings is discussed and experimentally demonstrated.

© 2012 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(140.6810) Lasers and laser optics : Thermal effects
(350.6830) Other areas of optics : Thermal lensing
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: November 28, 2011
Revised Manuscript: January 5, 2012
Manuscript Accepted: January 18, 2012
Published: February 2, 2012

Citation
Florian Jansen, Fabian Stutzki, Hans-Jürgen Otto, Tino Eidam, Andreas Liem, Cesar Jauregui, Jens Limpert, and Andreas Tünnermann, "Thermally induced waveguide changes in active fibers," Opt. Express 20, 3997-4008 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-4-3997


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