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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 2 — Jan. 15, 2014
  • pp: 209–211

Triple-clad large-pitch fibers for compact high-power pulsed fiber laser systems

Christian Gaida, Fabian Stutzki, Florian Jansen, Hans-Jürgen Otto, Tino Eidam, Cesar Jauregui, Oliver de Vries, Jens Limpert, and Andreas Tünnermann  »View Author Affiliations


Optics Letters, Vol. 39, Issue 2, pp. 209-211 (2014)
http://dx.doi.org/10.1364/OL.39.000209


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Abstract

We present a novel ytterbium (Yb)-doped large-pitch fiber design with significantly increased pump absorption and higher energy storage/gain per unit length, which enables high-peak-power fiber laser systems with smaller footprints. Up to now index matching between core and surrounding material in microstructured fibers was achieved by co-doping the active core region with fluorine. Here we carry out the index matching by passively doping the cladding with germanium, thus raising its index of refraction. Hence, the fluorine in the core can be omitted, which leads to an effective increase of the core doping concentration, while detrimental effects such as photo-darkening and lifetime quenching are avoided by maintaining the bulk Yb concentration. Experiments and simulations show that a gain higher than 50dB/m and an output average power higher than 100 W with excellent beam quality are feasible even with a fiber length of only 40 cm.

© 2014 Optical Society of America

OCIS Codes
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(060.2400) Fiber optics and optical communications : Fiber properties

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: October 10, 2013
Revised Manuscript: November 27, 2013
Manuscript Accepted: November 28, 2013
Published: January 3, 2014

Citation
Christian Gaida, Fabian Stutzki, Florian Jansen, Hans-Jürgen Otto, Tino Eidam, Cesar Jauregui, Oliver de Vries, Jens Limpert, and Andreas Tünnermann, "Triple-clad large-pitch fibers for compact high-power pulsed fiber laser systems," Opt. Lett. 39, 209-211 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-2-209


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References

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