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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 8 — Apr. 11, 2011
  • pp: 7398–7409

Single-mode ytterbium-doped large-mode-area photonic bandgap rod fiber amplifier

Thomas Tanggaard Alkeskjold, Marko Laurila, Lara Scolari, and Jes Broeng  »View Author Affiliations


Optics Express, Vol. 19, Issue 8, pp. 7398-7409 (2011)
http://dx.doi.org/10.1364/OE.19.007398


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Abstract

Enabling Single-Mode (SM) operation in Large-Mode-Area (LMA) fiber amplifiers and lasers is critical, since a SM output ensures high beam quality and excellent pointing stability. In this paper, we demonstrate and test a new design approach for achieving SM LMA rod fibers by using a photonic bandgap structure. The structure allows resonant coupling of higher-order modes from the core and acts as a spatially Distributed Mode Filter (DMF). With this approach, we demonstrate passive SM performance in an only ~50cm long and straight ytterbium-doped rod fiber. The amplifier has a mode field diameter of ~59µm at 1064nm and exhibits a pump absorption of 27dB/m at 976nm.

© 2011 OSA

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(060.4005) Fiber optics and optical communications : Microstructured fibers
(060.3510) Fiber optics and optical communications : Lasers, fiber

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: March 1, 2011
Revised Manuscript: March 21, 2011
Manuscript Accepted: March 27, 2011
Published: April 1, 2011

Citation
Thomas Tanggaard Alkeskjold, Marko Laurila, Lara Scolari, and Jes Broeng, "Single-mode ytterbium-doped large-mode-area photonic bandgap rod fiber amplifier," Opt. Express 19, 7398-7409 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-8-7398


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References

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