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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 22 — Oct. 26, 2009
  • pp: 19814–19822

Pump absorption and temperature distribution in erbium-doped double-clad fluoride-glass fibers

Martin Gorjan, Marko Marinček, and Martin Čopič  »View Author Affiliations

Optics Express, Vol. 17, Issue 22, pp. 19814-19822 (2009)

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We investigate diode pump absorption and temperature distribution in three erbium-doped double-clad fluoride fibers. Absorption is measured via fluorescence intensity and temperature distribution is measured with thermal imaging. Ray-tracing calculations of absorption and heat-equation modeling of temperature distribution are also conducted. We found excellent agreement between measurements and calculations for all fibers. Results indicate that erbium-doped fluoride fiber lasers have already reached maximum output powers allowed under natural convection cooling, with fiber end being the most critical. We propose cooling and fiber design optimizations that may allow an order-of-magnitude further power-scaling.

© 2009 OSA

OCIS Codes
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2410) Fiber optics and optical communications : Fibers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(140.6810) Lasers and laser optics : Thermal effects

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: August 11, 2009
Revised Manuscript: October 9, 2009
Manuscript Accepted: October 12, 2009
Published: October 16, 2009

Martin Gorjan, Marko Marinček, and Martin Čopič, "Pump absorption and temperature distribution in erbium-doped double-clad fluoride-glass fibers," Opt. Express 17, 19814-19822 (2009)

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