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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 13 — Jun. 18, 2012
  • pp: 13886–13895

Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers

Ee-Leong Lim, Shaif-ul Alam, and David J. Richardson  »View Author Affiliations

Optics Express, Vol. 20, Issue 13, pp. 13886-13895 (2012)

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A highly efficient (~80%), high power (18.45 W) in-band, core pumped erbium/ytterbium co-doped fiber laser is demonstrated. To the best of our knowledge, this is the highest reported efficiency from an in-band pumped 1.5 ┬Ám fiber laser operating in the tens of watts regime. Using a fitted simulation model, we show that the significantly sub-quantum limit conversion efficiency of in-band pumped erbium doped fiber amplifiers observed experimentally can be explained by concentration quenching. We then numerically study and experimentally validate the optimum pumping configuration for power scaling of in-band, cladding pumped erbium doped fiber amplifiers. Our simulation results indicate that a ~77% power conversion efficiency with high output power should be possible through cladding pumping of current commercially available pure Erbium doped active fibers providing the loss experienced by the cladding guided 1535 nm pump due to the coating absorption can be reduced to an acceptable level by better coating material choice. The power conversion efficiency has the potential to exceed 90% if concentration quenching of erbium ions can be reduced via improvements in fiber design and fabrication.

© 2012 OSA

OCIS Codes
(060.2410) Fiber optics and optical communications : Fibers, erbium
(140.3510) Lasers and laser optics : Lasers, fiber
(140.4480) Lasers and laser optics : Optical amplifiers

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 6, 2012
Revised Manuscript: May 17, 2012
Manuscript Accepted: May 21, 2012
Published: June 7, 2012

Ee-Leong Lim, Shaif-ul Alam, and David J. Richardson, "Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers," Opt. Express 20, 13886-13895 (2012)

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