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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 17 — Aug. 13, 2012
  • pp: 18803–18818

High-energy, 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 17, pp. 18803-18818 (2012)

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We have demonstrated and compared high-energy, in-band pumped erbium doped fiber amplifiers operating at 1562.5 nm under both a core pumping scheme (CRS) and a cladding pumping scheme (CLS). The CRS/CLS sources generated smooth, single-peak pulses with maximum pulse energies of ~1.53/1.50 mJ, and corresponding pulse widths of ~176/182 ns respectively, with an M2 of ~1.6 in both cases. However, the conversion efficiency for the CLS was >1.5 times higher than the equivalent CRS variant operating at the same pulse energy due to the lower pump intensity in the CLS that mitigates the detrimental effects of ion concentration quenching. With a longer fiber length in a CLS implementation a pulse energy of ~2.6 mJ is demonstrated with a corresponding M2 of ~4.2. Using numerical simulations we explain that the saturation of pulse energy observed in our experiments is due to saturation of the pump absorption.

© 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: June 7, 2012
Revised Manuscript: July 25, 2012
Manuscript Accepted: July 27, 2012
Published: August 1, 2012

Ee-Leong Lim, Shaif-ul Alam, and David J. Richardson, "High-energy, in-band pumped erbium doped fiber amplifiers," Opt. Express 20, 18803-18818 (2012)

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