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Journal of the Optical Society of Korea

Journal of the Optical Society of Korea


  • Vol. 13, Iss. 4 — Dec. 25, 2009
  • pp: 416–422

Multi-kilowatt Single-mode Ytterbium-doped Large-core Fiber Laser

Yoon-Chan Jeong, Alexander J. Boyland, Jayanta K. Sahu, Seung-Hwan Chung, Johan Nilsson, and David N. Payne  »View Author Affiliations

Journal of the Optical Society of Korea, Vol. 13, Issue 4, pp. 416-422 (2009)

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We have demonstrated a highly efficient cladding-pumped ytterbium-doped fiber laser, generating >2.1 kW of continuous-wave output power at 1.1 μm with 74% slope efficiency with respect to launched pump power. The beam quality factor (M2) was better than 1.2. The maximum output power was only limited by available pump power, showing no evidence of roll-over even at the highest output power. We present data on how the beam quality depends on the fiber parameter, based on our current and past fiber laser developments. We also discuss the ultimate power-capability of our fiber in terms of thermal management, Raman nonlinear scattering, and material damage, and estimate it to 10 kW.

© 2009 Optical Society of Korea

OCIS Codes
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3510) Lasers and laser optics : Lasers, fiber

Original Manuscript: November 9, 2009
Revised Manuscript: November 23, 2009
Manuscript Accepted: November 23, 2009
Published: December 25, 2009

Yoon-Chan Jeong, Alexander J. Boyland, Jayanta K. Sahu, Seung-Hwan Chung, Johan Nilsson, and David N. Payne, "Multi-kilowatt Single-mode Ytterbium-doped Large-core Fiber Laser," J. Opt. Soc. Korea 13, 416-422 (2009)

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