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http://dx.doi.org/10.3807/JOSK.2009.13.4.416

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

Jeong, Yoon-Chan (Optoelectronics Research Centre, University of Southampton)
Boyland, Alexander J. (Optoelectronics Research Centre, University of Southampton)
Sahu, Jayanta K. (Optoelectronics Research Centre, University of Southampton)
Chung, Seung-Hwan (Optoelectronics Research Centre, University of Southampton)
Nilsson, Johan (Optoelectronics Research Centre, University of Southampton)
Payne, David N. (Optoelectronics Research Centre, University of Southampton)
Publication Information
Journal of the Optical Society of Korea / v.13, no.4, 2009 , pp. 416-422 More about this Journal
Abstract
We have demonstrated a highly efficient cladding-pumped ytterbium-doped fiber laser, generating $>$2.1 kW of continuous-wave output power at 1.1 μm with 74% slope efficiency with respect to launched pump power. The beam quality factor ($M^2$) 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.
Keywords
High-power fiber laser; Ytterbium-doped fiber; Optical power scaling; Single-mode fiber laser;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 22  (Related Records In Web of Science)
Times Cited By SCOPUS : 13
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