《2016 High-power in-band pumped ErYAG laser at 1617 nm》.pdf

High-power in-band pumped Er:YAG laser at 1617 nm J. W. Kim, D. Y. Shen, J. K. Sahu, and W. A. Clarkson Optoelectronics Research Center, University of Southampton, Southampton, SO17 1BJ, UK jwk@orc.soton.ac.uk Abstract: High-power room-temperature operation of an Er:YAG laser at 1617 nm in-band pumped by a cladding-pumped Er,Yb fiber laser at 1532 nm is reported. The Er:YAG laser yielded 31 W of continuous-wave output in a beam with M2≈2.2 for 72 W of incident pump power. The threshold pump power was 4.1 W and the slope efficiency with respect to incident pump power was ~47 %. The influence of erbium doping level and resonator design on laser performance is discussed, and the prospects for further increase in output power and improvement in lasing efficiency are considered. ©2008 Optical Society of America OCIS codes: (140.0140) Lasers and laser optics; (140.3070) Infrared and far-infrared lasers; (140.3500) Lasers, erbium; (140.3510) Lasers, fiber; (140.3580) Lasers, solid-state. References and links 1. D. Y. Shen, J. K. Sahu, and W. A. Clarkson, “Highly efficient in-band pumped Er:YAG lasers with 60 W of output at 1645 nm,” Opt. Lett 31, 754-756 (2006). 2. D. Y. Shen, J. K. Sahu, and W. A. Clarkson, “Electro-optically Q-switched Er:YAG laser in-band pumped by an Er Yb fiber laser,” Advanced Solid-State Photonics 2006 Nevada WD4 (2006). 3. Y. E. Young, S. D. Setzler, K. J. Snell, P. A. Budni, T. M. Pollak, and E. P. Chicklis, “Efficient 1645 nm Er:YAG laser,” Opt. Lett. 29, 1075-1077 (2004). 4. S. D.