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Opt Express. 2008 Apr 14;16(8):5807-12.

High-power in-band pumped Er:YAG laser at 1617 nm.

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  • 1Optoelectronics Research Center, University of Southampton, Southampton, SO17 1BJ, UK.


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 M(2) approximately = 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 approximately 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.

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