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Proceedings Paper

High-power Er:YAG laser at 1646 nm pumped by an Er, Yb fiber laser
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Paper Abstract

In this paper we describe an Er:YAG laser pumped by a tunable, cladding-pumped Er,Yb fiber laser and discuss factors affecting the laser performance. Crystals with different Er3+-concentrations in the range 0.5% to 4 at% and with crystal lengths selected for ~95% absorption of the pump light at 1532nm were used, and the laser performance was investigated for a range of output coupler transmissions (2-30%) at 1646nm. In preliminary experiments we have achieved a maximum output power of 4W at 1646nm for 11W of absorbed pump power corresponding to an efficiency of 36%, using a crystal with 0.5at% Er3+-concentration and an output coupler transmission of 10%. Our experiments have revealed that the cw efficiency decreases quite markedly for higher Er3+-concentrations. The origin this behavior is currently the subject of a detailed experimental investigation and our preliminary findings will be presented. The prospects for further increase in output power and efficiency will also be discussed.

Paper Details

Date Published: 23 December 2004
PDF: 11 pages
Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); doi: 10.1117/12.578217
Show Author Affiliations
Peter Jander, Univ. of Southampton (United Kingdom)
Jayanta K. Sahu, Univ. of Southampton (United Kingdom)
W. Andrew Clarkson, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 5620:
Solid State Laser Technologies and Femtosecond Phenomena
Jonathan A. C. Terry; W. Andrew Clarkson, Editor(s)

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