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

Peter Jander; Jayanta K. Sahu; W. Andrew Clarkson

doi:10.1117/12.578217

23 December 2004 High-power Er:YAG laser at 1646 nm pumped by an Er,Yb fiber laser

Peter Jander, Jayanta K. Sahu, W. Andrew Clarkson

Proceedings Volume 5620, Solid State Laser Technologies and Femtosecond Phenomena; (2004) https://doi.org/10.1117/12.578217
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

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.

Citation Download Citation

Peter Jander, Jayanta K. Sahu, and W. Andrew Clarkson "High-power Er:YAG laser at 1646 nm pumped by an Er,Yb fiber laser", Proc. SPIE 5620, Solid State Laser Technologies and Femtosecond Phenomena, (23 December 2004); https://doi.org/10.1117/12.578217

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