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arXiv · 1206.5152

High power, continuous-wave, single frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm

M. Stappel·R. Steinborn·D. Kolbe·J. Walz
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Abstract

We present a high power single-frequency ytterbium fiber amplifier system with an output power of 30 W at 1091 nm. The amplifier system consists of two stages, a preamplifier stage in which amplified spontaneous emission is efficiently suppressed (>40 dB) and a high power amplifier with an efficiency of 52 %. Two different approaches of frequency doubling are compared. We achieve 8.6 W at 545.5 nm by single-pass frequency doubling in a MgO-doped periodically poled stoichiometric LiTaO3 and up to 19.3 W at 545.5 nm by frequency doubling with a lithium-triborate (LBO) crystal in an external enhancement cavity.

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M. Stappel, R. Steinborn, D. Kolbe, J. Walz. 2012-06-22. High power, continuous-wave, single frequency fiber amplifier at 1091 nm and frequency doubling to 545.5 nm. https://doi.org/10.1088/1054-660x%2F23%2F7%2F075103

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