High power in-band pumped Er:YAG laser at 1617 nm
High power in-band pumped Er:YAG laser at 1617 nm
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DOI：
10.1364/oe.16.005807
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发表时间：
2007-06
期刊：
影响因子：
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通讯作者：
J. Kim;Deyuan Shen;J. Sahu;W. Clarkson
中科院分区：
文献类型：
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作者：
J. Kim;Deyuan Shen;J. Sahu;W. Clarkson
本文报道了由高功率包层泵浦的Er：Yb光纤激光器抽运的1617 nm带内Er：YAG激光器的功率定标的初步结果。在这项初步研究中，采用了一个简单的四镜折叠腔，包括一个安装在水冷铝散热器中的长29 mm，Er3+浓度为0.5at.%的Er：YAG棒，一个1617 nm高反射率和1532 nm高透过率的平面泵浦耦合镜，两个曲率半径100 mm，1617 nm高反射率的凹面镜，一个透过率为30%的1617 nm平面输出耦合器，以及一个100微米厚的熔融石英标准具。在Er，Yb光纤激光器的泵浦功率为68W时，获得了最大输出功率为23W的Er：Yb激光器。阈值泵浦功率为1.9W，斜率效率相对于入射泵浦功率为38%。据我们所知，这一结果代表了到目前为止从1617 nm的Er：YAG激光器所显示的最高输出功率。
In this paper, we report the preliminary results for power scaling of an Er:YAG laser at 1617 nm in-band pumped by a high-power cladding-pumped Er,Yb fibre laser. In this preliminary study, a simple four-mirror folded cavity was employed for the Er:YAG laser comprising a 29 mm long Er:YAG rod with 0.5 at.% Er3+ concentration mounted in a water-cooled aluminium heat-sink, a plane pump in-coupling mirror with high reflectivity at 1617 nm and high transmission at 1532 nm, two concave mirrors of 100 mm radius of curvature and high reflectivity at 1617 nm, a plane output coupler of transmission, 30% at 1617 nm, and a 100 mum thick fused silica etalon. The Er:YAG laser yielded a maximum output power of 23 W for 68 W of pump power from the Er,Yb fibre laser. The threshold pump power was 1.9 W and the slope efficiency with respect to incident pump power was 38%. To the best of our knowledge, this result represents the highest output power so far demonstrated from an Er:YAG laser at 1617 nm.