10 kHz 40 W Ti:sapphire regenerative ring amplifier |
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Authors: | Matsushima Isao Yashiro Hidehiko Tomie Toshihisa |
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Institution: | Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono, Tsukuba, Japan. i.matsushima@aist.go.jp |
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Abstract: | A cryogenically cooled Ti:sapphire regenerative ring amplifier was developed as a laser for generating a laser-produced plasma light source. With a 10 kHz 180 W pump laser, the amplifier output is 40 W before compression and 26 W after compression. We believe it to be the current highest average-power output from a single stage Ti:sapphire amplifier. The effective focal length of the thermal lens is measured to be 2.2 m at 100 K for 180 W of pump power. With a 1 m focal length lens placed in the resonator, the effect of a thermal lens on the resonator mode is suppressed. High conversion efficiency is achieved for the whole pumping power range without any additional measures for thermal compensation. |
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