10  J operation of a conductive-cooled Yb:YAG active-mirror amplifier and prospects for 100  Hz operation

Jumpei Ogino; Shigeki Tokita; Shotaro Kitajima; Hidetsugu Yoshida; Zhaoyang Li; Shinji Motokoshi; Noboru Morio; Koji Tsubakimoto; Kana Fujioka; Ryosuke KODAMA; Junji Kawanaka

doi:10.1364/ol.414926

journal article Jan 26, 2021

10 J operation of a conductive-cooled Yb:YAG active-mirror amplifier and prospects for 100 Hz operation

Jumpei Ogino Shigeki Tokita Shotaro Kitajima

Hidetsugu Yoshida Zhaoyang Li

Shinji Motokoshi Noboru Morio Koji Tsubakimoto

Kana Fujioka Ryosuke KODAMA Junji Kawanaka

Optics Letters Vol. 46 No. 3 pp. 621 · Optica Publishing Group

View at Publisher Save 10.1364/ol.414926

Abstract

We report, to the best of our knowledge, the highest power conductive-cooled active-mirror amplifier (CcAMA) using Yb:YAG with a pulse energy of 10 J. By using four liquid-nitrogen circulating cooled laser heads, we achieved a repetition rate, pulse energy, and average power of 33.3 Hz, 9.3 J, and 310 W, respectively. The problem of wavefront distortion, which is difficult to solve with a large-aperture active-mirror laser, is suppressed by using reinforcing materials with the same thermal expansion coefficient. We have confirmed that the wavefront distortion is small (

0.15

λ

P-V per head) at 100 Hz operation, which paves the way for 100 Hz operation with the CcAMA concept.

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Metrics

31

Citations

14

References

Details

Published: Jan 26, 2021
Vol/Issue: 46(3)
Pages: 621
License: View

Authors

Photon Pioneers Center, Osaka University

J

Junji Kawanaka

Funding

JST-Mirai Program Award: JPMJMI17A1

Cite This Article

Jumpei Ogino, Shigeki Tokita, Shotaro Kitajima, et al. (2021). 10 J operation of a conductive-cooled Yb:YAG active-mirror amplifier and prospects for 100 Hz operation. Optics Letters, 46(3), 621. https://doi.org/10.1364/ol.414926

10 J operation of a conductive-cooled Yb:YAG active-mirror amplifier and prospects for 100 Hz operation

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