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Jpn. J. Appl. Phys. 44 (2005) pp. L1529-L1531  |Previous Article| |Next Article|  |Table of Contents|
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Letter

Efficient High-Average-Power Operation of Q-Switched Cryogenic Yb:YAG Laser Oscillator

Shigeki Tokita, Junji Kawanaka, Masayuki Fujita¹, Toshiyuki Kawashima² and Yasukazu Izawa

Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
¹Institute for Laser Technology, 2-6 Yamadaoka, Suita, Osaka 565-0871, Japan
²Central Research Laboratory, Hamamatsu Photonics K.K., 5000 Hirakuchi, Hamakita, Shizuoka 434-8601, Japan

(Received September 7, 2005; accepted October 22, 2005; published December 2, 2005)

We have demonstrated a cryogenically cooled Q-switched Yb:YAG laser oscillator in a diode pump. A high average power of 74 W was obtained with a pulse energy of several mJ. The optical–optical efficiency was as high as 60%. The spatial beam profile was excellent at M²<1.4 with no additional compensation optics.

URL: http://jjap.jsap.jp/link?JJAP/44/L1529/
DOI: 10.1143/JJAP.44.L1529
KEYWORDS:diode-pumped laser, high-power laser, Yb:YAG, low temperature, Q-switched laser

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