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Proceedings Paper

High-power CO2 laser using a new negative-branch unstable resonator with a phase-unifying output coupler
Author(s): Yushi Takenaka; Masaki Kuzumoto; Koji Yasui
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Paper Abstract

A high power CO2 laser using a new negative-branch unstable resonator (M equals -1.5) is proposed and investigated both theoretically and experimentally. The resonator consists of a stepwise variable reflecting output coupler termed phase-unifying output coupler and a total reflector. A 5 kW CW laser beam with diffraction limited quality (2(theta) equals 0.45 mrad) is obtained, not affected by the focal point in the resonator. The misalignment angle to reduce the laser power to 95% is improved by a factor of 19 compared with a positive-branch unstable resonator (M equals 1.5) with a phase-unifying output coupler at the same resonator length.

Paper Details

Date Published: 1 May 1992
PDF: 11 pages
Proc. SPIE 1628, Intense Laser Beams, (1 May 1992); doi: 10.1117/12.58974
Show Author Affiliations
Yushi Takenaka, Mitsubishi Electric Corp. (Japan)
Masaki Kuzumoto, Mitsubishi Electric Corp. (Japan)
Koji Yasui, Mitsubishi Electric Corp. (Japan)

Published in SPIE Proceedings Vol. 1628:
Intense Laser Beams
Richard C. Wade; Peter B. Ulrich, Editor(s)

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