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1 May 1992 High-power CO2 laser using a new negative-branch unstable resonator with a phase-unifying output coupler
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Proceedings Volume 1628, Intense Laser Beams; (1992) https://doi.org/10.1117/12.58974
Event: OE/LASE '92, 1992, Los Angeles, CA, United States
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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yushi Takenaka, Masaki Kuzumoto, and Koji Yasui "High-power CO2 laser using a new negative-branch unstable resonator with a phase-unifying output coupler", Proc. SPIE 1628, Intense Laser Beams, (1 May 1992); https://doi.org/10.1117/12.58974
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