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Proceedings Paper

High-power 5-um-band CO laser and its new hollow waveguides for industrial applications
Author(s): Shunichi Sato; Kouki Shimizu; Yi-Wei Shi; Mitsunobu Miyagi
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Paper Abstract

Recent progress in the developments of the 5-micrometers -band high-power CO laser and its flexible beam delivery system is reviewed. At a room temperature, a specific laser output of 4.0 W/cm3 is achieved with an rf-to-optical efficiency of 17%, based on a fast-axial-flow, rf discharge excitation scheme. The performance is compared with that taken when the device was operated as a CO2 laser. It is shown that the output performance of the CO laser is comparably high to that of the CO2 laser and a high slope efficiency of 28% is achieved. The output has been scaled to over 1 kW. For flexible beam delivery of the CO laser, cyclic-olefin- polymer (COP)-coated hollow fibers are newly developed. The initial power transmission experiment shows that the COP- coated hollow fibers are capable of transmitting a CO-laser power of > 200 W at a low transmission loss of approximately 0.4 dB/m.

Paper Details

Date Published: 12 May 1998
PDF: 10 pages
Proc. SPIE 3268, Gas and Chemical Lasers and Intense Beam Applications, (12 May 1998); doi: 10.1117/12.308088
Show Author Affiliations
Shunichi Sato, Institute of Research and Innovation (Japan)
Kouki Shimizu, Institute of Research and Innovation (Japan)
Yi-Wei Shi, Tohoku Univ. (Japan)
Mitsunobu Miyagi, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 3268:
Gas and Chemical Lasers and Intense Beam Applications
Ernest A. Dorko; Jeffrey L. Moler, Editor(s)

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