High-power 5-um-band CO laser and its new hollow waveguides for industrial applications

Shunichi Sato; Kouki Shimizu; Yi-Wei Shi; Mitsunobu Miyagi

doi:10.1117/12.308088

12 May 1998 High-power 5-μm-band CO laser and its new hollow waveguides for industrial applications

Shunichi Sato, Kouki Shimizu, Yi-Wei Shi, Mitsunobu Miyagi

Proceedings Volume 3268, Gas and Chemical Lasers and Intense Beam Applications; (1998) https://doi.org/10.1117/12.308088
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

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.

Citation Download Citation

Shunichi Sato, Kouki Shimizu, Yi-Wei Shi, and Mitsunobu Miyagi "High-power 5-μm-band CO laser and its new hollow waveguides for industrial applications", Proc. SPIE 3268, Gas and Chemical Lasers and Intense Beam Applications, (12 May 1998); https://doi.org/10.1117/12.308088

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