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TM010-mode microwave excited high power CO2 laser using a cylindrical resonant cavity

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5 Author(s)
T. Ikeda ; Adv. Technol. Res. Center, Mitsubishi Heavy Ind. Ltd., Yokohama, Japan ; M. Danno ; H. Shimazutsu ; T. Abe
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Microwave discharges for excitation of CO2 lasers have been investigated. A resonant microwave cavity (2.45 GHz) has been employed to get high power laser operation. Laser experiments using a system composed of axial fast gas flow, axial electric field, and axial laser beam have been performed. Homogeneous discharges have been obtained by a TM010-mode cavity with reentrant type tuners on the both end plates. Calculations of the electric field inside the cylindrical cavity filled with a dielectric tube using the program SUPERFISH were compared with the results of the measurements. The laser output of 259 W and the efficiency of 14% (rf power to laser power conversion ratio) were obtained from a newly developed two-cavity CO2 laser module

Published in:

IEEE Journal of Quantum Electronics  (Volume:30 ,  Issue: 11 )