Title :
TM010-mode microwave excited high power CO2 laser using a cylindrical resonant cavity
Author :
Ikeda, Tetsuya ; Danno, Minoru ; Shimazutsu, Hiroaki ; Abe, Takao ; Tanaka, Jiro
Author_Institution :
Adv. Technol. Res. Center, Mitsubishi Heavy Ind. Ltd., Yokohama, Japan
fDate :
11/1/1994 12:00:00 AM
Abstract :
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
Keywords :
carbon compounds; gas lasers; high-frequency discharges; laser cavity resonators; laser modes; 14 percent; 259 W; CO2; TM010-mode microwave excited high power CO2 laser; axial electric field; axial fast gas flow; axial laser beam; cylindrical resonant cavity; dielectric tube; efficiency; electric field; end plates; high power laser operation; homogeneous discharges; laser output; laser power conversion ratio; microwave discharges; program SUPERFISH; reentrant type tuners; resonant microwave cavity; two-cavity CO2 laser module; Dielectrics; Fluid flow; Gas lasers; Laser beams; Laser excitation; Laser tuning; Masers; Power lasers; Resonance; Tuners;
Journal_Title :
Quantum Electronics, IEEE Journal of
