Efficient 30-W, 140-MHz rf amplifier for cw CO/sub 2/ waveguide laser excitation

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1139912· OSTI ID:6742505

Hochuli, U E; Haldemann, P R

Details of a 30-W, 140-MHz rf amplifier for cw CO/sub 2/ waveguide laser excitation are presented. The amplifier delivers 30 W into a 50-..cap omega.. load while requiring only 40 W of dc power from a 28-V supply and 100 mW of rf drive power for an overall efficiency of 75%. A coupling-starting network design theory is given that provides the initiation over voltage for the discharge plasma from an rf power source of limited output voltage capability. The network then matches the drive circuit to the new input impedance of the operating discharge without any adjustments. This design theory applies to the whole class of networks whose losses can be approximated by a loss conductance in parallel with the gas discharge.

• Research Organization: Electrical Engineering Department, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6742505
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 59:11; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
AMPLIFIERS
CARBON DIOXIDE LASERS
DESIGN
EFFICIENCY
ELECTRIC DISCHARGES
ELECTRICAL PUMPING
ELECTRONIC EQUIPMENT
EQUIPMENT
GAS LASERS
LASER CAVITIES
LASERS
PUMPING
RF SYSTEMS