Accession Number : ADA138057

Title :   Microwave Excitation of a CO2 Laser.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Page,R C

PDF Url : ADA138057

Report Date : Dec 1983

Pagination or Media Count : 98

Abstract : A flowing carbon dioxide laser was operated at low pressures up to 4 torr. Excitation of the laser was provided using various combinations of direct current (DC), pulsed microwave, and continuous wave (CW) microwave excitation. The microwaves were in the 2.45 GHz band and were coupled into the gas using a slow-wave interdigital transmission line. Laser output of 25 milliwatts (mw) was achieved using a DC discharge only. A combination of a DC discharge and pulsed microwaves doubled the output and resulted in some modulation. Changing the laser gas mixture and pulsed microwave field characteristics allowed some flexibility in the modulation. Lasing was not achieved with excitation from the CW microwaves alone due to the formation of localized discharges. Using pulsed microwaves to sustain the discharge and CW microwaves to pump the laser, a quasi-CW output of 55 mw was achieved. (Author)

Descriptors :   *Pulsed lasers, *Carbon dioxide lasers, *Excitation, *Infrared lasers, *Gas discharges, *Laser gases, Direct current, Microwaves, Continuous waves, Pulses, Nitrogen, Dual mode, Low pressure, Helium, Transmission lines, Electromagnetic fields, Glow discharges, Modulation, Mixtures, Electric arcs, Lasers, Theses

Subject Categories : Lasers and Masers
      Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE