Accession Number : AD0673840

Title :   PULSED ELECTRODELESS DISCHARGE AS A LIGHT SOURCE FOR LASER EXCITATION AND OBSERVATION OF THE CHARACTERISTICS OF LASER OUTPUT,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Chang Zung-kui, ; Yeh Mow-foh,

Report Date : 03 NOV 1967

Pagination or Media Count : 17

Abstract : An experiment was conducted to study the characteristics of electrodeless discharge tubes for use in ruby and Nd-glass laser operation. A discharge loop composed of a high-voltage low-inductance capacitor, a 2-3 microhenry primary inductance coil with multiple turns, and a coaxial quartz discharge tube was used. The discharge tube was filled with xenon or argon at 10 mm Hg or more. Discharging period was found to be 10 microsec or more using a type MY-50-3 capacitor of 0.2 microhenry internal inductance. The period can be decreased with a type MY-110-0.022 capacitor. Emission spectra of discharge tubes at various pressures and voltages were obtained with a quartz spectrograph. Analysis was made for emission spike, frequency mode, quasicontinuous damped oscillation, and threshold value of laser output. Application of electrodeless discharge tubes to lasers led to the following conclusions: (1) high-energy input is possible in discharge tubes; (2) repetition frequency of lasers is raised; (3) higher pumping efficiency with higher power can be achieved; (4) the discharge tube has a longer service life; and (5) emission spectra can be matched with absorption bands of various laser materials. (Author)

Descriptors :   (*LASERS, OPTICAL PUMPING), (*OPTICAL PUMPING, *DISCHARGE TUBES), ELECTRIC DISCHARGES, EMISSIVITY, SPECTROSCOPY, CHINA

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE