Accession Number : AD0679713

Title :   MEASURING THE POWER CHARACTERISTICS OF A LASER AMPLIFIER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mikaelyan,A. L. ; Turkov,Yu. G. ; Pogosyan,P. S.

Report Date : 04 JAN 1968

Pagination or Media Count : 7

Abstract : The master laser consisted of a ruby rod 120 mm long and 6.5 mm in diameter pumped by a 500-j flashlamp. The laser output was Q-switched by a rotating (20,000 rpm) prism and consisted of 0.2-j 50-nanosec pulses. The laser amplifier used ruby rods 120 and 240 mm long. The beam energy was measured by means of a calorimeter with a sensitivity of 300 microwatts/j. The gain of a 24-cm laser amplifier was shown to decrease with increasing output energy. To eliminate interference by regeneration, the rod ends were set at angles of 15-20 min. with the mirror. The maximum gain was observed at indication angles of about 5 min. Further increase to about 15 min. resulted in the traveling-wave operation. (Author)

Descriptors :   (*LASERS, POWER), RUBY, MEASUREMENT, PRISMS(OPTICS), CALORIMETERS, GAIN, MIRRORS, PULSES, USSR

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE