Accession Number : AD0678463

Title :   A 6-GW NEODYMIUM GLASS LASER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Vanyukov,M. P. ; Venchikov,V. A. ; Isaenko,V. I. ; Serbryakov,V. A.

Report Date : 05 JAN 1968

Pagination or Media Count : 5

Abstract : A 6-GW neodymium glass laser with a simple phototropic Q-switch is described. The laser consists of three cylindrical rods in series, each 250 mm long and 45 mm in diameter. Each rod is placed in a multielliptic reflector and is pumped by six direct flashlamps. The external cavity consists of one 99.6%-reflective dielectric mirror and a Q-switch placed between the first and second rods. The Q-switch consists of a cell made of two plane-parallel (error less than 1 min of arc) glass plates joined optically through a 1-cm-thick glass ring. The cell is filled with a polymethine-dye solution to a concentration at which the solution is 99% reflective at 1.06 micrometer. At maximum pumping energies, single 100-120-j, 20-nanosec pulses were obtained. By increasing the pumping energy or by diluting the absorber solution, two or more pulses could be generated. In the case of two-pulse operation (50-80 microsec. repetition frequency), the total output was 200 j. The use of a phototropic liquid switch and large-diameter neodymium glass rods resulted in energy and power densities of 6 j/sq cm and 0.3-0.4 Gw/sq cm, respectively.

Descriptors :   (*LASERS, POWER), LIGHT PULSES, NEODYMIUM, GLASS, DYES, OPTICAL PUMPING, USSR

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE