Accession Number : AD0681257

Title :   A 1 GW NEODYMIUM GLASS LASER,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mak,A. A. ; Malinin,G. G. ; Prilezhaev,D. S. ; Stepanov,A. I.

Report Date : 18 APR 1968

Pagination or Media Count : 5

Abstract : The system consists of a master laser and a two-stage laser amplifier. The master-laser head comprises a neodymium glass rod 20 mm in diameter and 260 mm long, an IFP-5000 2-kj flashlamp, and a cylindrical pump reflector. The amplifier heads are identical and in each case the active rod is bathed in an aqueous solution of sodium nitrite to retard uv-induced aging of crystals and to reduce thermal stresses. The output of the 100-cm-long resonator was passed through a 30% reflective stack and the Q-switching was done by means of a rotating prism (30,000 rpm) and a plane-parallel plate with an end reflector which also served as an angular selector. The master laser operated in the free-running mode at an efficiency of 3.5%, generating 140-150 MW 70 nanosec pulses with a 3-5 min of arc beam divergence. Seventy nanosec 500 MW and 1 GW pulses were obtained at the first and second (output) stages, respectively, for an 80 MW input. (Author)

Descriptors :   (*LASERS, NEODYMIUM), GLASS, LIGHT PULSES, POWER, PULSES, PRISMS(OPTICS), AMPLIFIERS, USSR

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE