Accession Number : ADB058773

Title :   Thermal Techniques for the Intermediate Gain Operation of Nd: YAG.

Descriptive Note : Final rept. Jul 79-Oct 80,

Corporate Author : GENERAL ELECTRIC CO BINGHAMTON NY AIRCRAFT EQUIPMENT DIV

Personal Author(s) : Burnham, Geoffrey T.

Report Date : MAR 1981

Pagination or Media Count : 45

Abstract : Elevated temperature operation of Nd: YAG has been demonstrated to be an effective means of reducing its specific gain. This reduction in gain permits greater energy storage prior to ASE saturation with a corresponding increase in Q-switched energy output. In terms of increased energy storage a uniform elevated temperature resulted in increased energy storage proportional to the increase in line width. This was not observed with axial gradient operation where, although the longitudinal gain was effectively reduced, the energy storage did not increase in the same ratio. It is proposed that this is due to the cooler end regions of the YAG rod, although seeing a lower longitudinal gain, still exhibit the same unreduced lateral gain permitting localized depletion of the inversion by circumferential modes. (Author)

Descriptors :   *NEODYMIUM LASERS, *YAG LASERS, *GAIN, HIGH TEMPERATURE, Q SWITCHING, ENERGY, EFFICIENCY, LASER PUMPING.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE