Efficiencies of Laser Dyes for Atomic Vapor Laser Isotope Separation.

Efficiencies of 30 laser dyes for the atomic vapor laser isotope Separation (AVLIS) are experimentally evaluated with a dye laser pumped by a frequency-doubled Nd : YAG laser. Onthe other hand, a simulation code is developed to describe the laser action of Rhodamine 6G, and the dependence of the laser efficiency on the pump wavelength is calculated. Followingconclusions are obtained by these considerations : space : 1) Pyrromethene 567 showed 16% higher laser efficiency than Rhodamine 6G by 532 nm pumping, and Pyrromethene 556 has anability to provide better efficiency by green light pumping with a Cu vapor laser; 2) Kiton red 620 and Rhodamine 640, whose efficiencies were almost the same as Rhodamine 6G by 532nm pumping, will show better efficiencies by two-wavelength pumping with a Cu vapor laser.