ACTIVE LASER MEDIUM ON BASE OF MONOCRYSTAL OF LITHIUM FLUORIDE FF COLOUR CENTERS AND PROCESS OF ITS PRODUCTION Russian patent published in 1995 - IPC

FIELD: quantum electronics. SUBSTANCE: active laser medium presents monocrystal of lithium fluoride containing FF₂ colour center. Concentration of FF₂ colour centers in medium in units of factor of optical absorption equals 100-700 cm^-1. For production of laser medium crysrals of lithium fluoride are irradiated with electron pulses. Electron energy is established from 0.08 to 0.7 MeV. Absorbed dose in this case corresponds to 0.710⁷ Gy to 5.010⁷ Gy. Proposed medium exhibits high concentration of FF₂ centers and low losses which increases service life, of laser element and gives possibility to create miniature elements. EFFECT: reduced pumping threshold and increased optical stability of color centers. 2 cl, 2 dwg