Nature of the losses in generation at F/sub 2//sup +/ centers in LiF crystals

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · J. Appl. Spectrosc. (Engl. Transl.); (United States)

OSTI ID:5634963

Ivanov, N A; Lokhnygin, V D; Fomichev, A A; Khulugurov, V M; Chernyago, B P

The authors investigate the decrease in generating power in a tunable lithium fluoride laser with F centers during its operation. The following reasons for decreasing power are considered: temperature quenching of the luminescence by overheating of the generation channel at a high repetition rate of the pumping pulses; reorientation of the F centers by linearly polarized pumping radiation; photodisintegration of the F centers under the influence of pumping radiation; thermooptical inhomogeneities induced in the generation channel by the pumping radiation; and induced absorption in the spectral range of generation and pumping. The investigation was made on three types of LiF crystals: LiF-(OH) in which gamma radiation was used to produce F centers stabilized by the radiolysis products of the hydroxyl; LiF in which F centers were produced immediately before the experiment by heating to 300 K the irradiated crystal; and LiF in which F centers were generated by the pumping radiation through two-step ionization.

• OSTI ID: 5634963
• Journal Information: J. Appl. Spectrosc. (Engl. Transl.); (United States), Journal Name: J. Appl. Spectrosc. (Engl. Transl.); (United States) Vol. 46:2; ISSN JASYA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602 -- Other Materials-- Structure & Phase Studies
360603 -- Materials-- Properties
360605 -- Materials-- Radiation Effects
42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALKALI METAL COMPOUNDS
AMPLIFICATION
CHEMICAL REACTIONS
COLOR CENTERS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DECOMPOSITION
ELECTROMAGNETIC RADIATION
EMISSION
ENERGY LOSSES
F CENTERS
FLUORIDES
FLUORINE COMPOUNDS
GAIN
GAMMA RADIATION
HALIDES
HALOGEN COMPOUNDS
IONIZATION
IONIZING RADIATIONS
IRRADIATION
LASER MATERIALS
LASERS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
LOSSES
LUMINESCENCE
MATERIALS
MATERIALS TESTING
OPTICAL PUMPING
PHOTOCHEMICAL REACTIONS
PHOTOIONIZATION
PHOTOLYSIS
PHOTON EMISSION
PHYSICAL RADIATION EFFECTS
POINT DEFECTS
PUMPING
RADIATION EFFECTS
RADIATIONS
SOLID STATE LASERS
TEMPERATURE EFFECTS
TESTING
TUNING
VACANCIES