LiF: F(2)- as a high repetition rate Ng: YAG laser passive modulator.
30-pps 30-mJ 10-ns FWHM pulses have been obtained in Nd:YAG laser systems with LiF crystal containing F(2)- color centers as the passive Q-Switch modulator. The saturation level of F(2)- color centers in the host crystal and the annealing phenomena of LiF: F(2)-(2) crystal were investigated. These observations make this room temperature stable color center crystal superb as a high power, high repetition rate neodymium laser passive modulator.
Spectral composition of the radiation emitted from a concentrated LiNdLa phosphate glass laser with a Q switch made of an LiF crystal with F2− centers
An investigation was made of the emission spectrum of a concentrated LiNdLa phosphate glass laser with Q switching in an LiF crystal containing color centers. In the absence of selection the spectral width was ~4.0 cm−1. The use of a resonant reflector as the exit mirror of the laser ensured single-frequency emission with a probability of 70%. Similar investigations were carried out also on an YAG:Nd3+ laser.
Tunable lasers utilizing color centers in ionic crystals (review)
A review is given of investigations of tunable lasers utilizing color centers in ionic crystals. An analysis is made of the microstructure, spectral, luminescence, and kinetic properties of various complex electron color centers in alkali-halide crystals and alkaline-earth fluoride crystals used or capable of being used as active media in near infrared tunable lasers. Possible causes of optical and thermal instability are discussed for centers having diiferent structures and methods of improving the stability are considered. The parameters of existing color center lasers are presented and the prospects for their development and application are discussed.