Temporal and spectral characteristics of a tunable LiF : $F_2^-$ colour-centre crystal laser

A theoretical and experimental investigation was made of the temporal and spectral characteristics of a tunable LiF crystal laser with $F_2^-$ colour centres. The temporal profiles of the output pulses overlapped considerably the pump laser pulses because of a large amplification cross section. A study was made of the influence of a change in the pump laser wavelength on the spectral and oscillation characteristics of the LiF : $F_2^-$ laser.