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.
Mode locking of a Nd:glass laser with LiF:F2-.
Lithium fluoride crystal containing 
F2− color centers 
(LiF:F2−) as a saturable absorber has been used for passive mode locking of a neodymium phosphate glass (Nd:glass) laser. Complete modulation, i.e., 100% depth, was achieved. The time resolution of the modulated laser output was studied using a photochron streak camera. 
LiF:F2− crystal optimization and a Nd:glass laser operating optimization were proposed. The use of color center crystals as saturable absorber shows promise.
Emission characteristics of an LiF: F2 colour centre laser in the visible
Abstract Energetic and spectral characteristics of an LiF : F 2 colour centre laser operating in the visible (λ ≈ 685 nm) are de-described. Optical gain coefficient of the crystal amounts to about 15 cm -1 at an F 2 -centres concentration of 5 × 10 17 cm -3 .