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.
Cone-mirror resonator Q-switched operation.
Giant pulse Q-switched operation of a cone-mirror resonator has been performed. Measurement of the conventional output energy vs resonator length was obtained. The damage level of the dye cell's location is discussed. With some optimization and careful engineering, cone-mirror resonators have valuable advantages.