The general goal of this grant is to undertake research on the generation of tunable visible, infrared, and ultraviolet light, and on the control of this light by means of novel mode-locking and modulation techniques. during this reporting period the following projects have been active: (l) transient mode-locking of the Nd: YAG laser and generation of short tunable pulses in the visible;(2) investigations of the alkali metal inert gas exciter laser systems;(J) techniques for frequency conversion of high power and high energy laser radiation;and (4) high average power blue and UV laser light sources. These projects are described in detail in Section II of this report. Although the coherent vacuum ultraviolet holography project is currently inactive, a paper based on that work has been submitted for publication. It is entitled "Effects of Focusing on Third Order Nonlinear Processes in Isotropic Media" by G. C. Bjorklund and is attached as Appendix A.
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