Control of the parameters of solid-state lasers by dynamic gratings in a DKDP crystal

Pulsed acid cw Nd3+:YAG lasers were used in an experimental investigation o f the influence of dynamic gratings in intracavity DKDP crystal elements on the main characteristics of the radiation emitted by solid-state lasers at room temperature. A hologram, formed in a DKBP crystal by a two-beam metho d, induced generation of pulsed laser radiation which had the spectral char acteristics of a signal beam injected from outside in the form of radiation from a cw Nd3+:YAG laser, In experiments on a cw Nd3+:YAG laser the format ion of a phase grating resulted in selection of transverse radiation modes. Such selection made the repetition period of the lasing spikes more regula r and reduced their duration. A study was made of the dependence of the amp litude of a photoinduced electric field, inducing photorefraction, on the p olarisation of the radiation of the 1.06 mu m wavelength. The formation of phase gratings in a DKDP crystal was the effect of excitation of impurity c entres. The results obtained indicated feasibility of extending the range o f control functions which can be performed by DKDP crystal elements.