The influence of pump beam spatial modulation on angular divergence and temporal characteristics of subnanosecond gain-switched Ti: Sapphire laser was investigated. It was shown, that the change of Ti: Sapphire refraction index by pump light may result in considerable change of laser characteristics. Spatial modulation with frequencies > 15-20 mm-1 induce scattering in laser crystal and leads to the increase of angular divergence in lasers with flat resonator mirrors and large Fresnel number. At the same time induced scattering produces coupling of light within laser aperture, which can result in synchronous generation of all active volume and reduced laser pulse duration.
Access to SPIE eBooks is limited to subscribing institutions. Access is not available
as part of an individual subscription.