Abstract

During the past years high-energy, nanosecond OPOs have been the subject of numerous investigations because of their potential applications as powerful tunable sources [1]. However, they require short cavity length to achieve high conversion efficiency and large pump cross-section to avoid optical damages. So typical cavities correspond to high Fresnel number and produce beams of bad spatial quality. An increase in OPO output energy frequently leads to a reduction in OPO brightness.

© 2000 IEEE