DIRECT AND PASSIVE SUBNANOSECOND PULSE-TRAIN GENERATION FROM A SELF-INJECTION-SEEDED ULTRAVIOLET SOLID-STATE LASER

We propose a passive self-injection-seeding scheme for the generation of short-pulse trains from various pulsed lasers. In this scheme a sin gle subnanosecond pulse is generated from a short-cavity seeding laser . The pulse is then returned to the same gain medium and amplified reg eneratively until the gain is quenched completely. Cw operation capabi lity or an external short-pulse seeding laser is not required for gene ration of short-pulse trains. Based on this simple scheme an ultraviol et subnanosecond pulse train is directly and passively generated from a solid-state laser medium (Ce3+:LuLiF4) pumped by a standard 10-ns la ser.