Abstract

The generation of coherent UV radiation has typically required large, expensive laser systems. By quadrupling the output of a passively-Q-switched microchip laser,¹ we have demonstrated 0.5-µJ UV pulses of 250-ps duration from a 3-cm-long×1-cm-diamfiter package. The device, illustrated in Fig. is pumped by a 1.2-W fiber-coupled diode laser and operates in a single-frequency, linearly polarized, diffraction-limited mode at pulse repetition rates up to 13 kHz over a temperature range of >70°C.

© 1995 Optical Society of America