Abstract

Nanosecond pulsed optical parametric oscillators (OPOs) are very attractive sources for numerous applications of spectroscopy provided that stable single-mode operation is obtained. Although the output of a Q-switched OPO is naturally multimode, we show here that pulsed single-mode output can be achieved from a compact and rugged device based on a dual-cavity DROPO (doubly resonant optical parametric oscillator) This is of particular importance for pollutant detection and for non linear spectroscopy applications such as four-wave mixing diagnostics.

© 2000 IEEE