Broadband intracavity-absorption spectroscopy is demonstrated in a singly idler-resonant optical parametric oscillator made of β-barium borate, pumped by the third harmonic of an injection-seeded Q-switched Nd:YAG laser. IR 1.53-μm absorption of idler radiation by transitions of acetylene is detected with enhanced sensitivity in the upconverted spectrum of the signal radiation at 461 nm. Quantitative comparison of computer-simulated pulse-energy spectra with experimental absorption spectra indicates that the experimental detection sensitivity is close to the theoretical limit.
© 1993 Optical Society of America
Original Manuscript: January 8, 1992
Revised Manuscript: April 7, 1993
Published: September 1, 1993
K.-J. Boller and T. Schröder, "Demonstration of broadband intracavity spectroscopy in a pulsed optical parametric oscillator made of β-barium borate," J. Opt. Soc. Am. B 10, 1778-1784 (1993)