Abstract
Optical parametric oscillators (OPOs) have established themselves as efficient, reliable, solid-state sources of tunable radiation.1 They have demonstrated tuning ranges that are unmatched by any laser source; however, they tend to have fairly broad linewidths that depend strongly on the output wavelength. OPO linewidths typically range from a few cm−1 to well over 100 cm−1,(2–3) and many important uses for tunable radiation, such as high resolution spectroscopy, lidar, industrial sensing, etc., require bandwidths narrower than this. We present an OPO that generates light over 0.7 to 0.9 μm, and 1.4 to 2.2 μm with transform-limited bandwidth operating on a single-longitudinal mode (SLM) of its resonator (the OPO output has a bandwidth <0.02 cm−1).
© 1992 Optical Society of America
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