Abstract

Tunable narrow-band cw difference-frequency generation at 8.7 μm was demonstrated in silver gallium selenide (AgGaSe2) at room temperature. The crystal was pumped by an injection-seeded Er/Yb-codoped fiber amplifier at 1.554 μm and a fiber-coupled diode-pumped monolithic ring Nd:YAG laser at 1.319 μm. The difference-frequency output was used for high-resolution spectroscopy of sulfur dioxide (SO2).

© 1996 Optical Society of America

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