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Tunable 7–12-µm optical parametric oscillator using a Cr,Er:YSGG laser to pump CdSe and ZnGeP2 crystals

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Abstract

A CdSe optical parametric oscillator (OPO) pumped by a 2.79-µm, Cr,Er:YSGG laser yielded a 59% signal-plus-idler slope efficiency (η), a total idler output of 1.2–2.4 mJ between 8.5 and 12.3 µm, and an idler beam that was 2.2–2.5 times the diffraction limit. A ZnGeP2 OPO operated with a lower threshold, η=29%, and a forward idler output of 0.7–2.4 mJ from 6.9 to 9.9 µm. The signal and idler bandwidths were typically 4 cm-1 for each OPO.

© 1997 Optical Society of America

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