Abstract

We extend the operating regime of diode-pumped Nd:YAG lasers into the eye-safe region at 1.61 μm by using an efficient optical parametric oscillator in KTP. Total energy conversion efficiencies of the 1.06-μm pump to 1.61-μm signal and 3.1-μm idler approach 40%, with 25% converson to 1.61μm alone. This device has a wallplug efficiency of 0.8%, producing 2.5-mJ output energies at an eye-safe wavelength, and is readily scalable to higher energies.

© 1991 Optical Society of America

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