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Opt Lett. 2007 Aug 1;32(15):2143-5.

High-contrast optical-parametric amplifier as a front end of high-power laser systems.

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Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA.


A high-contrast preamplifier based on optical-parametric amplification with a short pump pulse is demonstrated. A gain larger than 10(5) and measurement-limited contrast higher than 10(11) are obtained over a large temporal range extending within less than 10 ps of the peak of the pulse, because of the high instantaneous parametric gain provided by a short pump pulse in a nonlinear crystal. The energy gain and high contrast of this preamplifier make it a good seed source for high-power laser systems.

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