High-temporal contrast using low-gain optical parametric amplification

Opt Lett. 2009 Aug 1;34(15):2273-5. doi: 10.1364/ol.34.002273.

Abstract

We demonstrate the use of low-gain optical parametric amplification (OPA) as a means of improving temporal contrast to a detection-limited level 10(-10). 250 microJ, 500 fs pulses of 1053 nm are frequency doubled and subsequently restored to the original wavelength by OPA with >10% efficiency.