A high-contrast preamplifier based on optical-parametric amplification with a short pump pulse is demonstrated. A gain larger than 105 and measurement-limited contrast higher than 1011 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.
© 2007 Optical Society of America
Original Manuscript: April 30, 2007
Revised Manuscript: June 8, 2007
Manuscript Accepted: June 8, 2007
Published: July 23, 2007
C. Dorrer, I. A. Begishev, A. V. Okishev, and J. D. Zuegel, "High-contrast optical-parametric amplifier as a front end of high-power laser systems," Opt. Lett. 32, 2143-2145 (2007)