We experimentally demonstrated the contrast enhancement in a Ti:sapphire chirped-pulse amplification (CPA) laser with a noncollinear femtosecond optical-parametric amplifier. A total gain of 3.4×104 and pulse energy of 26μJ were achieved. With the clean high-energy seeding pulse, the contrast ratio of the main amplified laser pulse to the amplified spontaneous emission in the Ti: sapphire CPA laser system was improved to around 1010 within the time scale of hundreds of picoseconds.
© 2010 Optical Society of America
Original Manuscript: May 19, 2010
Revised Manuscript: July 25, 2010
Manuscript Accepted: August 15, 2010
Published: September 9, 2010
Cheng Liu, Zhaohua Wang, Weichang Li, Qing Zhang, Hainian Han, Hao Teng, and Zhiyi Wei, "Contrast enhancement in a Ti:sapphire chirped-pulse amplification laser system with a noncollinear femtosecond optical-parametric amplifier," Opt. Lett. 35, 3096-3098 (2010)