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High-contrast 1.16 PW Ti:sapphire laser system combined with a doubled chirped-pulse amplification scheme and a femtosecond optical-parametric amplifier

Zhaohua Wang, Cheng Liu, Zhongwei Shen, Qing Zhang, Hao Teng, and Zhiyi Wei

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Abstract

Based on a combined scheme of doubled chirped-pulse amplification and a femtosecond noncollinear optical- parametric amplifier, a high-contrast femtosecond laser pulse with energy of up to 32.3 J has been generated by improving the gain efficiency and boosting the pump energy to 120 J in the final amplifier. Our measurements show that the contrast ratio of the main laser pulse is around 1010 within the time scale of −400 ps and the duration of compressed pulse is 27.9 fs, corresponding to a peak power of 1.16 PW.

© 2011 Optical Society of America

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