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Single plasma mirror providing 104 contrast enhancement and 70% reflectivity for intense femtosecond lasers

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Abstract

To efficiently eliminate picosecond pre-pulses that accompany ultrashort pulses emitted from high-power chirped-pulse-amplification laser systems, we have developed a high-performance plasma mirror system. By reducing the reflectivity of the antireflection coating on the substrate for the plasma mirror to the limit of current technology (0.006%), we achieved the highest pre-pulse contrast enhancement reported to date for a single plasma mirror of 104 at 1 ps before the pulse peak. By optimizing the laser incidence to the plasma mirror and the laser fluence, the reflectivity of the plasma mirror has been improved to 70%. The contrast improvement indicates extensibility to 100 PW class lasers by doubling this plasma mirror system. Contrast enhancement of 108 should be possible without a serious reduction in energy (no more than 50%).

© 2016 Optical Society of America

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Corrections

Shunsuke Inoue, Kazuya Maeda, Shigeki Tokita, Kazuaki Mori, Kensuke Teramoto, Masaki Hashida, and Shuji Sakabe, "Single plasma mirror providing 104 contrast enhancement and 70% reflectivity for intense femtosecond lasers: publisher’s note," Appl. Opt. 55, 6435-6435 (2016)
https://opg.optica.org/ao/abstract.cfm?uri=ao-55-23-6435

18 July 2016: A correction was made to a formula within the body of the paper.


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