期刊
APPLIED OPTICS
卷 55, 期 21, 页码 5647-5651出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.55.005647
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资金
- Japan Society for the Promotion of Science (JSPS) [KAKENHI 22654050, 24540537, 23226002]
- Mitsubishi Foundation
- Yamada Science Foundation
- Grants-in-Aid for Scientific Research [24540537, 16K17845, 23226002] Funding Source: KAKEN
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 (similar to 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%). (C) 2016 Optical Society of America
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