Diagnostics of pulse contrast for petawatt laser in SGII

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 高功率激光物理国家实验室

	Diagnostics of pulse contrast for petawatt laser in SGII
	Ouyang, Xiaoping ; Liu, Daizhong ; Zhu, Baoqiang ; Zhu, Jian ; Zhu, Jianqiang
	2015
会议名称	3rd biennial conference on high power lasers for fusion research
通讯作者	ouyang, xp (reprint author), chinese acad sci, shanghai inst opt & fine mech, joint lab high power laser & phys, shanghai 201800, peoples r china.
英文摘要	pulse contrast is an important parameter for ultrafast pulses. it shall be 10(8) or higher in order to avoid effect from noise before main pulse. diagnostics with cross-correlation can achieve high temporal resolution such as similar to 7fs. cross-correlation has advantage in pulse contrast measurement than autocorrelation because it can distinguish noise before or after main pulse. high dynamic range is also essential in pulse contrast measurement. cross-correlation signal from a single shot is converted into a signal series through fiber array, which can be analyzed by a set of a pmt and an oscilloscope. noise from nonlinear crystal and scatter needs decrease to improve dynamic range. and pulse power is also discussed in pulse contrast experiments. time delay tau is generated by travel stage in measurement for repetition pulses. then energy instability will generate error in this measurement. in measurement for single shot pulse, time delay t is generated by slant angle of beams. the scanning procession is completed with thousands parts of beam section within a single shot, and error will generated from no uniformity in near field. performance test of pulse contrast measurement is introduced in subsequent sections. temporal resolution is testified by self-calibration. dynamic range is judged by a parallel flat. at last pulse contrast of petawatt laser is diagnosed by a single shot cross-correlator with high confidence. the ratio is 10(-6) at 50ps before main pulse, and 10(-4) at 10ps before main pulse.
收录类别	CPCI
会议录	high power lasers for fusion research iii
会议录出版者	spie-int soc optical engineering
语种	英语
内容类型	会议论文
源URL	[http://ir.siom.ac.cn/handle/181231/17179]
专题	上海光学精密机械研究所_高功率激光物理国家实验室
作者单位	1.[Ouyang, Xiaoping 2.Liu, Daizhong 3.Zhu, Baoqiang 4.Zhu, Jianqiang] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Joint Lab High Power Laser & Phys, Shanghai 201800, Peoples R China 5.[Zhu, Jian] China Acad Engn Phys, Shanghai Inst Laser Plasma, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Ouyang, Xiaoping,Liu, Daizhong,Zhu, Baoqiang,et al. Diagnostics of pulse contrast for petawatt laser in SGII[C]. 见:3rd biennial conference on high power lasers for fusion research.