Effect of nonideal wavefront on near filed beam quality disturbed by flaw in target system

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

	Effect of nonideal wavefront on near filed beam quality disturbed by flaw in target system
	Jiao, Zhaoyang ; Zhang, Yanli ; Zhang, Junyong ; Zhu, Jianqiang
	2013
会议名称	5th international symposium on photoelectronic detection and imaging (ispdi) - high power lasers and applications
通讯作者	jiao, zy (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	in high-power laser facilities for inertial confinement fusion, there are many large-diameter optical elements, which inevitably have some flaws on the surface. the beam is modulated by these flaws after diffraction transmission, thereby reducing the beam quality of the system. the optical field with high modulation may cause self-focusing in fused silica and thus damage the optical components, which seriously affects the load capacity of the device. therefore, for high-power laser systems, near field beam quality also has a high demand. in this paper, the effect of flaws and nonideal wavefront of sinusoidal modulation on the near-field quality at specific position behind the focusing lens is analyzed for final target system of high power laser device based on the huygens-fresnel diffraction theory. firstly the beam modulation of ideal wavefront disturbed by flaws is investigated. and the modulation by phase type flaw is more serious than amplitude type. secondly, near field beam modulation of nonideal wavefront of sinusoidal phase disturbed by flaws is analyzed. results demonstrate that under some specific conditions of sinusoidal phase, modulation degree is reduced and the beam quality is improved by the nonideal wavefront compared to the ideal wavefront. the results could give some references to the improvement of near field beam quality and mitigation of risk of optical damage caused by self-focusing.
收录类别	CPCI
会议录	international symposium on photoelectronic detection and imaging 2013: high power lasers and applications
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/181231/17167]
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.[Jiao, Zhaoyang 2.Zhang, Yanli 3.Zhang, Junyong 4.Zhu, Jianqiang] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Joint Lab High Power Laser & Phys, Shanghai 201800, Peoples R China
推荐引用方式 GB/T 7714	Jiao, Zhaoyang,Zhang, Yanli,Zhang, Junyong,et al. Effect of nonideal wavefront on near filed beam quality disturbed by flaw in target system[C]. 见:5th international symposium on photoelectronic detection and imaging (ispdi) - high power lasers and applications.