400nm飞秒激光在熔融石英中成丝产生高功率近紫外超连续辐射
Intense supercontinuum generation in near-ultraviolet range from 400 nm femtosecond laser filament array in fused silica
利用微透镜阵列将400nm飞秒激光脉冲聚焦在熔融石英中形成等离子体细丝，对产生的高功率近紫外超连续辐射进行了研究。研究表明，超连续辐射光谱与微透镜阵列和熔融石英之间的距离有很大关系，波长覆盖范围达到350-600nm，在55nm的波长范围内，光谱能量密度超过了1μJ/nm，而在20nm的波长范围内，可以超过几十μJ/nm。此外，还对微透镜阵列聚焦400nm飞秒激光产生超连续辐射的能量转换效率进行了研究，超连续辐射能量转换效率最高可达66%。
In this paper, intense supercontinuum (SC) in the range of near-ultraviolet is generated from filamentation by focusing 400 nm laser into fused silica with microlens array (MLA). The spectrum of the SC is shown to be sensitive to the distance between MLA and fused silica. In our optimal condition, the near-ultraviolet SC can cover a range of 350-600 nm, where a bandwidth of approximately 55 nm above 1 μJ/nm spectral energy density and 20 nm bandwidth with tens of μJ/nm are achieved. Besides, the energy conversion efficiency of the 400 nm laser to SC generation is further analyzed. A maximum conversion efficiency of 66% is obtained when the entrance face of fused silica is set around the focus of the MLA.
张在坤、李东伟、张楠、尹狄峰、王岩、郝作强、张晶、尹富康
物理学光电子技术
等离子体细丝微透镜阵列超连续辐射
femtosecond filamentationmicrolens arraysupercontinuum generation
张在坤,李东伟,张楠,尹狄峰,王岩,郝作强,张晶,尹富康.400nm飞秒激光在熔融石英中成丝产生高功率近紫外超连续辐射[EB/OL].(2017-05-24)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201705-1292.点此复制
评论