中国物理B ›› 2017, Vol. 26 ›› Issue (7): 74213-074213.doi: 10.1088/1674-1056/26/7/074213
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
Dongwei Li(李东伟), Lanzhi Zhang(张兰芝), Saba Zafar, He Song(宋鹤), Zuoqiang Hao(郝作强), Tingting Xi(奚婷婷), Xun Gao(高勋), Jingquan Lin(林景全)
Dongwei Li(李东伟)1, Lanzhi Zhang(张兰芝)1, Saba Zafar1, He Song(宋鹤)1, Zuoqiang Hao(郝作强)1, Tingting Xi(奚婷婷)2, Xun Gao(高勋)1, Jingquan Lin(林景全)1
摘要:
An intense supercontinuum (SC) in the near-ultraviolet range is generated from filamentation by focusing a 400-nm laser into fused silica with a microlens array (MLA). The spectrum of the SC is shown to be sensitive to the distance between the MLA and fused silica. In our optimal conditions, the near-ultraviolet SC can cover a range of 350–600 nm, where a bandwidth of approximately 55 nm above the 1μ J/nm spectral energy density and 20 nm bandwidth with tens ofμJ/nm are achieved. In addition, the energy conversion efficiency of the 400 nm laser for 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.
中图分类号: (Beam trapping, self-focusing and defocusing; self-phase modulation)