中国激光, 2019, 46 (5): 0508021, 网络出版: 2019-11-11
强飞秒激光在氟化钙晶体中产生的超连续谱 下载: 1106次
Supercontinuum Generation in Calcium Fluoride Crystals Using High-Intensity Femtosecond Laser
超快激光 飞秒激光成丝 超连续谱 光强钳制 晶体取向 ultrafast laser femtosecond laser filamentation supercontinuum intensity clamping crystal orientation
摘要
实验研究了不同入射激光能量和晶体取向条件下,强飞秒激光在氟化钙晶体中成丝产生的超连续谱。实验发现,由于晶体中存在光强钳制效应,在一定入射激光能量范围内,超连续谱的最大蓝移截止波长为300 nm,且不随能量发生变化。同时发现,该最大蓝移截止波长不依赖于晶体取向的变化,但超连续谱的强度将随晶体的取向发生明显变化。
Abstract
In this study, the supercontinuum generation in calcium fluoride (CaF2) crystals are measured during high-intensity femtosecond laser filamentation under different incident laser energies and various crystal orientations. The experimental results show that the maximum blue-shifted cut-off wavelength of the supercontinuum spectrum remains constant at 300 nm for a broad range of incident laser energies because of the intensity clamping effect. Moreover, the maximum blue-shifted cut-off wavelength is also independent on the crystal orientation, but the intensity of supercontinuum significantly varies with the crystal orientation.
李子熙, 龚成, 华林强, 柳晓军. 强飞秒激光在氟化钙晶体中产生的超连续谱[J]. 中国激光, 2019, 46(5): 0508021. Zixi Li, Cheng Gong, Linqiang Hua, Xiaojun Liu. Supercontinuum Generation in Calcium Fluoride Crystals Using High-Intensity Femtosecond Laser[J]. Chinese Journal of Lasers, 2019, 46(5): 0508021.