Wavelength dependence of femtosecond laser ablation threshold of corneal stroma
Wavelength dependence of femtosecond laser ablation threshold of corneal stroma
复制标题
DOI：
10.1364/oe.16.004121
复制
发表时间：
2008-03-17
期刊：
影响因子：
3.8
通讯作者：
Brunette, I.
中科院分区：
文献类型：
--
作者：
Olivie, G.;Giguere, D.;Brunette, I.
我们测量了由钛宝石泵浦的光参量放大器产生的波长在800 nm到1450 nm之间的100fs激光脉冲对猪角膜基质表面的消融阈值通量。消融阈值在该波长范围内变化很小，在1.5-2.2J/cm(2)之间。数据表明，波长最高可达1000 nm的消融阈值将迅速提高，随后更长波长的消融阈值将达到平台期。烧蚀过程的一个简单理论模型部分证实了这一行为。在此模型的基础上，讨论了波长对表面烧蚀物理的影响。(C)2008年美国光学学会。
We measure the surface ablation threshold fluence of porcine corneal stroma for 100 fs laser pulses, with wavelengths between 800 nm and 1450 nm, generated by a Ti:sapphire-pumped optical parametric amplifier. The ablation threshold was found to vary only slightly within this wavelength range, between 1.5 and 2.2 J/cm(2). The data suggest a rapid increase of the ablation threshold for wavelengths up to about 1000 nm, followed by a plateau for longer wavelengths. This behavior is partly confirmed by a simple theoretical model of the ablation process. The influence of the wavelength on the physics of surface ablation is discussed on the basis of the model. (C) 2008 Optical Society of America.