Wavelength dependence of femtosecond laser ablation threshold of corneal stroma

被引：52
|
作者：
Olivie, G. [1 ]
Giguere, D. [1 ]
Vidal, F. [1 ]
Ozaki, T. [1 ]
Kieffer, J. -C. [1 ]
Nada, O. [2 ]
Brunette, I. [3 ]
机构：
[1] Inst Natl Rech Sci Energie Varennes, Varennes, PQ J3X 1S2, Canada
[2] Ain Shams Univ, Dept Ophthalmol, Cairo 11566, Egypt
[3] Univ Montreal, Maisonneuve Rosement Hosp Res Ctr, Dept Ophthalmol, Montreal, PQ H1T 2M4, Canada
来源：
OPTICS EXPRESS | 2008年 / 16卷 / 06期
关键词：
D O I：
10.1364/OE.16.004121
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
引用
收藏
页码：4121 / 4129
页数：9
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