Wavelength dependence of femtosecond laser ablation threshold of corneal stroma | Zendy

G. Olivié | Zendy; Dominic Giguère | Zendy; François Vidal | Zendy; T. Ozaki | Zendy; J. C. Kieffer | Zendy; Ossama Nada | Zendy; Isabelle Brunette | Zendy

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Wavelength dependence of femtosecond laser ablation threshold of corneal stroma

Author(s) -

G. Olivié,

Dominic Giguère,

François Vidal,

T. Ozaki,

J. C. Kieffer,

Ossama Nada,

Isabelle Brunette

Publication year - 2008

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.16.004121

Subject(s) - optics , materials science , ablation , wavelength , femtosecond , fluence , laser , laser ablation , sapphire , optoelectronics , physics , engineering , aerospace engineering

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.

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