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Proceedings Paper

Femtosecond all-solid-state laser for refractive surgery
Author(s): Leander Zickler; Meng Han; Günter Giese; Frieder H. Loesel; Josef F. Bille
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Paper Abstract

Refractive surgery in the pursuit of perfect vision (e.g. 20/10) requires firstly an exact measurement of abberations induced by the eye and then a sophisticated surgical approach. A recent extension of wavefront measurement techniques and adaptive optics to ophthalmology has quantitatively characterized the quality of the human eye. The next milestone towards perfect vision is developing a more efficient and precise laser scalpel and evaluating minimal-invasive laser surgery strategies. Femtosecond all-solid-state MOPA lasers based on passive modelocking and chirped pulse amplification are excellent candidates for eye surgery due to their stability, ultra-high intensity and compact tabletop size. Furthermore, taking into account the peak emission in the near IR and diffraction limited focusing abilities, surgical laser systems performing precise intrastromal incisions for corneal flap resection and intrastromal corneal reshaping promise significant improvement over today's Photorefractive Keratectomy (PRK) and Laser Assisted In Situ Keratomileusis (LASIK) techniques which utilize UV excimer lasers. Through dispersion control and optimized regenerative amplification, a compact femtosecond all-solid-state laser with pulsed energy well above LIOB threshold and kHz repetition rate is constructed. After applying a pulse sequence to the eye, the modified corneal morphology is investigated by high resolution microscopy (Multi Photon/SHG Confocal Microscope).

Paper Details

Date Published: 19 June 2003
PDF: 14 pages
Proc. SPIE 4978, Commercial and Biomedical Applications of Ultrafast Lasers III, (19 June 2003); doi: 10.1117/12.478582
Show Author Affiliations
Leander Zickler, Univ. of Heidelberg (Germany)
20/10 Perfect Vision Optische Geraete (Germany)
Meng Han, Univ. of Heidelberg (Germany)
20/10 Perfect Vision Optische Geraete (Germany)
Günter Giese, Max-Planck-Institut für medizinische Forschung (Germany)
Frieder H. Loesel, 20/10 Perfect Vision Optische Geraete GmbH (Germany)
Josef F. Bille, Univ. of Heidelberg (Germany)


Published in SPIE Proceedings Vol. 4978:
Commercial and Biomedical Applications of Ultrafast Lasers III
Joseph Neev; Andreas Ostendorf; Christopher B. Schaffer, Editor(s)

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