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Proceedings Paper

Short-pulse excimer laser performances and its applications: I. ophthamology
Author(s): Marius Przybylski; Gabriel Simon
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Paper Abstract

A new very small powerful air-cooled excimer laser (193, 248, 308 nm) with metal-ceramic technology was developed by ATL Lasertechnik in Germany. The laser won 1995 Prize for the best innovation awarded by German federal states of Berlin & Brandenburg. The pulse energy of 10 - 20 mJ at high rep rates (200 - 500 Hz) from an active volume of only 1 cm3 are reached. The raw laser beam produces energy density of > 100 mJ/cm2 which is comparable to the performance of standard (large) excimer lasers. Its very short pulse length (3 ns), permits extremely high peak power density (30 MW/cm2). The ATLEX SP laser uses a new type of pre-ionization technique providing high beam homogeneity at low discharge voltages. Small footprint and weight, low operation costs opens up new industrial (micro-machining) and biomedical applications. Recently the ATLEX SP laser (193 nm) has been used for corneal refractive surgery. The setup consists of splitting a 193 nm laser beam into couples of beams which simultaneously ablates the corneal surface in a symmetrical scan-like fashion. Refractive changes up to 20 diopters were realized. Results of an analysis by corneal topography showed homogeneous ablation throughout the entire ablation zone.

Paper Details

Date Published: 26 May 1997
PDF: 6 pages
Proc. SPIE 2971, Ophthalmic Technologies VII, (26 May 1997); doi: 10.1117/12.275097
Show Author Affiliations
Marius Przybylski, ATL Lasertechnik GmbH (Germany)
Gabriel Simon, Institute of Ophthalmology (Spain)

Published in SPIE Proceedings Vol. 2971:
Ophthalmic Technologies VII
Pascal O. Rol; Karen Margaret Joos M.D.; Fabrice Manns, Editor(s)

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