Short-pulse excimer laser performances and its applications: I. ophthamology

Marius Przybylski; Gabriel Simon

doi:10.1117/12.275097

26 May 1997 Short-pulse excimer laser performances and its applications: I. ophthamology

Marius Przybylski, Gabriel Simon

Proceedings Volume 2971, Ophthalmic Technologies VII; (1997) https://doi.org/10.1117/12.275097
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

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.

Citation Download Citation

Marius Przybylski and Gabriel Simon "Short-pulse excimer laser performances and its applications: I. ophthamology", Proc. SPIE 2971, Ophthalmic Technologies VII, (26 May 1997); https://doi.org/10.1117/12.275097

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