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Proceedings Paper

New semiconductor diode laser emitting at 2 um for microsurgery applications
Author(s): Pier Giorgio Gobbi; D. Ragazzi; Claudio Azzolini; Giuseppe Trabucchi; Rosario Brancato
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Paper Abstract

A surgical laser instrument is presented, based on a semiconductor diode emitting in the spectral region around 2 micrometer, in continuous mode. At this wavelength tissue absorption is via histological water, and the interaction is purely thermal. A portable laser station was built, emitting up to 250 mW of optical power at 1.94 micrometers, out of the tip of a low- hydroxil fused-silica optical fiber of 200 micrometer diameter. Experiments have been performed both in vitro with enucleated porcine eyes and in vivo, on rabbits and rats. In vitreo-retinal surgery, retinectomies and incisions of epiretinal fibrotic membranes have been achieved. At reduced output power the laser radiation has been applied to the welding of tissues, in particular cornea, sclera and skin, with interesting results. This new laser source, characterized by ergonomic advantages like compactness, portability, long lifetime, reduced maintenance, is potentially attractive for a number of microsurgical procedures like micro- incisions, shallow coagulations, and welding of hydrated biological membranes.

Paper Details

Date Published: 10 January 1996
PDF: 4 pages
Proc. SPIE 2632, Lasers in Ophthalmology III, (10 January 1996); doi: 10.1117/12.229580
Show Author Affiliations
Pier Giorgio Gobbi, Laser Medicine Research (Italy)
D. Ragazzi, Laser Medicine Research (Italy)
Claudio Azzolini, Istituto Scientifico Ospedale San Raffaele (Italy)
Giuseppe Trabucchi, Istituto Scientifico Ospedale San Raffaele (Italy)
Rosario Brancato, Istituto Scientifico Ospedale San Raffaele (Italy)


Published in SPIE Proceedings Vol. 2632:
Lasers in Ophthalmology III
Reginald Birngruber; Adolf Friedrich Fercher, Editor(s)

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