New semiconductor diode laser emitting at 2 um for microsurgery applications

Pier Giorgio Gobbi; D. Ragazzi; Claudio Azzolini; Giuseppe Trabucchi; Rosario Brancato

doi:10.1117/12.229580

10 January 1996 New semiconductor diode laser emitting at 2 um for microsurgery applications

Pier Giorgio Gobbi, D. Ragazzi, Claudio Azzolini, Giuseppe Trabucchi, Rosario Brancato

Proceedings Volume 2632, Lasers in Ophthalmology III; (1996) https://doi.org/10.1117/12.229580
Event: BiOS Europe '95, 1995, Barcelona, Spain

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.

Citation Download Citation

Pier Giorgio Gobbi, D. Ragazzi, Claudio Azzolini, Giuseppe Trabucchi, and Rosario Brancato "New semiconductor diode laser emitting at 2 um for microsurgery applications", Proc. SPIE 2632, Lasers in Ophthalmology III, (10 January 1996); https://doi.org/10.1117/12.229580

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