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Proceedings Paper

In-situ monitoring of the mid-IR laser ablation of cataract-suffered human lens by optical coherent tomography
Author(s): Vladislav A. Kamensky; Valentin M. Gelikonov; Grigory V. Gelikonov; Felix I. Feldchtein; Alexander M. Sergeev; Kirill I. Pravdenko; Nikolai Artemiev; Nikita M. Bityurin; I. V. Skripachev; A. A. Pushkin; G. E. Snopatin
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Paper Abstract

We have designed a laser complex which is a combination of a YAG:Er laser operating in the free-running mode, a radiation delivery system based on a chalcogenide fiber with uniquely high damage threshold, and a diagnostic optical coherent tomography (OCT) device for in situ monitoring of surface layers of the tissue under treatment. A flexible chalcogenide glass multimode fiber operates with a pulse energy of 150 mJ at a repetition rate of 3 Hz. Neither degradation nor laser damage were observed after transmission of 104 laser pulses through the fiber delivery instrument. This complex was employed to study the effect of the radiation of a YAG:Er laser and some other mid-IR lasers on a cataract-suffered human lens. The pulse- to-pulse kinetics of the laser tissue treatment process with a scanning depth of several millimeters and spatial resolution of 15 micrometers was investigated.

Paper Details

Date Published: 5 December 1996
PDF: 8 pages
Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); doi: 10.1117/12.260875
Show Author Affiliations
Vladislav A. Kamensky, Institute of Applied Physics (Russia)
Valentin M. Gelikonov, Institute of Applied Physics (Russia)
Grigory V. Gelikonov, Institute of Applied Physics (Russia)
Felix I. Feldchtein, Institute of Applied Physics (Russia)
Alexander M. Sergeev, Institute of Applied Physics (Russia)
Kirill I. Pravdenko, Institute of Applied Physics (Russia)
Nikolai Artemiev, Institute of Applied Physics (Russia)
Nikita M. Bityurin, Institute of Applied Physics (Russia)
I. V. Skripachev, Institute of Chemistry of High-Purity Substances (Russia)
A. A. Pushkin, Institute of Chemistry of High-Purity Substances (Russia)
G. E. Snopatin, Institute of Chemistry of High-Purity Substances (Russia)


Published in SPIE Proceedings Vol. 2930:
Lasers in Ophthalmology IV
Reginald Birngruber; Adolf Friedrich Fercher; Philippe Sourdille M.D., Editor(s)

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