✦ LIBER ✦

Pump/probe transmission measurements of corneal tissue during excimer laser ablation

✍ Scribed by G. H. Pettit; M. N. Ediger

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 464 KB
Volume: 13
Category: Article
ISSN: 0196-8092
DOI: 10.1002/lsm.1900130313

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✦ Synopsis

Transient changes in the transmission of a 355 nm probe pulse through corneal tissue during 193 nm ArF laser ablation have been examined. A significant decrease in collimated transmission of the probe beam was observed for time delays between 10 ns and 1 ms after the 193 nm laser pulse. At 10 ns delay the collimated probe transmission was 70% of the preablation level. Minimum collimated transmission (40%) was observed at 30 p s delay. Transmitted probe examination by both diode array and integrating sphere measurements indicate the observed attenuation is due to scattering of the incident probe beam and not due to absorption. The significant scattering at nanosecond delay times suggests onset of the ablation process during the ArF pulse. Scattering therefore may affect the deposition of the 193 nm radiation in the ablation target. o 1993 Wiley-Liss, hc.*

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