Share Email Print
cover

Proceedings Paper

Spherical diffusing probes for high-peak-power copper vapor/dye laser systems
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Copper vapor/dye systems are used for photodynamic therapy because they can produce several watts of light at 630 nm with high efficiency. In contrast to continuous wave argon/dye laser systems, the pulsed Cu/dye systems have a peak power 10,000 higher than the average power. Because no commercial spherical diffusing fibers guaranteed at these peak powers were available to us, we developed high power diffusers ourselves. The probes, with diameters up to 3.7 mm on 600 micrometers fibers, have an improved thermal behavior. The output is 50 - 60% of the laser beam input. Tested with input powers up to 6 W, no damage occurred for exposure times over 15 minutes. The isotropy of the probes varied between within 1% and 25% (sd) on average. We have successfully started photodynamic therapy in patients with carcinoma in situ in the bladder using these probes.

Paper Details

Date Published: 1 June 1992
PDF: 5 pages
Proc. SPIE 1645, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy, (1 June 1992); doi: 10.1117/12.60942
Show Author Affiliations
Rudolf M. Verdaasdonck, Univ. Hospital Utrecht (Netherlands)
Christiaan F. P. van Swol, Univ. Hospital Utrecht (Netherlands)
Tom A. Boon, Univ. Hospital Utrecht (Netherlands)


Published in SPIE Proceedings Vol. 1645:
Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy
Thomas J. Dougherty, Editor(s)

© SPIE. Terms of Use
Back to Top