Spherical diffusing probes for high-peak-power copper vapor/dye laser systems

Rudolf M. Verdaasdonk*, Christiaan F. Swol, Tom A. Boon

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
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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 μm 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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Pages200-204
Number of pages5
ISBN (Print)0819407917
DOIs
Publication statusPublished - 1 Dec 1992
Externally publishedYes
EventOptical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy 1992 - Los Angeles, United States
Duration: 20 Jan 199221 Jan 1992

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1645
ISSN (Print)0277-786X

Conference

ConferenceOptical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy 1992
CountryUnited States
CityLos Angeles
Period20/01/9221/01/92

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