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

Rudolf M. Verdaasdonck; Christiaan F. P. van Swol; Tom A. Boon

doi:10.1117/12.60942

1 June 1992 Spherical diffusing probes for high-peak-power copper vapor/dye laser systems

Rudolf M. Verdaasdonck, Christiaan F. P. van Swol, Tom A. Boon

Proceedings Volume 1645, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy; (1992) https://doi.org/10.1117/12.60942
Event: OE/LASE '92, 1992, Los Angeles, CA, United States

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.

Citation Download Citation

Rudolf M. Verdaasdonck, Christiaan F. P. van Swol, and Tom A. Boon "Spherical diffusing probes for high-peak-power copper vapor/dye laser systems", Proc. SPIE 1645, Optical Methods for Tumor Treatment and Detection: Mechanisms and Techniques in Photodynamic Therapy, (1 June 1992); https://doi.org/10.1117/12.60942

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available