A novel diode laser system for photodynamic therapy

E. Samsøe, P.M. Petersen, Peter E. Andersen, S. Andersson-Engels, K. Svanberg

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

    Abstract

    In this paper a novel diode laser system for photodynamic therapy is demonstrated. The system is based on linear spatial filtering and optical phase conjugate feedback from a photorefractive BaTiO3 crystal. The spatial coherence properties of the diode laser are significantly improved. The system provides an almost diffraction limited output which is efficiently coupled into a 50 mum core diameter fiber. The optical power transmitted through the fiber is increased by a factor of six when the feedback is applied to the diode laser. 85 percent of the power from the freely running laser diode is extracted in a high-quality beam and 80 percent of the output power is extracted through the fiber. The power transmitted through tile fiber scales linearly with the power of the laser diode. which means that a laser diode emitting 1.7 W multi-mode radiation would provide 1 W of optical power through a 50 mum core diameter fiber. The system is compact, portable, stable, and easy to operate.
    Original languageEnglish
    Title of host publicationLaser-tissue interactions, therapeutic applications, and photodynamic therapy
    EditorsR. Birngruber, H. van den Bergh
    Volume4433
    Place of PublicationBellingham, WA
    PublisherInternational Society for Optical Engineering
    Publication date2001
    Pages134-139
    ISBN (Print)0-8194-4147-3
    DOIs
    Publication statusPublished - 2001
    EventInternational Symposium on Laser-Tissue Interactions, Therapeutic Applications, and Photodynamic Therapy - Munich, Germany
    Duration: 17 Jun 200121 Jun 2001

    Conference

    ConferenceInternational Symposium on Laser-Tissue Interactions, Therapeutic Applications, and Photodynamic Therapy
    CountryGermany
    CityMunich
    Period17/06/200121/06/2001
    SeriesProceedings of SPIE
    Number33
    Volume2
    ISSN0277-786X

    Keywords

    • photodynamic therapy
    • diode lasers
    • medical optics instruments

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