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Proceedings Paper

Light monitoring by isotropic and by integrated fiber detectors
Author(s): Ronald Sroka; Reinhold Baumgartner; Wolfgang Beyer; Christian Ell; G. Gebhardt; Armin Heinze; Dieter Jocham; Eberhard Unsoeld
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Paper Abstract

In the medical field of laser light application detector systems are required for measuring the light power applied to the tissue and monitoring instabilities caused by the delivery system during the application of the laser light. An isotropic detector was developed consisting of a fiber tip molded to a sphere and covered with diffuse backscattering layers. The homogeneity of the isotropic detection is 85-90% in an angular field of Additionally a monitoring device has been developed which consists of a darkened chamber holding a part of the fiber bent to a curve. Integrated photodiodes detect the photons "stepping" out of the fiber. Defects of the fiber, the fiber tip, changes in the medium around the fiber tip, and variations of the laser output have influences on the detector signal. Both devices could be useful in evaluating an exact dosimetry for light.

Paper Details

Date Published: 1 July 1990
PDF: 7 pages
Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); doi: 10.1117/12.17552
Show Author Affiliations
Ronald Sroka, GSF-Zentrales Laserlaboratorium and Univ. Erlangen-Nuernberg (Germany)
Reinhold Baumgartner, GSF-Zentrales Laserlaboratorium and Urologische Klinik der Univ. (Germany)
Wolfgang Beyer, GSF-Zentrales Laserlaboratorium and Univ. Muenchen (Germany)
Christian Ell, Univ. Erlangen-Nuernberg (Germany)
G. Gebhardt, GSF-Zentrales Laserlaboratorium (Germany)
Armin Heinze, GSF-Zentrales Laserlaboratorium and Univ. Muenster (Germany)
Dieter Jocham, Univ. Muenchen (Germany)
Eberhard Unsoeld, GSF-Zentrales Laserlaboratorium (Germany)


Published in SPIE Proceedings Vol. 1201:
Optical Fibers in Medicine V
Abraham Katzir, Editor(s)

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