Light monitoring by isotropic and by integrated fiber detectors

Ronald Sroka; Reinhold Baumgartner; Wolfgang Beyer; Christian Ell; G. Gebhardt; Armin Heinze; Dieter Jocham; Eberhard Unsoeld

doi:10.1117/12.17552

1 July 1990 Light monitoring by isotropic and by integrated fiber detectors

Ronald Sroka, Reinhold Baumgartner, Wolfgang Beyer, Christian Ell, G. Gebhardt, Armin Heinze, Dieter Jocham, Eberhard Unsoeld

Author Affiliations +

Proceedings Volume 1201, Optical Fibers in Medicine V; (1990) https://doi.org/10.1117/12.17552
Event: OE/LASE '90, 1990, Los Angeles, CA, United States

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.

Citation Download Citation

Ronald Sroka, Reinhold Baumgartner, Wolfgang Beyer, Christian Ell, G. Gebhardt, Armin Heinze, Dieter Jocham, and Eberhard Unsoeld "Light monitoring by isotropic and by integrated fiber detectors", Proc. SPIE 1201, Optical Fibers in Medicine V, (1 July 1990); https://doi.org/10.1117/12.17552

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