Fiberoptic Temperature Sensing For Biomedical Applications

D. A. Christensen

doi:10.1117/12.945263

21 June 1988 Fiberoptic Temperature Sensing For Biomedical Applications

D. A. Christensen

Proceedings Volume 0906, Optical Fibers in Medicine III; (1988) https://doi.org/10.1117/12.945263
Event: 1988 Los Angeles Symposium: O-E/LASE '88, 1988, Los Angeles, CA, United States

Abstract

Fiberoptic temperature sensors have found valuable application in several areas of research and treatment in biology and medicine. These include tissue monitoring during electromagnetic heating for cancer therapy, catheter-tip sensors as part of multi-purpose fiberoptic probes, patient monitoring during magnetic resonance imaging (MRI), and microwave biohazards studies. The advantage of fiberoptic probes compared to more conventional temperature sensors such as thermistors or thermocouples lies in the nonconductive property of the glass or plastic fibers used. This avoids shock hazard to the patient, and perturbation of the readings in electromagnetic environments. Fiberoptic temperature sensors may be classified into one of three general categories: 1) intensity, 2) wavelength, and 3) time-domain. Types of optical sensors which have been successfully employed with fibers include fluorescent materials, semiconductors, birefringent crystals, and Fabry-Perot interferometers. An example of a wavelength-based sensor is described herein; it is a new technique based upon wavelength shifts in a GaAs sensor using broadband illumination and a fast-scanning spectrometer, and appears useful over the biological temperature range of 25-50°C.

Citation Download Citation

D. A. Christensen "Fiberoptic Temperature Sensing For Biomedical Applications", Proc. SPIE 0906, Optical Fibers in Medicine III, (21 June 1988); https://doi.org/10.1117/12.945263

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