Rao, Y.J. and Webb, D.J. and Jackson, D.A. and Zhang, L.S. and Bennion, I. (1997) In-fiber Bragg-Grating temperature sensor system for medical applications. Journal of Lightwave Technology, 15 (5). pp. 779-785. ISSN 0733-8724.
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A novel quasidistributed in-fiber Bragg grating (FBG) temperature sensor system has been developed for temperature profiling in vivo in the human body for medical applications, e.g., hyperthermia treatment. This paper provides the operating principle of FBG temperature sensors and then the design of the sensor head, High-resolution detection of the wavelength-shifts induced by temperature changes are achieved using drift-compensated interferometric detection while the return signals from the FBG sensor array are demultiplexed with a simple monochromator which offers crosstalk-free wavelength-division-multiplexing (WDM). A ''strain-free'' probe is designed by enclosing the FBG sensor array in a protection sleeve. A four FBG sensor system is demonstrated and the experimental results are in good agreement with those obtained by traditional electrical thermocouple sensors, A resolution of 0.1 degrees C and an accuracy of +/- 0.2 degrees C over a temperature range of 30-60 degrees C have been achieved, which meet established medical requirements.
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences|
|Depositing User:||T.J. Sango|
|Date Deposited:||21 May 2009 12:36|
|Last Modified:||21 May 2009 12:36|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/17901 (The current URI for this page, for reference purposes)|
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