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Applied Optics

Applied Optics


  • Vol. 42, Iss. 28 — Oct. 1, 2003
  • pp: 5774–5776

Interferometric optical sensor for measuring glucose concentration

Kun-Huang Chen, Cheng-Chih Hsu, and Der-Chin Su  »View Author Affiliations

Applied Optics, Vol. 42, Issue 28, pp. 5774-5776 (2003)

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With a specially designed probe, the phase difference between s and p polarization of light reflected under surface-plasmon resonance is measured by use of a common-path heterodyne interferometer. For specific ratios of phase difference to glucose concentration, the glucose concentration can be estimated as a function of the measured phase data. A prototype was set up to demonstrate the feasibility of this sensor, which was experimentally tested in the range 40–500 mg/dl with a small quantity of solution and had a measurement resolution of 1.41 mg/dl at 25 °C.

© 2003 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(240.6680) Optics at surfaces : Surface plasmons

Original Manuscript: February 26, 2003
Revised Manuscript: July 1, 2003
Published: October 1, 2003

Kun-Huang Chen, Cheng-Chih Hsu, and Der-Chin Su, "Interferometric optical sensor for measuring glucose concentration," Appl. Opt. 42, 5774-5776 (2003)

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