Optical polarimetry for noninvasive glucose sensing enabled by Sagnac interferometry

Amy M. Winkler, Garret T. Bonnema, Jennifer K. Barton

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


Optical polarimetry is used in pharmaceutical drug testing and quality control for saccharide-containing products (juice, honey). More recently, it has been proposed as a method for noninvasive glucose sensing for diabetic patients. Sagnac interferometry is commonly used in optical gyroscopes, measuring minute Doppler shifts resulting from mechanical rotation. In this work, we demonstrate that Sagnac interferometers are also sensitive to optical rotation, or the rotation of linearly polarized light, and are therefore useful in optical polarimetry. Results from simulation and experiment show that Sagnac interferometers are advantageous in optical polarimetry as they are insensitive to net linear birefringence and alignment of polarization components.

Original languageEnglish (US)
Pages (from-to)2719-2731
Number of pages13
JournalApplied optics
Issue number17
StatePublished - Jun 10 2011

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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