A true phase sensitive optical heterodyne polarimeter on glucose concentration measurement

This paper proposes a novel method, which uses an optical polarized heterodyne polarimeter and lock-in technique to detect the concentration of a glucose solution obtained from the detection of a phase sensitive heterodyning signal. In this experiment, the phase measurement relates only with the optical activity of the concentration of a glucose solution; it is irrelevant to the index refraction of the test sample in the interferometer. The polarized common path feature with respect to the left-hand and right-hand side circular polarized lights is constructed in this experiment. The system stability and the advantage of the insensitivity to the environmental disturbance are also discussed.