A polarimetric glucose sensor using a liquid-crystal polarization modulator driven by a sinusoidal signal

Yu Lung Lo, Tsung Chih Yu

研究成果: Article同行評審

73 引文 斯高帕斯(Scopus)

摘要

Rather than using a conventional Faraday modulator, this study adopts a liquid-crystal based rotator to modulate the azimuth of the linear polarized light in a sinusoidal signal for the measurement of glucose concentrations. The tilt angle of the LC director would vary as a sinusoidal-like function; however the modulating frequency in the sensing system is the double of the driving signal. A new signal demodulation algorithm, therefore, is developed that enables the polarization rotation angle corresponding to the glucose concentration to be derived. The standard deviation in rotation angle level of 0.00551° has been obtained, with a 0.998773 correlation coefficient between the reference and the measured values. The proposed measurement method has a minimum resolvable concentration of 0.2 g/dl. Compared to its conventional counterparts, the developed polarimeter potentially has a simpler structure, fewer optical elements, and a cheaper modulator component.

原文English
頁(從 - 到)40-48
頁數9
期刊Optics Communications
259
發行號1
DOIs
出版狀態Published - 2006 三月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 原子與分子物理與光學
  • 物理與理論化學
  • 電氣與電子工程

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