激光技术2012，Vol.36Issue(1)：5-7,12,4.DOI:10.3969/j.issn.1001-3806.2012.01.002
一种测量液体旋光特性的共光路外差干涉技术
A common-path heterodyne interferometer technique for measurement of optical activity of liquid
摘要
Abstract
In order to improve the detection sensitivity of optical activity, based on Zeeman effect, a common-path heterodyne interferometer was developed to measure the optical activity of liquid. In this heterodyne interferometer, a pair of correlated orthogonal linear polarized beam is emitted from a Zeeman He-Ne laser, which reduces the complexity of the optical system greatly. A balanced detector and a differential amplifier are integrated into this interferometer so as to reduce the excess noise induced by laser intensity fluctuation and external environments significantly. Thus, a shot-noise-limited detection of this interferometer can be achieved. The optical activity of glucose solution with concentration of (0 ~ 50) mg/dL was measured with this common-path heterodyne interferometer and the detection sensitivity was up to 2. 3 × 10-5 degree. This simple heterodyne interferometer can be applied in the optical activity analysis of solid-state, liquid-state or gas-liquid material.关键词
激光技术/外差干涉技术/旋光特性/塞曼效应/共光路/差动放大器Key words
laser technique/ heterodyne interferometer/ optical activity/Zeeman effect/ common-path/ differential amplifier分类
数理科学引用本文复制引用
娄本浊..一种测量液体旋光特性的共光路外差干涉技术[J].激光技术,2012,36(1):5-7,12,4.基金项目
陕西省自然科学基础研究计划基金资助项目(2010JM5011) （2010JM5011）
陕西省教育厅专项科研计划资助项目(11JK0553) （11JK0553）
