摘要
为了提高旋光特性检测的灵敏度,设计搭建了一套基于塞曼效应的共光路外差干涉仪应用于旋光液体的旋光特性检测。采用塞曼效应激光器作为光源能发出两束正交线偏光,简化了实验装置的复杂性;且在系统中利用平衡检测与差动放大器,可降低激光器本身与外部环境所造成的大部分噪声,从而提高检测灵敏度。结果表明,对(0～50)mg/dL的低浓度葡萄糖水溶液的旋光特性测量,其检测灵敏度可达2.3×10-5(°)。这种结构简单的干涉仪可应用于固态、液体或气态旋光物质的旋光特性分析中。
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 beterodyne interferometer can be applied in the optical activity analysis of solid-state, liquid-state or gas-liquid material.
出处
《激光技术》
CAS
CSCD
北大核心
2012年第1期5-7,12,共4页
Laser Technology
基金
陕西省自然科学基础研究计划基金资助项目(2010JM5011)
陕西省教育厅专项科研计划资助项目(11JK0553)
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
laser technique
heterodyne interferometer
optical activity
Zeeman effect
common-path
differential amplifier
作者简介
娄本浊（1982-），男，硕士，讲师，主要从事光电检测技术开发与应用的研究。E—mail：lunwen_8686@163．com
