Absolute Measurement of the Refractive Index of Water by a Mode-Locked Laser at 518 nm

被引：14

作者：

Meng, Zhaopeng ^{[1
]}

Zhai, Xiaoyu ^{[1
,2
]}

Wei, Jianguo ^{[1
]}

Wang, Zhiyang ^{[3
]}

Wu, Hanzhong ^{[3
]}

机构：

[1] Tianjin Univ, Sch Comp Software, Tianjin 300072, Peoples R China

[2] Natl Ocean Technol Ctr, Tianjin 300112, Peoples R China

[3] Tianjin Univ, Sch Marine Sci & Technol, Tianjin 300072, Peoples R China

来源：

SENSORS | 2018年 / 18卷 / 04期

基金：

中国国家自然科学基金;

关键词：

refractive index of water; frequency comb; interferometry; metrology; DISTANCE MEASUREMENT; FREQUENCY COMBS; GLASS PANELS; TEMPERATURE; INTERFEROMETRY; WAVELENGTH; THICKNESS; AIR; SPECTROSCOPY; IMPROVEMENT;

D O I：

10.3390/s18041143

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, we demonstrate a method using a frequency comb, which can precisely measure the refractive index of water. We have developed a simple system, in which a Michelson interferometer is placed into a quartz-glass container with a low expansion coefficient, and for which compensation of the thermal expansion of the water container is not required. By scanning a mirror on a moving stage, a pair of cross-correlation patterns can be generated. We can obtain the length information via these cross-correlation patterns, with or without water in the container. The refractive index of water can be measured by the resulting lengths. Long-term experimental results show that our method can measure the refractive index of water with a high degree of accuracy-measurement uncertainty at 10(-5) level has been achieved, compared with the values calculated by the empirical formula.

引用

页数：11

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