Remote measurement of refractive index of air using tandem interferometer over long optical fiber

被引：4
|
作者：
Matsumoto, Hirokazu [1 ]
Sasaki, Kaoru [1 ]
Hirai, Akiko [1 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Natl Metrol Inst Japan, Tsukuba, Ibaraki 3058563, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2008年 / 47卷 / 09期
关键词：
refractive index; optical fiber; low-coherence interferometer; remote measurement; tandem interferometer; optical length;
D O I：
10.1143/JJAP.47.7386
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The refractive index of air is accurately measured using a vacuum cell and a tandem low-coherence interferometer with a communication optical fiber of 30 km length with standard uncertainties of 0.20 ppm for the phase refractive index and 0.29 ppm for the group refractive index. Experimental results are compared with the value calculated from the equation for the refractive index of air using data obtained from measurements of the surrounding air, with a standard uncertainty of 0.22 ppm, and the difference between the average values is within 0.1 ppm. This method is applicable to the in situ high-precison measurement of optical length.
引用
收藏
页码：7386 / 7389
页数：4
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