Direct measurement of the group refractive index of air with interferometry between adjacent femtosecond pulses

被引:48
作者
Yamaoka, Y [1 ]
Minoshima, K [1 ]
Matsumoto, H [1 ]
机构
[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058563, Japan
关键词
D O I
10.1364/AO.41.004318
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The group refractive index of air in laboratory conditions is measured directly between adjacent femto-second laser pulses by a new interferometry technique. Measurement of the repetition rate of the mode-locked pulse train that gives the maximum amplitude of the interference-signal envelope enables us to determine the group refractive index of air within a standard deviation of 2 X 10(-7). This simple method without vacuum reference is attractive for measuring the group refractive index needed for precise distance measurements in open fields. (C) 2002 Optical Society of America.
引用
收藏
页码:4318 / 4324
页数:7
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