Development of a non-contact precision measurement technique using optical frequency combs

被引：1
|
作者：
Onoe, Taro [1 ]
Takahashi, Satoru [1 ]
Takamasu, Kiyoshi [1 ]
Matsumoto, Hirokazu [1 ]
机构：
[1] Univ Tokyo, Dept Precis Engn, Tokyo 1138654, Japan
来源：
EMERGING TECHNOLOGY IN PRECISION ENGINEERING XIV | 2012年 / 523-524卷
关键词：
distance measurement; optical frequency comb; non-contact measurement; DISTANCE;
D O I：
10.4028/www.scientific.net/KEM.523-524.877
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We develop a new method for high-resolution, contactless distance measurement based on self-frequency beats of optical frequency combs. We use two optical frequency comb lasers with Rb-stabilized repetition frequencies for accurate distance measurement. The repetition frequencies of the optical frequency combs differ, allowing down-conversion of gigahertz to several megahertz self-beats without an RF frequency oscillator. A high-resolution, high-sensitivity lock-in amplifier measures the phases of the megahertz frequency signals. The method is applied to distance measurement for objects with rough surfaces separated by several meters.
引用
收藏
页码：877 / 882
页数：6
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