Abrupt Taper Michelson Interferometer Using Heterodyne for Measuring Refractive Index

被引：8
|
作者：
Liang, Yu-Chan [1 ]
Liao, Chia-Chi [1 ]
Lo, Yu-Lung [2 ]
机构：
[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 70101, Taiwan
[2] Natl Cheng Kung Univ, Dept Mech Engn, Adv Optoelect Technol Ctr, Tainan 70101, Taiwan
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2014年 / 26卷 / 23期
关键词：
Refractive index; abrupt taper Michelson interferometer; path-matching differential interferometer; heterodyne modulation; SINGLE-MODE FIBER;
D O I：
10.1109/LPT.2014.2355262
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：
A method is proposed for measuring the refractive index (RI) of aqueous solutions using an abrupt taper Michelson interferometer and a synthetic heterodyne detection scheme. In the proposed approach, the abrupt taper Michelson interferometer is implemented with a Fabry-Perot cavity in a path-matching differential interferometer. The RI of the aqueous solution is then extracted from the phase shift of the heterodyne demodulated interferometric signal. The experimental results show that a change in the RI of 0.0001 prompts a phase shift of similar to 1.35 degrees in the demodulated signal given the use of an abrupt taper Michelson interferometer with a sensing length of 20 cm.
引用
收藏
页码：2330 / 2333
页数：4
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