Absolute strain demodulation with acoustooptic scanning low-coherence fiber interferometry

被引：2
|
作者：
Sinha, PG
Yoshino, T
机构：
[1] Department of Electronic Engineering, Faculty of Engineering, Gunma University, Kiryu 376, Gunma
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 1997年 / 9卷 / 08期
关键词：
acoustooptic devices; interferometry; optical fiber measurement applications;
D O I：
10.1109/68.605528
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 traveling acoustic pulse in a two-mode fiber can act as a moving beam splitter coupling light from LP01 to LP11 mode. The intermodal delay varies as the acoustic pulse advances in the fiber, The device can be used in low-coherence interferometry to scan time delay for making a fast extended range absolute measurement without involving complex signal processing, As an illustration, the time delay as a function of axial strain applied to a section of highly birefringent fiber is scanned. Absolute measurement of strain over 900 mu epsilon with a resolution of the order of 25 mu epsilon is reported.
引用
收藏
页码：1137 / 1139
页数：3
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