紧凑型光纤矢量倾斜仪。

Compact fiber-optic vector inclinometer.

机构信息

Department of Electronics, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6.

出版信息

Opt Lett. 2010 Apr 1;35(7):1034-6. doi: 10.1364/OL.35.001034.

DOI:10.1364/OL.35.001034

PMID:20364208

Abstract

What we believe to be a novel fiber-optical inclinometer based on a dual-path core-to-cladding mode coupling mechanism is demonstrated. Both the amplitude and tilt direction of bends about a 2-mm-long flexure joint in an optical fiber can be determined. The sensor head consists of a nonadiabatic abrupt taper cascaded with a weakly tilted fiber Bragg grating. Measured bend angles of up to 12 degrees are demonstrated, as well as a method to increase the sensitivity for bend angles smaller than 4 degrees.

摘要

我们展示了一种基于双路径纤芯-包层模式耦合机制的新型光纤测斜仪。该测斜仪可以确定光纤中 2mm 长的挠曲关节的弯曲幅度和倾斜方向。传感器探头由一个非绝热的陡变锥形结构和一个弱倾斜光纤布拉格光栅级联而成。实验结果表明，该测斜仪可以测量 12 度以内的弯曲角度，并且提出了一种方法来提高对小于 4 度的弯曲角度的灵敏度。