用CO激光写入扭曲双模光纤中的手性长周期光纤光栅的特性。

Characteristics of chiral long-period fiber gratings written in the twisted two-mode fiber by CO laser.

作者信息

Cao Xibiao, Liu Yunqi, Zhang Liang, Zhao Yunhe, Wang Tingyun

出版信息

Appl Opt. 2017 Jun 20;56(18):5167-5171. doi: 10.1364/AO.56.005167.

DOI:10.1364/AO.56.005167

Abstract

We demonstrated the fabrication of a chiral long-period grating (CLPG) by twisting a two-mode fiber (TMF) when a CO laser beam was sweeping along the fiber axis. The torsion, temperature, and surrounding refractive index characteristics of the fabricated TMF-CLPG were investigated experimentally. The fabricated TMF-CLPG has a high torsion sensitivity [0.7768 nm/(rad/m)], and can measure the twist rate and twist direction simultaneously. This kind of CLPG would have great potential applications in high-sensitivity optical sensors.

摘要

我们展示了在CO激光束沿光纤轴扫描时，通过扭转双模光纤（TMF）来制造手性长周期光栅（CLPG）的方法。对制造出的TMF-CLPG的扭转、温度和周围折射率特性进行了实验研究。制造出的TMF-CLPG具有高扭转灵敏度[0.7768纳米/（弧度/米）]，并且能够同时测量扭转速率和扭转方向。这种CLPG在高灵敏度光学传感器方面将具有巨大的潜在应用。