光学
材料科学
法布里-珀罗干涉仪
折射率
渐变折射率纤维
归一化频率(单位)
光纤传感器
光纤
激光器
阶跃索引配置文件
光纤激光器
表面微加工
光电子学
物理
相位噪声
制作
病理
频率合成器
医学
替代医学
锁相环
作者
Zengling Ran,Yunjiang Rao,W J Liu,Xian Liao,Kin Seng Chiang
出处
期刊:Optics Express
[The Optical Society]
日期:2008-01-01
卷期号:16 (3): 2252-2252
被引量:314
摘要
We propose and demonstrate a Fabry-Perot (F-P) optical fiber tip sensor for high-resolution refractive-index measurement fabricated by using 157-nm laser micromachining, for the first time to our knowledge. The sensor head consists of a short air F-P cavity near the tip of a single-mode fiber and the fiber tip. The external refractive index is determined according to the maximum fringe contrast of the interference fringes in the reflective spectrum of the sensor. Such a sensor can provide temperature-independent measurement of practically any refractive index larger than that of air and offers a refractive-index resolution of ~4 x 10(-5) in its linear operating range. The experimental data agree well with the theoretical results.
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