干涉测量
光学
游标尺
折射率
线性
马赫-曾德尔干涉仪
物理
叠加原理
放大倍数
灵敏度(控制系统)
信号(编程语言)
计算机科学
电子工程
量子力学
工程类
程序设计语言
作者
Xiaohui Fang,Wu Zhang,Jiewen Li,Chunli Lin,Zhennan Chen,Meng Zhang,Shihua Huang,Dunke Lu,Minggui Wan,Xiaozhong Qiu
出处
期刊:Optics Express
[The Optical Society]
日期:2021-03-30
卷期号:29 (8): 11570-11570
被引量:23
摘要
The Vernier effect magnifies optical sensitivity by the superposition of two spectra with slightly shifted frequencies from a sensing interferometer (SIM) and a reference interferometer (RIM). In this study, we demonstrate that the Vernier effect can be obtained through a single interferometer, which detects the changed signal and provides an artificial reference spectrum (ARS) to be superposed with the changed signal spectrum. The ARS extracted by spatial frequency down-conversion of one sensing spectrum in the signal processing is not affected by environmental changes and can be detuned at an arbitrarily small amount with the measured signal spectrum. This approach is simpler and accurate and provides ultrahigh sensitivity. To validate the principle, a Mach–Zehnder (MZ) interferometer based on a dual-mode microfiber was designed for sensing the refractive index (RI) change magnification, and a high sensitivity of 71354.58 nm/refractive index unit (RIU) was obtained with good linearity.
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