Optical Vernier Effect: Recent Advances and Developments,Laser & Photonics Reviews

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Optical Vernier Effect: Recent Advances and Developments
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-05-28 , DOI: 10.1002/lpor.202000588
André D. Gomes _{1,

2} , Hartmut Bartelt ₁ , Orlando Frazão ₂

Affiliation

The optical analog of the Vernier effect applied to fiber interferometers is a recent tool to enhance the sensitivity and resolution of optical fiber sensors. This effect relies on the overlap between the signals of two interferometers with slightly detuned interference frequencies. The Vernier envelope modulation generated at the output spectrum presents magnified sensing capabilities (i.e., magnified wavelength shift) compared to that of the individual sensing interferometers that constitute the system, leading to a new generation of highly sensitive fiber sensing devices. This review analyses the recent advances and developments of the optical Vernier effect from a fiber sensing point-of-view. Initially, the fundamentals of the effect are introduced, followed by an extensive review on the state-of-the-art, presenting all the different configurations and types of fiber sensing interferometers used to introduce the optical Vernier effect. This paper also includes an overview of the complex case of enhanced Vernier effect and the introduction of harmonics to the effect.

中文翻译：

光学游标效应：最新进展和发展

应用于光纤干涉仪的游标效应的光学模拟是最近提高光纤传感器灵敏度和分辨率的工具。这种效应依赖于两个干涉仪信号之间的重叠，干扰频率略有失谐。与构成系统的单个传感干涉仪相比，在输出光谱处产生的游标包络调制呈现出放大的传感能力（即放大的波长偏移），从而产生了新一代高灵敏度光纤传感设备。本综述从光纤传感的角度分析了光学游标效应的最新进展和发展。首先介绍了效果的基本原理，然后对最先进的技术进行了广泛的审查，介绍用于引入光学游标效应的所有不同配置和类型的光纤传感干涉仪。本文还概述了增强型游标效应的复杂情况以及向该效应引入谐波。

更新日期：2021-07-08

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