Acoustic waves in tilted fiber Bragg gratings for sensing applications
Acoustic waves in tilted fiber Bragg gratings for sensing applications
复制标题
用于传感应用的倾斜光纤布拉格光栅中的声波
DOI：
10.1117/12.2264230
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
P. André
中科院分区：
文献类型：
--
作者：
C. Marques;N. Alberto;F. Domingues;C. Leitão;P. Antunes;J. Pinto;P. André
倾斜光纤布拉格光栅（TFBG）由于其固有的特性而成为最具吸引力的光纤传感技术之一。另一方面，声光效应是一种重要的、快速的和精确的机制，可以用来改变和控制石英和聚合物光纤中光纤光栅的一些特性。利用这种效应已经成功地设计和制造了几种用于光通信和传感的全光器件。在这项工作中，我们提出了最近的结果，关于生产的光学传感器，通过声光效应在TFBG。利用声波源的功率电平可以控制薄膜晶体管的包层模和纤芯模的振幅。此外，TFBG的包层模式可以通过发射声波耦合回到芯模式。由于要满足相位匹配，在原始布拉格波长的左侧产生感应带。详细分析了当声波被打开时，使用蔗糖溶液的折射率（RI）从1.33到1.43。
Tilted fiber Bragg gratings (TFBGs) are one of the most attractive kind of optical fiber sensor technology due to their intrinsic properties. On the other hand, the acousto-optic effect is an important, fast and accurate mechanism that can be used to change and control several properties of fiber gratings in silica and polymer optical fiber. Several all-optical devices for optical communications and sensing have been successfully designed and constructed using this effect. In this work, we present the recent results regarding the production of optical sensors, through the acousto-optic effect in TFBGs. The cladding and core modes amplitude of a TFBG can be controlled by means of the power levels from acoustic wave source. Also, the cladding modes of a TFBG can be coupled back to the core mode by launching acoustic waves. Induced bands are created on the left side of the original Bragg wavelength due to phase matching to be satisfied. The refractive index (RI) is analyzed in detail when acoustic waves are turned on using saccharose solutions with different RI from 1.33 to 1.43.