光学
带宽(计算)
悬臂梁
灵敏度(控制系统)
声学
灵活性(工程)
可扩展性
还原(数学)
干涉测量
计算机科学
材料科学
物理
电子工程
工程类
几何学
电信
数学
数据库
统计
复合材料
作者
Shen Tian,Pengbo Chen,Mingqi Jiao,Kaijun Mu,Yang Gao,Jifang Qiu,Lei Li,Chongxin Shan
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-03-25
卷期号:49 (8): 2101-2101
摘要
The introduction of cantilever-based fiber-optic microphones (FOMs) has proven to be effective in acoustic sensing. Further improvements in cantilevers face two key constraints: the challenge of achieving minimal sizes with sufficient reflective area and the trade-off between sensitivity and response bandwidth. Herein, we present a geometry optimization framework for a cantilever-based FOM that addresses this issue. Employing drumstick-shaped cantilevers housed within a Fabry–Perot (F–P) interferometric structure, we showcase a heightened sensitivity of 302.8 mV/Pa at 1 kHz and a minimum detectable acoustic pressure (MDP) of 2.35 µPa/Hz. Notably, these metrics outperform those of the original rectangular cantilever with identical dimensions. Furthermore, our proposed cantilever effectively mitigates the reduction in resonance frequencies, thereby improving the response bandwidth. This geometry optimization framework offers considerable design flexibility and scalability, making it especially suitable for high-performance acoustic sensing applications.
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