In Reflection Metal-Coated Diaphragm Microphone Using PCF Modal Interferometer
In Reflection Metal-Coated Diaphragm Microphone Using PCF Modal Interferometer
复制标题
DOI：
10.1109/jlt.2021.3051951
复制
发表时间：
2021-06-15
影响因子：
4.7
通讯作者：
Jha, Rajan
中科院分区：
文献类型：
--
作者：
Dass, Sumit;Chatterjee, Kalipada;Jha, Rajan
从无损检测到水下监视，声学传感器正在寻找各种现代应用。在这篇文章中，我们提出了一个双/混合干涉光学麦克风。我们将SMF-SCPCF段的模间干涉与非本征法布里-珀罗干涉仪相结合，构建了一种高灵敏度、紧凑型和鲁棒性的光学麦克风。传感器头由一个SMF-SCPCF拼接部分组成，该部分放置在铝涂层腈隔膜前面。在1400 Hz时，该传声器的声灵敏度为34.8 nm/kPa，噪声极限最小可检测声压（MDP）为0.26 P/root Hz。我们还记录了所提出的光学麦克风的角度响应，并且最终的方向性模式是“心形”类型，这使得它成为各种应用的优选选择。
Starting from non-destructive testing to underwater surveillance, acoustic sensors are finding a variety of modern-day applications. In this article, we propose a double/hybrid interferometry optical microphone. We have combined the intermodal interference of SMF-SCPCF section with extrinsic Fabry-Perot interferometer to construct a highly sensitive, compact and robust optical microphone. The sensor head consists of an SMF-SCPCF spliced section placed in front of an aluminium coated nitrile diaphragm. The acoustic sensitivity and noise-limited minimum detectable pressure (MDP) of the proposed microphone is 34.8 nm/kPa and 0.26 P/root Hz at 1400 Hz. We also recorded the angular response of the proposed optical microphone and the final directionality pattern is of 'cardioid' type which makes it a preferable option for a wide variety of applications.