文献类型：期刊文献

英文题名：High-fidelity optical fiber microphone based on graphene oxide and Au nanocoating

作者：Hou, Liangtao[1];Li, Yan[1];Sun, Libin[1];Liu, Chao[2];Zheng, Yichao[1];Liu, Yi[1];Qu, Shiliang[3]

机构：[1]Harbin Inst Technol, Dept Optoelect Sci, Weihai 264209, Peoples R China;[2]East China Univ Sci & Technol, Sino German Joint Res Ctr Adv Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China

年份：2023

卷号：12

期号：19

起止页码：3707

外文期刊名：NANOPHOTONICS

收录：;EI(收录号：20233914811440);WOS:【SCI-EXPANDED(收录号:WOS:001069919600001)】；

基金：This work was supported by the National Natural Science Foundation of China (12274103), Natural Science Foundation of Shandong Province (ZR2021MF111), and Natural Science Foundation of Guangxi Province of China (2021GXNSFAA075012).

语种：英文

外文关键词：optical fiber microphone; graphene oxide; Au nanocoating; high-fidelity; real-time communication

摘要：A high-fidelity optical fiber microphone (HF-OFM) with hybrid frequency and fast response is theoretically and experimentally demonstrated by the nanofabrication techniques for real-time communication, which consists of a graphene oxide (GO) film, an Au nanocoating, and an air cavity. The internal stress of the film is increased by the method of mechanical tensile preparation, and the microphone response flatness is improved. Meanwhile, the structural design of the 3 nm Au nanocoating improves the acoustic pressure detection sensitivity by 2.5 times by increasing the reflectivity. The experimental result shows that single, dual, and triple frequency acoustic signal detection in the frequency range of 0.1 kHz- 20 kHz are achieved with acoustic pressure sensitivities of 9.64, 9.66, and 8.9 V/Pa, as well as flat frequency response (<2 dB variation). The minimum detectable pressure (MDP) at 1 kHz is 63.25 mu Pa/Hz1/2. In addition, the high-fidelity real-time transmission of audio signals over an angle range of - 90. to 90. is verified by a self-made acoustic pressure detection device. Such a compact, high sensitivity, and largemeasurement range HF-OFM is very promising for applications of oil leakage exploration, acoustic source location, and real-time communication.