基于单频光纤激光的超声波传感器的特性分析

IF 2.1 4区物理与天体物理 Q2 OPTICS

Photonics Pub Date : 2024-07-11 DOI:10.3390/photonics11070654

Wei Zhu, Qiang Lu, Bo Yang, Rui Tian, Hao Luo, Chao Cai, Zhijun Yan, Luming Zhao

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引用次数: 0

摘要

本文展示了一种基于分布式反馈光纤激光器（DFB-FL）的超声检测系统，该系统具有高信噪比（SNR）、高灵敏度和宽频率响应范围。DFB-FL 是利用相位掩膜法在掺铒镱共掺光纤中紫外插入一个 π 相移光栅而制成的。对 DFB-FL 的理论和传感原理进行了讨论和分析。传感信号通过非平衡马赫-泽恩德干涉仪（MZI）系统进行解调。实验结果表明，传感器的灵敏度达到 75.18 mV/kPa，平坦频率响应范围超过 30 MHz，覆盖了电力系统异常放电的超声波检测频率范围。该 DFB-FL 的信噪比为 42.9 dB，相应的噪声等效压力计算值为 0.12 kPa。

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Characterization of Single Frequency Fiber-Laser-Based Ultrasound Sensor

In this paper, we demonstrated a distributed feedback fiber-laser- (DFB-FL) based ultrasound detection system with a high signal-to-noise ratio (SNR), high sensitivity and wide frequency response range. The DFB-FL was fabricated by UV-inscribing a π phase-shifted grating in the Erbium–Ytterbium co-doped fiber using the phase mask method. The theory of DFB-FL and the sensing principle has been discussed and analyzed. The sensing signal was demodulated via an unbalanced Mach–Zehnder interferometer (MZI) system. The experimental results showed that the sensitivity of the sensor reached 75.18 mV/kPa and the flat frequency response range covered over 30 MHz, which covered the ultrasonic detection frequency range of abnormal discharge in the electric power system. The SNR of this DFB-FL was 42.9 dB, and the corresponding noise-equivalent pressure was calculated as 0.12 kPa.

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来源期刊

Photonics Physics and Astronomy-Instrumentation

CiteScore

2.60

自引率

20.80%

发文量

817

审稿时长

8 weeks

期刊介绍： Photonics (ISSN 2304-6732) aims at a fast turn around time for peer-reviewing manuscripts and producing accepted articles. The online-only and open access nature of the journal will allow for a speedy and wide circulation of your research as well as review articles. We aim at establishing Photonics as a leading venue for publishing high impact fundamental research but also applications of optics and photonics. The journal particularly welcomes both theoretical (simulation) and experimental research. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation and experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material.