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首页> 外文期刊>Optical engineering >Characteristics of a fiber-optical Fabry-Perot interferometric acoustic sensor based on an improved phase-generated carrier-demodulation mechanism
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Characteristics of a fiber-optical Fabry-Perot interferometric acoustic sensor based on an improved phase-generated carrier-demodulation mechanism

机译：基于改进的相位生成载波解调机制的光纤法布里-珀罗干涉声传感器的特性

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摘要

The characteristics of a fiber-optic Fabry-Perot interferometric acoustic sensor are investigated. An improved phase-generator carrier-demodulation mechanism is proposed for obtaining a high harmonic suppression ratio and stability of the demodulation results. A gold-coated polyethylene terephthalate membrane is used as the sensing diaphragm. By optimizing the parameters and the demodulation algorithm, the signal-to-noise ratio (SNR) and distortion ratio of 50.3 dB and the total harmonic distortion of 0.1% at 114 dB sound pressure level (SPL) (@ 1 kHz) are achieved, respectively. The sensor shows good temperature stability; the variation of the response is within 0.6 dB as the temperature changes from -10°C to 50°C. A sensitivity of 40 mV/Pa at 1 kHz and a frequency response range of 100 Hz to 12.5 kHz are reached, respectively. The SNR of the system is 60 dB (Re. 94 dB SPL). The sensor may be applied to photoacoustic spectrometers as a high-performance acoustic sensor.
机译：研究了光纤法布里-珀罗干涉式声传感器的特性。为了获得较高的谐波抑制比和解调结果的稳定性，提出了一种改进的相位发生器载波解调机制。镀金的聚对苯二甲酸乙二醇酯膜用作传感膜片。通过优化参数和解调算法，在114 dB声压级（SPL）（@ 1 kHz）时，信噪比（SNR）和失真比为50.3 dB，总谐波失真为0.1％，分别。传感器显示出良好的温度稳定性；当温度从-10°C变为50°C时，响应变化在0.6 dB以内。 1 kHz时的灵敏度为40 mV / Pa，频率响应范围为100 Hz至12.5 kHz。系统的SNR为60 dB（Re。94 dB SPL）。该传感器可以作为高性能的声传感器应用于光声光谱仪。

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  • 来源
    《Optical engineering》 |2015年第4期|046107.1-046107.6|共6页
  • 作者

    Xuefeng Mao; Xiaoran Tian; Xinlei Zhou; Qingxu Yu;

  • 作者单位

    Dalian University of Technology, School of Physics and Optoelectronic Engineering, No. 2 Linggong Road, Dalian 116024, China;

    Columbia University, Fu Foundation School of Engineering, 521 West 122nd Street, Apt. 42, New York, New York 10027, United States;

    Dalian University of Technology, School of Physics and Optoelectronic Engineering, No. 2 Linggong Road, Dalian 116024, China;

    Dalian University of Technology, School of Physics and Optoelectronic Engineering, No. 2 Linggong Road, Dalian 116024, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fiber optic acoustic sensor; Fabry-Perot; polyethylene terephthalate diaphragm; phase generator carrier;

    机译：光纤声传感器;法布里-珀罗;聚对苯二甲酸乙二酯隔膜相位发生器载体;

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