抗温度干扰光纤声传感器

Translated title of the contribution: Fiber Acoustic Sensor Resisting Temperature Interference

Qiaomeng Rao, Qi Zhang*, Xiangjun Xin*, Ran Gao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

In this paper, a temperature insensitive fiber acoustic sensor with a π/2 quadrature phase plate is proposed. A wavefront phase plate with π/2 quadrature phase is fabricated by micromachining technology. Beam collimation through a self-focusing fiber can create wave interference through the π/2 quadrature phase plate, thus forming a miniature quadrature interference acoustic sensor. The experimental results show that when an acoustic frequency of 0.1-10 kHz for the proposed sensor, the acoustic response sensitivity reaches 168 mV•Pa-1 and the minimum detectable acoustic pressure can be 68 μPa•Hz-1/2 at a frequency of 5 kHz. Notably, the proposed sensor is almost insensitive to temperature fluctuation because of the fixed quadrature phase of the π/2 quadrature phase plate. The voltage standard variation of the proposed sensor is only 2.4% in a wide range from 20℃ to 140℃. The proposed sensor is very promising in several applications in remote gas leak exploration, photoacoustic spectroscopy detection, and sound location.

Translated title of the contributionFiber Acoustic Sensor Resisting Temperature Interference
Original languageChinese (Traditional)
Article number1306002
JournalGuangxue Xuebao/Acta Optica Sinica
Volume40
Issue number13
DOIs
Publication statusPublished - 10 Jul 2020

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