The Test System of DFB Fiber Laser Hydrophone Acoustic Pressure Sensitivity

2018 ◽  
Author(s):  
Jia Liu ◽  
Yuanyuan Yang ◽  
Zhihui Sun ◽  
Xiaolei Zhang
Keyword(s):  
Fiber Laser ◽  
Acoustic Pressure ◽  
Test System ◽  
Pressure Sensitivity

Acoustic Pressure Sensitivity of Yb3+/Er3+Co-Doped Distributed Bragg Reflection Fiber Laser Hydrophone

2009 ◽  
Vol 36 (6) ◽  
pp. 1473-1478 ◽  
Author(s):  
马丽娜 Ma Lina ◽  
胡永明 Hu Yongming ◽  
罗洪 Luo Hong ◽  
张学亮 Zhang Xueliang ◽  
孟洲 Meng Zhou
Keyword(s):  
Fiber Laser ◽  
Acoustic Pressure ◽  
Bragg Reflection ◽  
Pressure Sensitivity ◽  
Distributed Bragg Reflection ◽  
Co Doped

Performance of aluminum nitride-based piezoelectric micromachined ultrasonic transducers under different readout configurations

2021 ◽  
Author(s):  
Lei Shi ◽  
Licheng Jia ◽  
Chongbin Liu ◽  
Hongbin Yu ◽  
Chengliang Sun ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Aluminum Nitride ◽  
Output Voltage ◽  
Acoustic Pressure ◽  
Low Noise ◽  
Ultrasonic Transducers ◽  
Pressure Sensitivity ◽  
Signal To Noise ◽  
Measurement Results ◽  
Noise Amplification

Abstract In this paper, a low noise amplification circuit is designed for aluminum nitride (AlN)-based piezoelectric micromachined ultrasonic transducers (PMUTs) with three diffenent sensing configurations. The acoustic pressure sensitivity and noise resolution of PMUTs corresponding to different readout configurations are analyzed and characterized. With the differential readout configuration, the acoustic pressure sensitivity of the PMUTs is improved by 5.76 dB (re: 1 V/μPa) on average, and the noise resolution is reduced by about 8 dB at 500 Hz (re: 1 μPa/√Hz). Compared to the conventional readout configuration, both theoretical analysis and measurement results show that the output voltage of PMUTs is doubled with the differential readout configuration and thus the acoustic pressure sensitivity is improved. Moreover, the noise resolution of PMUTs is reduced and thus the signal-to-noise (SNR) is improved. This work offers new insight on improving the receiving performance of PMUTs.

scholarly journals Microplasma microphones

Acta Acustica ◽  
2021 ◽  
Vol 5 ◽  
pp. 37
Author(s):  
Philippe Béquin ◽  
Adalbert Nanda Tonlio ◽  
Stéphane Durand
Keyword(s):  
Experimental Data ◽  
Empirical Model ◽  
Sound Pressure ◽  
Acoustic Pressure ◽  
Electrode Array ◽  
Calibration Method ◽  
Pressure Sensitivity ◽  
Empirical Expression ◽  
Microstructured Electrode ◽  
Good Agreement

It is shown experimentally that a microplasma created by a microstructured electrode array is sensitive to sound pressure. In this paper, two electrode architectures are used to create the microplasma. The sensitivity of these microplasma microphones, close to 0.4 nA/Pa, is estimated using a waveguide and a calibration method by comparison with a reference microphone. An empirical expression of the acoustic pressure sensitivity of microdischarges is proposed. The predictions of this empirical model are in good agreement with the experimental data.

scholarly journals Development of high sensitivity eight-element multiplexed fiber laser acoustic pressure hydrophone array and interrogation system

2017 ◽  
Vol 7 (3) ◽  
pp. 253-260 ◽  
Author(s):  
Ming Li ◽  
Zhihui Sun ◽  
Xiaolei Zhang ◽  
Shujuan Li ◽  
Zhiqiang Song ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Acoustic Pressure ◽  
High Sensitivity ◽  
Hydrophone Array

Passively mode-locked fiber laser sensor for acoustic pressure sensing

2013 ◽  
Vol 60 (21) ◽  
pp. 1892-1897 ◽  
Author(s):  
Shun Wang ◽  
Ping Lu ◽  
Hao Liao ◽  
Liang Zhang ◽  
Deming Liu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Acoustic Pressure ◽  
Laser Sensor ◽  
Pressure Sensing
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