Sub-Ppb Level Hcn Photoacoustic Sensor Employing Dual-Tube Resonator Enhanced Clamp-Type Tuning Fork and U-Net Neural Network Noise Filter DOI
Lihao Wang,

Haohua Lv,

Yaohong Zhao

et al.

Published: Jan. 1, 2024

This study presents a new method for detecting hydrogen cyanide (HCN) using custom quartz tuning fork (QTF) combined with dual-tube acoustic micro-resonator (AmR) improved photoacoustic gas sensing. The AmR's design was optimized through theoretical simulations and experiments, resulting in robust on-beam Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) setup. An Erbium-Doped Fiber Amplifier (EDFA) integrated to enhance laser power by 286 times, while transformer-based U-shaped neural network served as machine learning filter refine signals reduce background noise. approach achieved low HCN detection limit of 0.89 parts per billion (ppb) rapid 1-second response time, marking significant advancement optical Validation tests confirmed the system's effectiveness real-time, high-sensitivity environmental monitoring industrial safety applications, showcasing notable improvements QEPAS technology suggesting further potential portable systems.

Language: Английский

Microfiber knot resonator augmented quartz-enhanced photoacoustic spectroscopy DOI
Jiabao Xie,

Haohua Lv,

J H Li

et al.

Infrared Physics & Technology, Journal Year: 2023, Volume and Issue: 136, P. 105037 - 105037

Published: Dec. 2, 2023

Language: Английский

Citations

6
Borophene-assisted selective enhancement of transmission through metallic nanoslits in telecommunication waveband DOI
Peng Luo, Wei Wei,

Guilian Lan

et al.

Optics Communications, Journal Year: 2023, Volume and Issue: 554, P. 130162 - 130162

Published: Nov. 23, 2023

Language: Английский

Citations

2
Highly sensitive detection of ammonia based on light-induced thermoelastic spectroscopy with hollow waveguide DOI

Chuanning Li,

Wei-Peng Chen, Shunda Qiao

et al.

Infrared Physics & Technology, Journal Year: 2024, Volume and Issue: 138, P. 105260 - 105260

Published: March 7, 2024

Language: Английский

Citations

0
基于光致热弹光谱的硫化氢痕量气体高灵敏探测（特邀） DOI Open Access

周美静 Zhou Meijing,

刘小利 Liu Xiaoli,

崔茹悦 Cui Ruyue

et al.

Laser & Optoelectronics Progress, Journal Year: 2024, Volume and Issue: 61(3), P. 0330002 - 0330002

Published: Jan. 1, 2024

光致热弹光谱(LITES)技术是近年来发展迅速的一种新颖痕量气体检测技术,该技术以体积小巧、成本低廉且无波长选择性的音叉式石英晶振替代成本高、探测波段窄的光电探测器作为光电换能器,通过探测激光与目标气体相互作用后光强的变化量实现目标气体浓度的反演。LITES技术具有探测灵敏度高、响应时间短、无波长选择性等优点。本文以下水道中的硫化氢气体为测量目标,开展了基于LITES技术的痕量气体探测系统的研究。以输出波长为1.582 μm的近红外连续波分布反馈单纵模二极管激光器作为激发光源,采用激光器波长调制和二次谐波探测技术,首先研究了激光波长调制深度对LITES系统产生的信号幅度的影响,而后详细研究了气体压强及环境压强对装置性能的影响。此外,为进一步提升装置探测灵敏度,有效光程长度为14.5 m的Herriott多通池被装配在激光器和作为光电探测器的音叉式石英晶振之间,从而使传感器在积分时间为300 ms时,获得4.87×10-7的最低探测极限,当积分时间延长至52 s时其探测灵敏度可达7.78×10-8。在完成装置各项参数优化之后开展了下水道中硫化氢气体的实测研究,结果显示,该系统完全可满足下水道臭气监测分析等领域的应用需求。

Citations

0
Sub-Ppb Level Hcn Photoacoustic Sensor Employing Dual-Tube Resonator Enhanced Clamp-Type Tuning Fork and U-Net Neural Network Noise Filter DOI
Lihao Wang,

Haohua Lv,

Yaohong Zhao

et al.

Published: Jan. 1, 2024

This study presents a new method for detecting hydrogen cyanide (HCN) using custom quartz tuning fork (QTF) combined with dual-tube acoustic micro-resonator (AmR) improved photoacoustic gas sensing. The AmR's design was optimized through theoretical simulations and experiments, resulting in robust on-beam Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) setup. An Erbium-Doped Fiber Amplifier (EDFA) integrated to enhance laser power by 286 times, while transformer-based U-shaped neural network served as machine learning filter refine signals reduce background noise. approach achieved low HCN detection limit of 0.89 parts per billion (ppb) rapid 1-second response time, marking significant advancement optical Validation tests confirmed the system's effectiveness real-time, high-sensitivity environmental monitoring industrial safety applications, showcasing notable improvements QEPAS technology suggesting further potential portable systems.

Language: Английский

Citations

0