All-optical non-resonant photoacoustic spectroscopy for multicomponent gas detection based on aseismic photoacoustic cell

IF 7.1 1区医学 Q1 ENGINEERING, BIOMEDICAL Photoacoustics Pub Date : 2023-11-09 DOI:10.1016/j.pacs.2023.100571

Lujun Fu , Ping Lu , Yufeng Pan , Yi Zhong , Chaotan Sima , Qiang Wu , Jiangshan Zhang , Lingzhi Cui , Deming Liu

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Abstract

An all-optical non-resonant photoacoustic spectroscopy system for multicomponent gas detection based on a silicon cantilever optical microphone (SCOM) and an aseismic photoacoustic cell is proposed and demonstrated. The SCOM has a high sensitivity of over 96.25 rad/Pa with sensitivity fluctuation less than ± 1.56 dB between 5 Hz and 250 Hz. Besides, the minimal detectable pressure (MDP) of the sensor is 0.55 μPa·Hz^−1/2 at 200 Hz, which indicates that the fabricated sensor has high sensitivity and low noise level. Six different gases of CO₂, CO, CH₄, C₂H₆, C₂H₄, C₂H₂ are detected at the frequency of 10 Hz, whose detection limits (3σ) are 62.66 ppb, 929.11 ppb, 1494.97 ppb, 212.94 ppb, 1153.36 ppb and 417.61 ppb, respectively. The system achieves high sensitivity and low detection limits for trace gas detection. In addition, the system exhibits seismic performance with suppressing vibration noise by 4.5 times, and achieves long-term stable operation. The proposed non-resonant all-optical PAS multi-component gas detection system exhibits the advantages of anti-vibration performance, low gas consumption and long term stability, which provides a solution for working in complex environments with inherently safe.

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基于地震光声电池的多组分气体全光非共振光声光谱检测

提出并演示了一种基于硅悬臂光传声器(SCOM)和地震光声电池的多组分气体全光非谐振光声光谱检测系统。在5hz ~ 250hz范围内，SCOM具有96.25 rad/Pa以上的灵敏度，灵敏度波动小于±1.56 dB。此外，该传感器在200 Hz时的最小检测压力(MDP)为0.55 μPa·Hz−1/2，具有高灵敏度和低噪声的特点。在10 Hz频率下可检测到CO2、CO、CH4、C2H6、C2H4、C2H2 6种不同气体，其检出限(3σ)分别为62.66 ppb、929.11 ppb、1494.97 ppb、212.94 ppb、1153.36 ppb和417.61 ppb。该系统对微量气体的检测灵敏度高，检出限低。此外，该系统具有良好的抗震性能，可将振动噪声抑制4.5倍，并可长期稳定运行。所提出的非谐振全光PAS多组分气体检测系统具有抗振动性能好、耗气量低、长期稳定等优点，为复杂环境下的固有安全工作提供了解决方案。

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来源期刊

Photoacoustics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

11.40

自引率

16.50%

发文量

审稿时长

53 days

期刊介绍： The open access Photoacoustics journal (PACS) aims to publish original research and review contributions in the field of photoacoustics-optoacoustics-thermoacoustics. This field utilizes acoustical and ultrasonic phenomena excited by electromagnetic radiation for the detection, visualization, and characterization of various materials and biological tissues, including living organisms. Recent advancements in laser technologies, ultrasound detection approaches, inverse theory, and fast reconstruction algorithms have greatly supported the rapid progress in this field. The unique contrast provided by molecular absorption in photoacoustic-optoacoustic-thermoacoustic methods has allowed for addressing unmet biological and medical needs such as pre-clinical research, clinical imaging of vasculature, tissue and disease physiology, drug efficacy, surgery guidance, and therapy monitoring. Applications of this field encompass a wide range of medical imaging and sensing applications, including cancer, vascular diseases, brain neurophysiology, ophthalmology, and diabetes. Moreover, photoacoustics-optoacoustics-thermoacoustics is a multidisciplinary field, with contributions from chemistry and nanotechnology, where novel materials such as biodegradable nanoparticles, organic dyes, targeted agents, theranostic probes, and genetically expressed markers are being actively developed. These advanced materials have significantly improved the signal-to-noise ratio and tissue contrast in photoacoustic methods.