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Liu L, Huan H, Zhang X, Zhang L, Zhan J, Jiang S, Yin X, Chen B, Shao X, Xu X, Mandelis A. Wavelength-modulated photoacoustic spectroscopic instrumentation system for multiple greenhouse gas detection and in-field application in the Qinling mountainous region of China. PHOTOACOUSTICS 2024; 38:100620. [PMID: 38911131 PMCID: PMC11190482 DOI: 10.1016/j.pacs.2024.100620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 05/03/2024] [Accepted: 05/10/2024] [Indexed: 06/25/2024]
Abstract
We present a sensitive and compact quantum cascade laser-based photoacoustic greenhouse gas sensor for the detection of CO2, CH4 and CO and discuss its applicability toward on-line real-time trace greenhouse gas analysis. Differential photoacoustic resonators with different dimensions were used and optimized to balance sensitivity with signal saturation. The effects of ambient parameters, gas flow rate, pressure and humidity on the photoacoustic signal and the spectral cross-interference were investigated. Thanks to the combined operation of in-house designed laser control and lock-in amplifier, the gas detection sensitivities achieved were 5.6 ppb for CH4, 0.8 ppb for CO and 17.2 ppb for CO2, signal averaging time 1 s and an excellent dynamic range beyond 6 orders of magnitude. A continuous outdoor five-day test was performed in an observation station in China's Qinling National Botanical Garden (E longitude 108°29', N latitude 33°43') which demonstrated the stability and reliability of the greenhouse gas sensor.
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Affiliation(s)
- Lixian Liu
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
- Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT), Department of Mechanical and Industrial Engineering, and Institute for Advanced Non-Destructive and Non-Invasive Diagnostic Technologies (IANDIT), University of Toronto, Toronto M5S 3G8, Canada
| | - Huiting Huan
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
- State Key Laboratory of Electromechanical lntegrated Manufacturing of High-performance Electronic Equipments, Xidian University, Xi’an 710071, China
| | - Xueshi Zhang
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Le Zhang
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Jinsong Zhan
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
- State Key Laboratory of Electromechanical lntegrated Manufacturing of High-performance Electronic Equipments, Xidian University, Xi’an 710071, China
| | - Shaowei Jiang
- School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Xukun Yin
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Baisong Chen
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Xiaopeng Shao
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
| | - Xuesen Xu
- School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
| | - Andreas Mandelis
- School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
- Center for Advanced Diffusion-Wave and Photoacoustic Technologies (CADIPT), Department of Mechanical and Industrial Engineering, and Institute for Advanced Non-Destructive and Non-Invasive Diagnostic Technologies (IANDIT), University of Toronto, Toronto M5S 3G8, Canada
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Fu L, Zhang J, Pan Y, Lu P. Differential photoacoustic spectroscopy for flow gas detection based on single microphone. PHOTOACOUSTICS 2024; 38:100624. [PMID: 38872921 PMCID: PMC11169465 DOI: 10.1016/j.pacs.2024.100624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2024] [Revised: 05/28/2024] [Accepted: 05/28/2024] [Indexed: 06/15/2024]
Abstract
Differential photoacoustic spectroscopy (PAS) for flow gas detection based on single microphone is innovatively proposed and experimentally demonstrated. Unlike the traditional systems, only one microphone is used to suppress flowing gas noise. Wavelength modulation spectroscopy and second harmonic detection technique are applied in this PAS system with Q-point demodulation for acetylene (C2H2) gas detection. The experiment is conducted at 1 atm and 300 K. Different concentrations and flow rates of C2H2 from 0 sccm to 225 sccm are detected by using nitrogen (N2) as the carrier gas, which indicates that the system can respond well to flowing gases while maintaining the noise at the same level. The system response time decreases to 3.58 s while the gas velocity is 225 sccm. The detection limit of 43.97 ppb with 1 s integration time and normalized noise equivalent absorption (NNEA) coefficient of 4.0 × 10-9 cm-1 W Hz-1/2 is achieved at the flow rate of 225 sccm. The firstly proposed differential PAS based on single microphone greatly simplifies the system structure for flow gas detection, which provides a novel route for development of PAS with significant practical implementation prospects.
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Affiliation(s)
- Lujun Fu
- Wuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiangshan Zhang
- School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yufeng Pan
- Wuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ping Lu
- Wuhan National Laboratory for Optoelectronics (WNLO) and National Engineering Research Center for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
- Wuhan OV Optical Networking Technology Co., Ltd., Wuhan 430074, China
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Wang J, Wang Q, Yan C, Xu S, Zou X, Wu Q, Ng WP, Binns R, Fu YQ. High-sensitivity narrow‑band T-shaped cantilever Fabry-perot acoustic sensor for photoacoustic spectroscopy. PHOTOACOUSTICS 2024; 38:100626. [PMID: 38966593 PMCID: PMC11222803 DOI: 10.1016/j.pacs.2024.100626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 06/03/2024] [Accepted: 06/03/2024] [Indexed: 07/06/2024]
Abstract
Photoacoustic spectroscopy (PAS) has been rapidly developed and applied to different detection scenarios. The acoustic pressure detection is an important part in the PAS system. In this paper, an ultrahigh sensitivity Fabry-Perot acoustic sensor with a T-shaped cantilever was proposed. To achieve the best acoustic pressure effect, the dimension of the cantilever structure was designed and optimized by finite element analysis using COMSOL Multiphysics. Simulation results showed that the sensitivity of such T-shaped cantilever was 1.5 times higher than that based on a rectangular cantilever, and the resonance frequency of T-shaped cantilever were able to modulate from 800 Hz to 1500 Hz by adjusting the multi-parameter characteristics. Experimental sensing results showed that the resonance frequency of T-shaped Fabry-Perot acoustic sensor was 1080 Hz, yielding a high sensitivity of 1.428 μm/Pa, with a signal-to-noise ratio (SNR) of 84.8 dB and a detectable pressure limit of 1.9 μPa/Hz1/2@1 kHz. We successfully used such acoustic sensor to measure acetylene (C2H2) concentration in the PAS. The sensitivity of PAS for C2H2 gas was 3.22 pm/ppm with a concentration range of 50 ppm ∼100 ppm, and the minimum detection limit was 24.91ppb.
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Affiliation(s)
- Jilong Wang
- College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
| | - Qiaoyun Wang
- College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
- Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China
| | - Chongyue Yan
- College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
| | - Shunyuan Xu
- College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
| | - Xin Zou
- College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning Province 110819, China
| | - Qiang Wu
- Faculty of Engineering & Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
| | - Wai Pang Ng
- Faculty of Engineering & Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
| | - Richard Binns
- Faculty of Engineering & Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
| | - Yong-Qing Fu
- Faculty of Engineering & Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UK
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Liu P, Wang C, Yang H, Li Y, Zhang X, Liu X, Li Y, Lou C. Perovskite photodetector-based laser absorption spectroscopy for gas detection. OPTICS EXPRESS 2024; 32:21855-21865. [PMID: 38859529 DOI: 10.1364/oe.527380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Accepted: 05/21/2024] [Indexed: 06/12/2024]
Abstract
A gas detection method based on CH3NH3PbI3 (MAPbI3) and poly (3,4-ethylenedioxythiophene): poly (4-styrene sulfonate) (PEDOT:PSS) composite photodetectors (PDs) is proposed. The operation of the PD primarily relies on the photoelectric effect within the visible light band. Our study involves constructing a gas detection system based on tunable diode laser spectroscopy (TDLAS) and MAPbI3/PEDOT:PSS PD, and O2 was selected as the target analyte. The system has achieved a minimum detection limit (MDL) of 0.12% and a normalized noise equivalent absorption coefficient (NNEA) of 8.83 × 10-11 cm-1⋅W⋅Hz-1/2. Furthermore, the Allan deviation analysis results indicate that the system can obtain sensitivity levels as low as 0.058% over an averaging time of 328 seconds. This marks the first use of MAPbI3/PEDOT:PSS PD in gas detection based on TDLAS. Despite the detector's performance leaves much to be desired, this innovation offers a new approach to developing spectral based gas detection system.
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Guo G, Li L, Zhou Y, Gong T, Tian Y, Sun X, Cui J, Shi S, Guo Z, He X, Qiu X, Sun J, Jiang C, Fittschen C, Li C. High-Sensitivity Differential Helmholtz Photoacoustic System Combined with the Herriott Multipass Cell and Its Application in Seed Respiration. Anal Chem 2024; 96:7730-7737. [PMID: 38703107 DOI: 10.1021/acs.analchem.4c00963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2024]
Abstract
A highly sensitive photoacoustic detection system using a differential Helmholtz resonator (DHR) combined with a Herriott multipass cell is presented, and its implementation to sub-ppm level carbon dioxide (CO2) detection is demonstrated. Through the utilization of erbium-doped optical fiber amplifier (EDFA), the laser power was amplified to 150 mW. Within the multipass cell, a total of 22 reflections occurred, contributing to an impressive 33.6 times improvement in the system sensitivity. The normalized noise equivalent absorption coefficient (NNEA) was 8.64 × 10-11 cm-1·W·Hz-1/2 [signal-to-noise ratio, (SNR) = 1] and according to the Allan variance analysis, a minimum detection limit of 500 ppb could be achieved for CO2 at 1204 s, which demonstrates the long-term stability of the system. The system was applied to detect the respiration of rice and upland rice seeds. It is demonstrated that the system can monitor and distinguish the respiration intensity and respiration rate of different seeds in real time.
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Affiliation(s)
- Guqing Guo
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Lin Li
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Yueting Zhou
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Ting Gong
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Yali Tian
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Xiaocong Sun
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Jiahua Cui
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Shuai Shi
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Zhenyu Guo
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Xiaohu He
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Xuanbing Qiu
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Jing Sun
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Chenyu Jiang
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, China
| | - Christa Fittschen
- CNRS, UMR 8522-PC2A─Physicochimie des Processus de Combustion et de l'Atmosphère, Université Lille, Lille F-59000, France
| | - Chuanliang Li
- Shanxi Province Engineering Research Center of Precision Measurement and Online Detection Equipment, Shanxi Center of Technology Innovation for Light Manipulations and Applications, School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
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Xue Q, Dong Y, Lu F, Yang H, Yu G. ELM combined with differential Raman spectroscopy for the detection of microplastics in organisms. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 312:124039. [PMID: 38364450 DOI: 10.1016/j.saa.2024.124039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 02/05/2024] [Accepted: 02/10/2024] [Indexed: 02/18/2024]
Abstract
Aiming at the problems of low extraction efficiency, high false detection rate, weak Raman signal and serious interference by fluorescence signal in the detection of microplastics in marine organisms, this paper establishes a set of rapid detection methods for microplastics in organisms, including confocal Raman spectroscopy, fluorescence imaging, differential Raman spectroscopy, and rapid identification of microplastics based on the ELM modeling assistance. Firstly, to address the problem of low extraction efficiency of microplastics, we explored and optimized the digestion method of tissues, which effectively improved the digestion effect of fish tissues and excluded the influence of tissues on microplastics detection. Aiming at the problems of high misdetection rate and low pre-screening efficiency of microplastics, fluorescence imaging technology is adopted to realize the visualization and detection of microplastics, which effectively improves the detection efficiency and precision of microplastics. Based on the confocal microscopy Raman spectroscopy detection system built independently in the laboratory, using 784/785 nm as the excitation light, the differential Raman spectroscopy technique effectively excludes the interference of fluorescence signals in the Raman spectra, and improves the signal-to-noise ratio of the Raman spectra, and the recovery rate of the Raman characteristic peaks in the differential Raman spectroscopy reaches 100 % compared to the traditional baseline correction method, which is 33.3 % higher than that of the baseline correction method. Finally, a microplastic identification model is constructed based on ELM to assist in realizing the rapid and accurate identification of microplastics. The more complete detection method of microplastics in marine organisms proposed in this paper can realize the rapid and nondestructive, efficient and accurate detection of microplastics in fish, which can help to further promote the development of marine microplastics monitoring technology.
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Affiliation(s)
- Qingsheng Xue
- School of Physics and Optoelectronic Engineering, Department of Information Science and Engineering, Ocean University of China, Engineering Research Center of Advanced Marine Physical Instruments and Equipment, Ministry of Education, Qingdao, 266100, China.
| | - Yang Dong
- School of Physics and Optoelectronic Engineering, Department of Information Science and Engineering, Ocean University of China, Engineering Research Center of Advanced Marine Physical Instruments and Equipment, Ministry of Education, Qingdao, 266100, China
| | - Fengqin Lu
- School of Physics and Optoelectronic Engineering, Department of Information Science and Engineering, Ocean University of China, Engineering Research Center of Advanced Marine Physical Instruments and Equipment, Ministry of Education, Qingdao, 266100, China
| | - Hui Yang
- School of Physics and Optoelectronic Engineering, Department of Information Science and Engineering, Ocean University of China, Engineering Research Center of Advanced Marine Physical Instruments and Equipment, Ministry of Education, Qingdao, 266100, China
| | - Guiting Yu
- School of Physics and Optoelectronic Engineering, Department of Information Science and Engineering, Ocean University of China, Engineering Research Center of Advanced Marine Physical Instruments and Equipment, Ministry of Education, Qingdao, 266100, China
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Qiao S, He Y, Sun H, Patimisco P, Sampaolo A, Spagnolo V, Ma Y. Ultra-highly sensitive dual gases detection based on photoacoustic spectroscopy by exploiting a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser. LIGHT, SCIENCE & APPLICATIONS 2024; 13:100. [PMID: 38693126 PMCID: PMC11063167 DOI: 10.1038/s41377-024-01459-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/11/2024] [Accepted: 04/14/2024] [Indexed: 05/03/2024]
Abstract
Photoacoustic spectroscopy (PAS) as a highly sensitive and selective trace gas detection technique has extremely broad application in many fields. However, the laser sources currently used in PAS limit the sensing performance. Compared to diode laser and quantum cascade laser, the solid-state laser has the merits of high optical power, excellent beam quality, and wide tuning range. Here we present a long-wave, high-power, wide-tunable, single-longitudinal-mode solid-state laser used as light source in a PAS sensor for trace gas detection. The self-built solid-state laser had an emission wavelength of ~2 μm with Tm:YAP crystal as the gain material, with an excellent wavelength and optical power stability as well as a high beam quality. The wide wavelength tuning range of 9.44 nm covers the absorption spectra of water and ammonia, with a maximum optical power of ~130 mW, allowing dual gas detection with a single laser source. The solid-state laser was used as light source in three different photoacoustic detection techniques: standard PAS with microphone, and external- and intra-cavity quartz-enhanced photoacoustic spectroscopy (QEPAS), proving that solid-state laser is an attractive excitation source in photoacoustic spectroscopy.
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Affiliation(s)
- Shunda Qiao
- National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin, China
| | - Ying He
- National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin, China
| | - Haiyue Sun
- National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin, China
| | - Pietro Patimisco
- PolySense Lab, Dipartimento Interateneo di Fisica, University and Politecnico of Bari, Via Amendola, Bari, Italy
| | - Angelo Sampaolo
- PolySense Lab, Dipartimento Interateneo di Fisica, University and Politecnico of Bari, Via Amendola, Bari, Italy
| | - Vincenzo Spagnolo
- PolySense Lab, Dipartimento Interateneo di Fisica, University and Politecnico of Bari, Via Amendola, Bari, Italy
| | - Yufei Ma
- National Key Laboratory of Laser Spatial Information, Harbin Institute of Technology, Harbin, China.
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Wang F, Fu L, Zhang J, Han Z, Pang S, Xue Q, Cao D, Li Q, Wang Q. TT-type resonator-based differential photoacoustic spectroscopy for trace gas detection. OPTICS LETTERS 2024; 49:2173-2176. [PMID: 38621104 DOI: 10.1364/ol.520154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/25/2024] [Indexed: 04/17/2024]
Abstract
A novel TT-type resonator was proposed for the first time, to our knowledge, to realize differential photoacoustic (PA) detection for trace gas measurement. The special design of the TT-type resonator allows us to install the microphone at the resonant center of the acoustic field to maximize the use of the absorption-induced PA signal. To meet the requirement of low gas consumption and easy integration, the TT-type resonator-based PA cell was fabricated as a fiber-coupled module with an inner volume of only 1.1 ml. For validation, the TT-type PA cell was integrated to a photoacoustic spectroscopy (PAS) system for acetylene detection. As a result, a linearity of 0.99999 was achieved in a concentration range from 0 to 5000 ppm with a noise equivalent sensitivity of 101 ppb. The proposed TT-type resonator contributes a new style of PA cell structure to the field of PAS gas detection, combining the advantages of easy integration, low gas consumption, differential detection, and photoacoustic enhancement together.
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Tian S, Chen P, Jiao M, Mu K, Gao Y, Qiao Y, Li L, Shan C. Geometry optimization of cantilever-based optical microphones. OPTICS LETTERS 2024; 49:2101-2104. [PMID: 38621086 DOI: 10.1364/ol.519135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/25/2024] [Indexed: 04/17/2024]
Abstract
The introduction of cantilever-based fiber-optic microphones (FOMs) has proven to be effective in acoustic sensing. Further improvements in cantilevers face two key constraints: the challenge of achieving minimal sizes with sufficient reflective area and the trade-off between sensitivity and response bandwidth. Herein, we present a geometry optimization framework for a cantilever-based FOM that addresses this issue. Employing drumstick-shaped cantilevers housed within a Fabry-Perot (F-P) interferometric structure, we showcase a heightened sensitivity of 302.8 mV/Pa at 1 kHz and a minimum detectable acoustic pressure (MDP) of 2.35 µPa/H z. Notably, these metrics outperform those of the original rectangular cantilever with identical dimensions. Furthermore, our proposed cantilever effectively mitigates the reduction in resonance frequencies, thereby improving the response bandwidth. This geometry optimization framework offers considerable design flexibility and scalability, making it especially suitable for high-performance acoustic sensing applications.
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Hu Z, Shi Y, Niu M, Li T, Li H, Liu H, Li X, Jiang B. Near-infrared dual-gas sensor for simultaneous detection of CO and CH 4 using a double spot-ring plane-concave multipass cell and a digital laser frequency stabilization system. OPTICS EXPRESS 2024; 32:14169-14186. [PMID: 38859370 DOI: 10.1364/oe.521613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/20/2024] [Indexed: 06/12/2024]
Abstract
A novel double spot-ring plane-concave multipass cell (DSPC-MPC) gas sensor was proposed for simultaneous detection of trace gases, which has lower cost and higher mirror utilization than the traditional multipass cell with 129 m, 107 m, 85 m, 63 m and 40 m effective optical path lengths adjustable. The performance of the DSPC-MPC gas sensor was evaluated by measuring CO and CH4 using two narrow linewidth distributed feedback lasers with center wavelengths of 1567 nm and 1653 nm, respectively. An adjustable digital PID laser frequency stabilization system based on LabVIEW platform was developed to continuously stabilize the laser frequency within ∼±30.3 MHz. The Allan deviation results showed that the minimum detection limits for CO and CH4 were 0.07 ppmv and 0.008 ppmv at integration times of 711 s and 245 s, respectively. The proposed concept of DSPC-MPC provides more ideas for the realization of gas detection under different absorption path lengths and the development of multi-component gas sensing systems.
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Zhao X, Ma F, Wang H, Qi H, Li C, Guo M, Chen K. Fiber-Optic Photoacoustic CO Sensor for Gas Insulation Equipment Monitoring Based on Cantilever Differential Lock-In Amplification and Optical Excitation Enhancement. Anal Chem 2024; 96:5298-5306. [PMID: 38507227 DOI: 10.1021/acs.analchem.4c00233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
A fiber-optic photoacoustic CO sensor for gas insulation equipment is proposed, which relies on F-P interferometric cantilever-based differential lock-in amplification and optical multipass excitation enhancement. The sensor has excellent characteristics of high sensitivity, antielectromagnetic interference, fast response, and long-distance detection. The photoacoustic pressure waves in the two resonators of the differential photoacoustic cell (DPAC) are simultaneously detected by two fiber-optic interferometric cantilevers and processed differentially; thereby, the gas flow noise is effectively suppressed. Based on the comprehensive analysis of the superposition of photoacoustic excitation and multipass absorption, the diameter of the resonator is determined to be 6 mm. The optical power emitted by the 1566.6 nm distributed feedback laser is increased to 500 mW by an erbium-doped fiber amplifier. The near-infrared light is reflected 30 times in the multipass cell, which improves the order of magnitude of optical effective excitation. Due to the low sound velocity of SF6 gas, the resonant frequency of the DPAC with a resonator length of 80 mm is 760 Hz. The response time to CO/SF6 gas is 93 s with a flow rate of 500 sccm. The detection limit of the CO sensor is 53 ppb, which realizes the accurate and timely perception of the SF6 decomposition derivative CO and provides technical support for trouble-free operation of gas insulation equipment.
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Affiliation(s)
- Xinyu Zhao
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Fengxiang Ma
- Electric Power Research Institute, Net Anhui Electric Power Co., Ltd, Hefei, Anhui 230601, China
| | - Heng Wang
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Hongchao Qi
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Chenxi Li
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China
| | - Min Guo
- Department of Physics, Shaoxing University, Shaoxing, Zhejiang 312000, China
| | - Ke Chen
- School of Optoelectronic Engineering and Instrumentation Science, Dalian University of Technology, Dalian, Liaoning 116024, China
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Liang T, Qiao S, Chen Y, He Y, Ma Y. High-sensitivity methane detection based on QEPAS and H-QEPAS technologies combined with a self-designed 8.7 kHz quartz tuning fork. PHOTOACOUSTICS 2024; 36:100592. [PMID: 38322619 PMCID: PMC10844118 DOI: 10.1016/j.pacs.2024.100592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/08/2024]
Abstract
Methane (CH4) is a greenhouse gas as well as being flammable and explosive. In this manuscript, quartz-enhanced photoacoustic spectroscopy (QEPAS) and heterodyne QEPAS (H-QEPAS) exploring a self-designed quartz tuning fork (QTF) with resonance frequency (f0) of ∼8.7 kHz was utilized to achieve sensitive CH4 detection. Compared with the standard commercial 32.768 kHz QTF, this self-designed QTF with a low f0 and large prong gap has the merits of long energy accumulation time and low optical noise. The strongest line located at 6057.08 cm-1 in the 2v3 overtone band of CH4 was chosen as the target absorption line. A diode laser with a high output power of > 30 mW was utilized as the excitation source. Acoustic micro-resonators (AmRs) were added to the sensor architecture to amplify the intensity of acoustic waves. Compared to the bare QTF, after the addition of AmRs, a signal enhancement of 149-fold and 165-fold were obtained for QEPAS and H-QEPAS systems, respectively. The corresponding minimum detection limits (MDLs) were 711 ppb and 1.06 ppm for QEPAS and H-QEPAS sensors. Furthermore, based on Allan variance analysis the MDLs can be improved to 19 ppb and 27 ppb correspondingly. Compared to the QEPAS sensor, the H-QEPAS sensor shows significantly shorter measurement timeframes, allowing for measuring the gas concentration quickly while simultaneously obtaining f0 of QTF.
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Affiliation(s)
- Tiantian Liang
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Shunda Qiao
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Yanjun Chen
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Ying He
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Yufei Ma
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
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Chen W, Qiao S, He Y, Zhu J, Wang K, Qi L, Zhou S, Xiao L, Ma Y. Mid-infrared all-fiber light-induced thermoelastic spectroscopy sensor based on hollow-core anti-resonant fiber. PHOTOACOUSTICS 2024; 36:100594. [PMID: 38375332 PMCID: PMC10875298 DOI: 10.1016/j.pacs.2024.100594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 02/21/2024]
Abstract
In this article, a mid-infrared all-fiber light-induced thermoelastic spectroscopy (LITES) sensor based on a hollow-core anti-resonant fiber (HC-ARF) was reported for the first time. The HC-ARF was applied as a light transmission medium and gas chamber. The constructed all-fiber structure has merits of low loss, easy optical alignment, good system stability, reduced sensor size and cost. The mid-infrared transmission structure can be utilized to target the strongest gas absorption lines. The reversely-tapered SM1950 fiber and the HC-ARF were spatially butt-coupled with a V-shaped groove between the two fibers to facilitate gas entry. Carbon monoxide (CO) with an absorption line at 4291.50 cm-1 (2.33 µm) was chosen as the target gas to verify the sensing performance. The experimental results showed that the all-fiber LITES sensor based on HC-ARF had an excellent linear response to CO concentration. Allan deviation analysis indicated that the system had excellent long-term stability. A minimum detection limit (MDL) of 3.85 ppm can be obtained when the average time was 100 s.
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Affiliation(s)
- Weipeng Chen
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Shunda Qiao
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Ying He
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
| | - Jie Zhu
- Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai, China
| | - Kang Wang
- Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai, China
| | - Lei Qi
- Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China
| | - Sheng Zhou
- Laser Spectroscopy and Sensing Laboratory, Anhui University, Hefei 230601, China
| | - Limin Xiao
- Advanced Fiber Devices and Systems Group, Key Laboratory of Micro and Nano Photonic Structures (MoE), Key Laboratory for Information Science of Electromagnetic Waves (MoE), Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, School of Information Science and Technology, Fudan University, Shanghai, China
| | - Yufei Ma
- National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China
- Zhengzhou Research Institute, Harbin Institute of Technology, Zhengzhou 450000, China
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Gong B, Mao S, Li X, Chen B. Mineral oil emulsion species and concentration prediction using multi-output neural network based on fluorescence spectra in the solar-blind UV band. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024. [PMID: 38470293 DOI: 10.1039/d3ay01820b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
The accurate monitoring of oil spills is crucial for effective oil spill recovery, volume determination, and cleanup. Oil slicks become emulsified under the effects of wind and waves, which increases the consistency of the oil spills. This phenomenon makes oil spills more challenging to handle and exacerbates environmental pollution. In this study, the variation of the solar-blind ultraviolet (UV) fluorescence spectra obtained from simulated oil spills with different oil types and oil-water ratios was investigated. By designing and constructing a multi-angle excitation and detection system, an apparent fluorescence peak of the oil emulsions was observed at around 290 nm under 220 nm excitation. By utilizing competitive adaptive reweighted sampling (CARS) and multi-output neural network algorithms, both the types and concentrations of the emulsified oils were obtained simultaneously. The classification accuracy for identifying the oil type exceeds 98%, and the mean absolute percentage error (MAPE) for concentration regression is around 2%. The results indicate that active solar-blind UV fluorescence could become a supplementary method for on-site oil spill detection to achieve comprehensive monitoring of oil spills. This study provides potential applications for UV-induced fluorescence spectrometry in oil spill on-site monitoring during the daytime.
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Affiliation(s)
- Bowen Gong
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin Province, 130033, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shilei Mao
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin Province, 130033, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xinkai Li
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin Province, 130033, China.
| | - Bo Chen
- Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin Province, 130033, China.
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Liang M, Yang K, Feng M, Mu K, Jiao M, Li L. Acoustic Imaging Method for Gas Leak Detection and Localization Using Virtual Ultrasonic Sensor Array. SENSORS (BASEL, SWITZERLAND) 2024; 24:1366. [PMID: 38474901 DOI: 10.3390/s24051366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2023] [Revised: 02/15/2024] [Accepted: 02/17/2024] [Indexed: 03/14/2024]
Abstract
An acoustic imaging method for detecting and locating gas leaks based on a virtual ultrasonic sensor array is proposed and experimentally demonstrated. A scanning sensor array of only two sensors is used to collect the acoustic signals generated by the leakage hole. The matrix of the leakage signal is processed by the cross-power spectrum method to achieve time consistency, afterward, the location of the leakage source can be calculated by the virtual beamforming method. The influence of the number of sensors and the distance between adjacent sensors on the effect of the proposed method are compared and discussed. To verify the effectiveness and operability of the detection and localization method, several experiments were carried out. Furthermore, a series of experiments were conducted to assess the accuracy and stability of this method. The experimental results demonstrate that the proposed method based on a virtual sensor array can achieve highly accurate localization of gas leaks and performs well regarding stability.
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Affiliation(s)
- Mu Liang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Kuan Yang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Mingyang Feng
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Kaijun Mu
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Mingqi Jiao
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
| | - Lei Li
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China
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