Second-Order Correlation Function Supported Optical Sensing for Particle Detection

Wang, Tao; Jiang, Can; Zou, Jin Long; Zhou, Hui; Lin, Xiao; Chen, Hongsheng; Puccioni, G. P.; Wang, Gaofeng; Lippi, G. L.

doi:10.1109/jsen.2021.3093074

Cited by 9 publications

(5 citation statements)

References 50 publications

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“…In order to verify the above analysis, the CMAG 3475 aerosol generator of TSI Company is used to generate particles with different particle sizes for experiments, and the relationship between the concentration of particles with different particle sizes and the scattered light intensity is recorded [17]. CMAG 3475 is an aerosol generator using the Sinclair-Lamer condensation technology, which can produce aerosols of different sizes by setting the temperature and airflow.…”

Section: Influence Of the Particle Size Distribution Changes On The C...mentioning

confidence: 99%

Detection of Particle Concentration and Particle Size Based on Aerodynamic Particle Size Spectrometer

Zhang

Hou

2022

Advances in Multimedia

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In order to solve the problem of the continuous online monitoring of the fixed pollution source emission particles, on the basis of the advantages and disadvantages of the comprehensive analysis of the extinction method, the β-ray absorption method, the micro-oscillating balance method, the charge transfer method, and the light scattering method, the particle size distribution and concentration optical detection system based on aerodynamic particle size spectrometer is designed according to the Mie light scattering principle. A high-performance aerodynamic particle size spectrometer is designed using a single-wavelength method to measure the concentration of particulate matter, and the equipment and the detection system are used in the continuous monitoring of particulate matter emitted by thermal power plants and compared with the ES632 equipment. Through the system test, the results show that compared with the ES632 equipment performance, the lowest concentration measured by the design of aerodynamic particle size spectrometer equipment can reach 0.1 mg/m3 with a measurement accuracy of 0.01 mg/m3. Compared with the ES632 equipment, the measurement concentration value is 8% higher, which meets the test requirements.

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Section: Influence Of the Particle Size Distribution Changes On The C...mentioning

confidence: 99%

Detection of Particle Concentration and Particle Size Based on Aerodynamic Particle Size Spectrometer

Zhang

Hou

2022

Advances in Multimedia

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“…Some experiments have been conducted to test the instrument’s performance using TSI Company’s 3410U and CMAG 3475 aerosol generators. These generators generate particles of varying sizes for experimentation, and the relationship between particle concentration and scattered light intensity is observed [ 31 ]. The 3410U is an aerosol generator, which produces aerosols of different sizes from 0.5 μm to 100 μm.…”

Section: Resultsmentioning

confidence: 99%

A Novel Optical Instrument for Measuring Mass Concentration and Particle Size in Real Time

Zhang

Hou

et al. 2023

Sensors

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Particle mass and particulate size are two important parameters used to characterize the aerosol. Currently, there are a few methods for measuring particle mass concentration and particle size. However, the existing methods have their own shortcomings. In this article, we describe a novel laser scattering instrument that measures mass concentration and particle size in real time over a wide concentration range. This instrument combines laser scattering and time-of-flight aerodynamics in one optical device. There are two innovations in this paper: (1) Two APD detectors are used to receive scattered light. One receives forward-scattered light and the other receives side-scattered light. The advantage is that the sensitivity of the detector is increased greatly, and the ratio of forward and side scattering is used to further obtain the size and shape information of the particles. (2) In order to measure the high concentrations of aerosol, a high-speed ADC and FPGA is combined to achieve an anti-overlap algorithm objective. It has been verified by experiments that the anti-overlapping algorithm can effectively improve the applicability of the aerodynamic particle size spectrometer under high concentration conditions.

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“…79 However, specific threshold dynamics offer prospects for pulse generation, 80 low-coherence, speckle-free illumination, 81 and autocorrelation-based sensing. 82 Fast laser modulation holds significant applicative interest, notably in telecommunications and data handling, and has been extensively explored in various implementations. [83][84][85][86] Ultrafast parametric processes have been observed in a photonic crystal device, 87 with pulses generated through cavity dumping, 88 and a specialized mode-locking configuration 89 successfully coupling a few low-order modes in a nanocavity.…”

Section: Nanolaser Dynamicsmentioning

confidence: 99%

Statistics and dynamics in micro- and nanolasers

Puccioni,

Wang,

Lippi

2024

Semiconductor Lasers and Laser Dynamics XI

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We consider two issues concerning the dynamics of nanolasers: the impact of their large noise on the deterministic trajectories and the interpretation of the statistical results coming from the photon statistics. The second issue, due to the lack of sufficiently sensitive and fast detectors, represents an unavoidable bottleneck in the analysis of any dynamics and is discussed in detail. Our study reveals several important results. Statistics and dynamics provide complementary information, but the former is not able to reliably distinguish different dynamical regimes. Inferring a coherence emission regime, or degree of coherence, from autocorrelation functions is fraught with interpretative traps. Finally, we address the challenge posed by external noise, which dramatically distorts the statistical information derived from the autocorrelations. We introduce an empirical indicator capable of identifying the lowest pump value from which autocorrelation values become reliable, based on a single sequence of noisy data that can be applied to the same-time, second-order autocorrelation function. This indicator is a valuable tool for experimentalists.

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Second-Order Correlation Function Supported Optical Sensing for Particle Detection

Cited by 9 publications

References 50 publications

Detection of Particle Concentration and Particle Size Based on Aerodynamic Particle Size Spectrometer

Detection of Particle Concentration and Particle Size Based on Aerodynamic Particle Size Spectrometer

A Novel Optical Instrument for Measuring Mass Concentration and Particle Size in Real Time

Statistics and dynamics in micro- and nanolasers

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