Laser absorption sensing systems: challenges, modeling, and design optimization

Z Wang, P Fu, X Chao - Applied Sciences, 2019 - mdpi.com
Laser absorption spectroscopy (LAS) is a promising diagnostic method capable of providing
high-bandwidth, species-specific sensing, and highly quantitative measurements. This …

Retrieval of gas concentrations in optical spectroscopy with deep learning

L Tian, J Sun, J Chang, J Xia, Z Zhang, AA Kolomenskii… - Measurement, 2021 - Elsevier
A novel direct absorption spectroscopy gas sensing system based on end-to-end deep
neural networks was proposed for measurements of gas concentration. One-dimensional …

Methane concentration measurement method in rain and fog coexisting weather based on TDLAS

H Yang, X Bu, Y Song, Y Shen - Measurement, 2022 - Elsevier
A method of methane concentration measurement in rain and fog coexisting weather based
on the tunable diode laser absorption spectroscopy combined with the Monte Carlo …

Gas phase multicomponent detection and analysis combining broadband dual-frequency comb absorption spectroscopy and deep learning

L Tian, J Xia, AA Kolomenskii, HA Schuessler… - Communications …, 2023 - nature.com
In absorption spectroscopy, analysis of multicomponent gas mixtures becomes challenging
when absorption features overlap (blended spectra). Here we propose a gas sensor which …

Terahertz fingerprint characterization of 2, 4-dichlorophenoxyacetic acid and its enhanced detection in food matrices combined with spectral baseline correction

F Qu, L Lin, C Cai, B Chu, Y Wang, Y He, P Nie - Food Chemistry, 2021 - Elsevier
Rapid and accurate detection of pesticide residues in food matrices are of great significance
to food safety. This study aimed to characterize the fingerprint peaks of 2, 4 …

TDL-based spectroscopy for simultaneous measurement of multiple gas properties using a single absorption line

H Shim, G Kim, S Jung, G Park - Journal of Mechanical Science and …, 2023 - Springer
This study presents a single-line absorption spectroscopy method for the simultaneous
measurement of gas pressure and temperature through diode laser absorption spectroscopy …

Noise immune absorption profile extraction for the TDLAS thermometry sensor by using an FMCW interferometer

W Zhou, Z Cao, G Hou, L Xu - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
Tunable diode laser absorption spectroscopy (TDLAS) techniques usually utilize direct
absorption spectroscopy (DAS) to measure absorbance profiles for temperature …

Baseline reduction algorithm for direct absorption spectroscopy with interference features

Z Wang, P Fu, X Chao - Measurement Science and Technology, 2019 - iopscience.iop.org
A baseline reduction algorithm for determining gas temperature and concentration from
absorption spectra with interfering features using direct absorption spectroscopy is …

Gaussian process regression for direct laser absorption spectroscopy in complex combustion environments

W Wang, Z Wang, X Chao - Optics Express, 2021 - opg.optica.org
Tunable diode laser absorption spectroscopy (TDLAS) has been proved to be a powerful
diagnostic tool in combustion research. However, current methods for post-processing a …

Quantification of Elevated Hydrogen Cyanide (HCN) Concentration Typical in a Residential Fire Environment Using Mid-IR Tunable Diode Laser

S Ghanekar, GP Horn, RM Kesler, R Rajasegar… - Applied …, 2023 - opg.optica.org
A versatile portable tunable diode laser based measurement system for measuring elevated
concentrations of hydrogen cyanide (HCN) in a time-resolved manner is developed for …