Journal Publications (*corresponding author)

  • "Battery-driven formaldehyde sensor", K. Duan, et al., under review.

  • "Smoldering combustion emission monitoring", M. Raza, et al., under review.

  • "MIR spectroscopy with chalcogenide hollow-core fiber", M. Hu, et al., under review.

  • "iCW-WMS", Y. Ji, et al., under review.

  • "NH3/NO dual-gas sensing", K. Duan, et al., under review.

  • "Photothermal gas detection with a dithered FPI", C. Yao, et al., under review.

2022

1. "Dual-comb photothermal spectroscopy", Q. Wang*, Z. Wang*, H. Zhang, S. Jiang, Y. Wang, W. Jin, and W. Ren*, Nature Communications, 13, 2181 (2022). (link

2. "Trace gas detection in a hollow-core antiresonant fiber with heterodyne phase-sensitive dispersion spectroscopy", M. Hu, A. Ventura, J. Hayashi, F. Poletti, S. Yao, and W. Ren*, Sensors and Actuators B, 363, 131774 (2022). (link)

3. (Invited Review) "Laser sensors for energy systems and process industries: Perspectives and directions", A. Farooq*, A. Alquaity, M. Raza, E. F. Nasir, S. Yao, and W. Ren, Progress in Energy and Combustion Science, 91, 10097 (2022). (link)

4. "Development of an infrared laser absorption sensor for non-intrusive gas temperature measurements", K. Duan, D.-X. Wen, Y. Wang, L. Ma*, K.-P. Cheong, C. Yuan, and W. Ren, Energetic Materials Frontiers, 3(1), 10-17 (2022). (link)

5. "Mid-infrared CO2 sensor with blended absorption features for non-uniform laminar premixed flames", Z. Wang, W. Wang, L. Ma, P. Fu, W. Ren, and X. Chao*,  Applied Physics B, 128, 31 (2022). (link)

6. "Hybrid constraint multi-line absorption spectroscopy for non-uniform thermochemical measurements in axisymmetric laminar and jet flames", L. Ma*, K.-P. Cheong*, K. Duan, C. Yuan, and W. Ren, Optics and Lasers in Engineering, 154, 107014 (2022). (link)

7. "Wavelength-modulation dispersion spectroscopy of NO with heterodyne phase-sensitive detection", M. Hu and W. Ren*, Optics Letters, 47(11), 2899-2902 (2022). (link)

8. "Simultaneous methane and acetylene detection using frequency-division multiplexed laser absorption", M. Raza, K. Xu, Z. Lu, and W. Ren*, Optics & Laser Technology, 154, 108285 (2022). (link)

9. "Measurement of temperature-dependent line parameters of ammonia transitions near 1103 cm-1", K. Duan, Y. Ji*, Z. Lu, and W. Ren*, Journal of Quantitative Spectroscopy & Radiative Transfer, 288, 108269 (2022). (link)

10. "A CGA-ONIOM-DFT framework for accurate and efficient determination of thermodynamics and Kinetics: Case study of cyclopentane reaction with hydroxyl radical", J. Wu*, H. Ning, and W. Ren*, Chemical Physics Letters, 801, 139714 (2022). (link)

11. "High-temperature ammonia detection using heterodyne phase-sensitive dispersion spectroscopy at 9.06 μm", K. Duan, Y. Ji, M. Hu, Z. Lu, S. Yao, and W. Ren*, Fuel, 325, 124852 (2022). (link)

12. "Photothermal multi-species detection in a hollow-core fiber with frequency-division multiplexing", Z. Wang, H. Zhang, J. Wang, S. Jiang, S. Gao, Y. Wang, W. Jin, Q. Wang*, and W. Ren, Sensors and Actuators B, 369, 132333 (2022). (link)

13. "Doubly resonant sub-ppt photoacoustic gas detection with eight decades dynamic range", Z. Wang, Q. Wang*, H. Zhang, S. Borri, I. Galli, A. Sampaolo, P. Patimisco, V. L. Spagnolo, P. D. Natale, and W. Ren*, Photoacoustics, 27, 100387 (2022). (link)

14. "A coherent-averaged dual-comb spectrometer based on environment-shared fiber lasers and digital error correction", H. Yu, Y. Li, Q. Ma, Q. Zhou, X. Li, W. Ren, and K. Ni*, Optics & Laser Technology, 156, 108498 (2022). (link)

15. "Mid-infrared photothermal gas sensor enabled by core-cladding mode interference in a hollow-core fiber", M. Hu, A. Ventura, J. Hayashi, F. Poletti, and W. Ren*, Journal of Lightwave Technology, accepted (2022). (link)

16. "Mid-infrared absorption spectroscopic sensor for simultaneous and in-situ measurements of ammonia, water and temperature", Y. Ji, K. Duan, Z. Lu, and W. Ren*, Sensors and Actuators B, 371, 132574 (2022). (link)

2021

1. "Shock tube measurement of NO time-histories in nitromethane pyrolysis using a quantum cascade laser at 5.26 μm", Y. Shang, Z. Wang, L. Ma, J. Shi, H. Ning*, W. Ren*, and S. Luo, Proceedings of the Combustion Institute, 38(1), 1745-1752 (2021). (link)

2. "Dual-comb spectroscopy for laminar premixed flames with a free-running fiber laser", K. Xu, L. Ma, J. Chen, X. Zhao, Q. Wang, R. Kan, Z. Zheng, and W. Ren*, Combustion Science and Technology, DOI:10.1080/00102202.2021.1879796. (link)

3. "On the quantification of boundary layer effects on flame temperature measurements using line-of-sight absorption spectroscopy", L. Ma, K.-P. Cheong*, M. Yang, C. Yuan, and W. Ren*, Combustion Science and Technology, DOI:10.1080/00102202.2021.1925657. (link)

4. "Tellurite hollow-core antiresonant fiber-coupled quantum cascade laser absorption spectroscopy", C. Yao#, M. Hu#, A. Ventura, J. G. Hayashi*, F. Poletti, and W. Ren*, Journal of Lightwave Technology, 39(17), 5662-5668 (2021). (link)

5. "High-temperature dual-species (CO/NH3) detection using calibration-free scanned-wavelength-modulation spectroscopy at 2.3 μm", M. Raza, L. Ma*, S. Yao, L. Chen, and W. Ren*, Fuel, 305, 121591 (2021). (link)

6. "Tunable diode laser-based two-line thermometry: a noncontact thermometer for active body temperature measurement", K. Duan, L. Ma, Y. Yi, and W. Ren*, Applied Optics, 60(23), 7036-7042 (2021). (link)

7. "Heterodyne interferometric photothermal spectroscopy for gas detection in a hollow-core fiber", C. Yao, S. Gao, Y. Wang, W. Jin, and W. Ren*, Sensors and Actuators B, 346, 130528 (2021). (link)

8. "Multispectral infrared absorption spectroscopy for quantitative temperature measurements in axisymmetric laminar premixed sooting flames", L. Ma*, K. Duan, K.-P. Cheong*, C. Yuan, and W. Ren, Case Studies in Thermal Engineering, 28, 101575 (2021). (link)

9. "Transient tracer gas measurements: Development and evaluation of a fast-response SF6 measuring system based on quartz-enhanced photoacoustic spectroscopy", L. Fu, M. Yang, J. Niu, W. Ren*, and R. You*, Indoor Air, in press (2021). (link)

10. "Accurate temperature prediction with small absorption spectral data enabled by transfer machine learning", Y. Yi, K. Duan, K. Ni, R. Li, and W. Ren*, Optics Express, 29(25), 40699-40709 (2021). (link)

11. "Mid-infrared cavity-enhanced absorption sensor for ppb-level N2O detection using an injection-current-modulated quantum cascade laser", M. Yang, Z. Wang, Q. Nie, K. Ni, and W. Ren*, Optics Express, 29(25), 41634-41642 (2021). (link)

2020

1. "Sub-ppm CO detection in a sub-meter-long hollow-core negative curvature fiber using absorption spectroscopy at 2.3 µm", C. Yao, L. Xiao, S. Gao, Y. Wang, P. Wang, R. Kan, W. Jin, and W. Ren*, Sensors and Actuators B, 305, 127238 (2020). (link)

2. "Exploring the pyrolysis chemistry of prototype aromatic ester phenyl formate: Reaction pathways, thermodynamics and kinetics", H. Ning, J. Wu, L. Ma, and W. Ren*, Combustion and Flame, 211, 337-346 (2020). (link)

3. "An improved study of the uniformity of laminar premixed flames using laser absorption spectroscopy and CFD simulation", L. Ma, K.-P. Cheong, H. Ning, and W. Ren*, Experimental Thermal and Fluid Science, 112, 110013 (2020). (link)

4. "Multipass-assisted dual-comb gas sensor for multi-species detection using a free-running fiber laser", K. Xu, X. Zhao, Z. Wang, J. Chen, T. Li, Z. Zheng*, and W. Ren*, Applied Physics B, 126, 39 (2020). (link)

5. "Anharmonic kinetics of the cyclopentane reaction with hydroxyl radical", J. Wu, L. Gao, W. Ren*, D. Truhlar*, Chemical Science - The Royal Society of Chemistry, 11, 2511-2523 (2020). (link)

6. "Active modulation of intracavity laser intensity with Pound-Drever-Hall locking for photoacoustic spectroscopy", Z. Wang, H. W, Y. Li, R. Kan, and W. Ren*, Optics Letters, 45(5), 1148-1151 (2020). (link)

7. "Direct dynamics of a large complex hydrocarbon reaction system: The reaction of OH with exo-Tricyclodecane (the main component of Jet Propellant-10)", J. Wu, L. G. Gao, H. Ning, W. Ren*, and D. G. Truhlar*, Combustion and Flame, 216, 82-91 (2020). (link)

8. (VIP-Very Important Paper) "Water catalysis of the reaction of methanol with OH radical in the atmosphere is negligible", J. Wu, L. G. Gao, Z. Varga, X. Xu*, W. Ren*, and D. G. Truhlar*, Angewandte Chemie - International Edition, 59, 10826-10830 (2020). (link)

9. "Rapid field measurement of ventilation rate using a quartz-enhanced photoacoustic SF6 gas sensor", Z. Wang#, M. Yang#, L. Fu, C. Chen, R. You*, and W. Ren*, Measurement Science and Technology, 31, 085105 (2020). (link)

10. "Silica hollow-core negative curvature fibers enable ultrasensitive mid-infrared absorption spectroscopy", C. Yao, S. Gao, Y. Wang, P. Wang, W. Jin, and W. Ren*, Journal of Lightwave Technology, 38(7), 2067-2072 (2020). (link)

11. "MHz-rate scanned-wavelength direct absorption spectroscopy using a distributed feedback diode laser at 2.3 µm", M. Raza, L. Ma, C. Yao, M. Yang, Z. Wang, Q. Wang, R. Kan, and W. Ren*, Optics and Laser Technology, 130, 106344 (2020). (link)

12. "MIR-pump NIR-probe fiber-optic photothermal spectroscopy with background-free first harmonic detection", C. Yao, S. Gao, Y. Wang, P. Wang, W. Jin, and W. Ren*, IEEE Sensors Journal, 20(21), 12709 (2020). (link)

13. "Theoretical and experimental study of heterodyne phase-sensitive dispersion spectroscopy with an injection-current-modulated quantum cascade laser", Z. Wang, K.-P. Cheong, M. Li, Q. Wang, and W. Ren*, Sensors, 20(21), 6176 (2020). (link)

2019

1. "Cascaded group-additivity ONIOM: A new method to approach CCSD(T)/CBS energies of large aliphatic hydrocarbons", J. Wu, H. Ning, L. Ma, P. Zhang, and W. Ren*, Combustion and Flame, 201, 31-43 (2019). (link)

2. "Mid-infrared heterodyne phase-sensitive dispersion spectroscopy in flame measurements", L. Ma, Z. Wang, K.-P. Cheong, H. Ning, and W. Ren*, Proceedings of the Combustion Institute, 37(2), 1329-1336 (2019). (link)

3. "Stability and emission characteristics of nonpremixed MILD combustion from a parallel-jet burner in a cylindrical furnace", K.-P. Cheong, G. Wang, B. Wang, R. Zhu, W. Ren, J. Mi*, Energy, 170, 1181-1190 (2019). (link

4. "TDLAS Monitoring of Carbon Dioxide with Temperature Compensation in Power Plant Exhausts", X. Zhu, S. Yao*, W. Ren, Z. Lu, and Z. Li, Applied Sciences, 9(3), 442 (2019). (link)

5. "Ultra-sensitive photoacoustic detection in a high-finesse cavity with Pound-Drever-Hall locking", Z. Wang, Q. Wang, W. Zhang, H. Wei, Y. Li, and W. Ren*, Optics Letters, 44(8), 1924-1927 (2019). (link)

6. "Accurate entropy calculation for large flexible hydrocarbons using a multi-structural 2-dimensional torsion method", J. Wu, H. Ning, X. Xu, and W. Ren*, Physical Chemistry Chemical Physics, 21, 10003-10010 (2019). (link)

7. "Kinetic mechanism for modeling the temperature effect on PAH formation in the pyrolysis of acetylene", H. Tao, H.-Y. Wang, W. Ren, and K. C. Lin*, Fuel, 255, 115796 (2019). (link)

8. "Photothermal CO detection in a hollow-core negative curvature fiber", C. Yao, Q. Wang, Y. Lin, W. Jin, L. Xiao, S. Gao, Y. Wang, P. Wang, and W. Ren*, Optics Letters, 44(16), 4048-4051 (2019). (link)

9. "Time-resolved characterization of non-thermal plasma-assisted photocatalytic removal of nitric oxide", M. Yang, K. Liu, L. Ma, K.-P. Cheong, Z. Wang, W. Ho, and W. Ren*, Journal of Physics D, 53(1), 01LT02 (2019). (link)

2018

1. "Characterization of temperature and soot volume fraction in laminar premixed flames: laser absorption/extinction measurement and 2D CFD modeling", L. Ma, H. Ning, J. Wu, K.-P. Cheong, and W. Ren*, Energy & Fuels, 32(12), 12962-12970 (2018). (link)

2. "Influence of line pair selection on flame tomography using infrared absorption spectroscopy", K.-P. Cheong, L. Ma, Z. Wang, and W. Ren*, Applied Spectroscopy, 73(5), 529-539 (2018). (link)

3. (HOT Articles)"Pressure-dependent kinetics of methyl formate reaction with OH at combustion, atmospheric and interstellar temperatures", J. Wu, H. Ning, L. Ma, and W. Ren*, Physical Chemistry Chemical Physics, 20(41), 26190-26199 (2018). (link

4. "Interband cascade laser absorption sensor for real-time monitoring of formaldehyde filtration by a nanofiber membrane", C. Yao, Z. Wang, Q. Wang, Y. Bian, C. Chen, L. Zhang, and W. Ren*, Applied Optics, 57(27), 8005-8010 (2018). (link)

5. (Invited review) "Recent Advances of Power-Enhanced Photoacoustic Spectroscopy for Gas Sensing", Q. Wang, K. Xu, C. Yao, Z. Wang, J. Chang, and W. Ren*, 中国激光, 45(9), 911008 (2018). (link)

6. “Premixed MILD Combustion of Propane in a Cylindrical Furnace with a Single Jet Burner: Combustion and Emission Characteristics”, KP Cheong, G Wang, J Mi, B Wang, R Zhu, W Ren, Energy & Fuels, 32 (8), 8817–8829 (2018). (link)

7. "Standoff detection of VOCs using external cavity quantum cascade laser spectroscopy", N. Liu, S. Zhou, L. Zhang, B. Yu, H. Fischer, W. Ren, J. Li,  Laser Physics Letters, 15 (2018). (link)

8. "Metal-Organic Framework-Based Nanofiber Filters for Effective Indoor Air Quality Control", Y. Bian, R. Wang, S. Wang, C. Yao, W. Ren, C. Chen, L. Zhang, Journal of Materials Chemistry A, 6, 15807-15814 (2018). (link)

9. "A theoretical and shock tube kinetic study on hydrogen abstraction from phenyl formate", H. Ning, D. Liu, J. Wu, L. Ma, W. Ren*, and A. Farooq, Physical Chemistry Chemical Physics, 20, 21280-21285 (2018). (link)

10. "Temperature and H2O sensing in laminar premixed flames using mid-infrared heterodyne phase-sensitive dispersion spectroscopy", L. Ma, Z. Wang, K.-P. Cheong, H. Ning, and W. Ren*, Applied Physics B, 124:117 (2018). (link)

11. "Fiber-ring laser intracavity QEPAS gas sensor using a 7.2 kHz quartz tuning fork", Q. Wang, Z. Wang, W. Ren*, P. Patimisco, A. Sampaolo, and V. Spagnolo, Sensors and Actuators B, 268, 512-518 (2018).(link)

12. "Accurate Prediction of Bond Dissociation Energies of Large n-Alkanes Using ONIOM-CCSD(T)/CBS Methods", J. Wu, H. Ning, L. Ma, W. Ren*, Chemical Physics Letters, 699, 139-145 (2018). (link)

13. "In situ flame temperature measurements using a mid-infrared two-line H2O laser-absorption thermometry", L. Ma, H. Ning, J. Wu, and W. Ren*, Combustion Science and Technology, 190(3), 392-407 (2018). (link)

2017

1. "A mid-infrared fiber-coupled QEPAS nitric oxide sensor for real-time engine exhaust monitoring", C. Shi, D. Wang, Z. Wang, L. Ma, Q. Wang, K. Xu, S.-C. Chen, and W. Ren*, IEEE Sensors Journal, 17(22), 7418-7424 (2017). (link)

2. "Mid-infrared fiber-optic photothermal interferometry", Z. Li, Z. Wang, F. Yang, W. Jin, and W. Ren*, Optics Letters, 42(18), 3718-3721 (2017). (link)

3. "Theoretical and experimental investigation of fiber-ring laser intracavity photoacoustic spectroscopy (FLI-PAS) for acetylene detection", Q. Wang, Z. Wang, and W. Ren*, Journal of Lightwave Technology, 35(20), 4519-4525 (2017). (link)

4. "Combined Ab Initio, Kinetic Modeling and Shock Tube Study of the Thermal Decomposition of Ethyl Formate", H. Ning, J. Wu, L. Ma, W. Ren*, D. F. Davidson, and R. K. Hanson, The Journal of Physical Chemistry A, 121(35), 6568-6579 (2017). (link)

5. "Theoretical and Shock Tube Study of the Rate Constants for Hydrogen Abstraction Reactions of Ethyl Formate", J. Wu, F. Khaled, H. Ning, L. Ma, A. Farooq, and W. Ren*, The Journal of Physical Chemistry A, 121(33), 6304-6313 (2017). (link)

6. "Chemical kinetic modeling and shock tube study of methyl propanoate decomposition", H. Ning, J. Wu, L. Ma, W. Ren*, D. F. Davidson, and R. K. Hanson, Combustion and Flame, 184, 30-40 (2017). (link)

7. "Mercury Telluride Quantum Dot Based Phototransistor Enabling High Sensitivity Room Temperature Photodetection at 2000 Nanometers", M. Chen, H. Lu, N.M. Abdelazim, Y. Zhu, Z. Wang, W. Ren, S.V. Kershaw*, A.L. Rogach, and N. Zhao*, ACS Nano, 11(6), 5614-5622 (2017). (link)

8. "Fiber ring laser-based intracavity photoacoustic spectroscopy for trace gas sensing", Q. Wang, Z. Wang, J. Chang, and W. Ren*, Optics Letters, 42(11), 2114-2117 (2017). (link)

9. "Wavelength-stabilization-based photoacoustic spectroscopy for methane detection", Q. Wang, Z. Wang, and W. Ren*, Measurement Science and Technology, 28(6), (2017). (link)

10. "Improved evanescent-wave quartz-enhanced photoacoustic CO sensor using an optical fiber taper", Z. Li, Z. Wang, Y. Qi, W. Jin, and W. Ren*, Sensors and Actuators B, 248, 1023-1028 (2017). (link)

11. "A portable low-power QEPAS-based CO2 isotope sensor using a fiber-coupled interband cascade laser", Z. Wang, Q. Wang, J. Y.-L. Ching, J. C.-Y. Wu, G. Zhang, and W. Ren*, Sensors and Actuators B, 246, 710-715 (2017). (link)

12. "Non-uniform temperature and species concentration measurements in a laminar flame using multi-band infrared absorption spectroscopy", L. Ma, L. Y. Lau, and W. Ren*, Applied Physics B, 123:83 (2017). (link)

13. "Quartz-Enhanced Photoacoustic Spectroscopy (QEPAS) detection of the v7 band of ethylene at low pressure with CO2 interference analysis", Z. Wang, J. Geng, and W. Ren*, Applied Spectroscopy, 71(8), 1834-1841 (2017). (link)

14. "Pyrolysis and oxidation of methyl acetate in a shock tube: a multi-species time-history study", W. Ren*, K.-Y. Lam, D. F. Davidson, R. K. Hanson, and X. Yang, Proceedings of the Combustion Institute, 36(1), 255-264 (2017). (link)

2016 

1. "Mid-infrared multimode fiber coupled quantum cascade laser for off-beam quartz-enhanced photoacoustic detection", Z. Li, C. Shi, and W. Ren*, Optics Letters, 41 (17), 4095-4098 (2016). (link)

2. "Optical fiber tip-based quartz-enhanced photoacoustic sensor for trace gas detection", Z. Li, Z. Wang, C. Wang, and W. Ren*, Applied Physics B, 122 (2016). (link)

3. "Quartz-enhanced photoacoustic detection of ethylene using a 10.5 μm quantum cascade laser", Z. Wang, Z. Li, and W. Ren*, Optics Express, 24, 4143-4154 (2016). (link)

2015

1. "Sensitive detection of formaldehyde using an interband cascade laser near 3.6 μm", W. Ren*, L. Luo, F. K. Tittel, Sensors and Actuators B, 221, 1062-1068 (2015). (link)