| Calibration-free WMS using a cw-DFB-QCL, a VCSEL, and an edge-emitting DFB laser with in-situ real-time laser parameter characterization A Upadhyay, D Wilson, M Lengden, AL Chakraborty, G Stewart, ... IEEE Photonics Journal 9 (2), 1-17, 2017 | 37 | 2017 |
| Calibration-free 2f WMS with in situ real-time laser characterization and 2f RAM nulling A Upadhyay, AL Chakraborty Optics Letters 40 (17), 4086-4089, 2015 | 37 | 2015 |
| A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f A Upadhyay, M Lengden, D Wilson, G Humphries, A Crayford, D Pugh, ... IEEE Photonics Journal, 2018 | 23 | 2018 |
| Residual amplitude modulation method implemented at the phase quadrature frequency of a 1650-nm laser diode for line shape recovery of methane A Upadhyay, AL Chakraborty IEEE Sensors Journal 15 (2), 1153-1160, 2014 | 22 | 2014 |
| Tomographic imaging of carbon dioxide in the exhaust plume of large commercial aero-engines A Upadhyay, M Lengden, G Enemali, G Stewart, W Johnstone, D Wilson, ... Applied optics 61 (28), 8540-8552, 2022 | 18 | 2022 |
| Measurement of atmospheric carbon dioxide and water vapor in built-up urban areas in the Gandhinagar-Ahmedabad region in India using a portable tunable diode laser spectroscopy … A Roy, NK Sharma, AL Chakraborty, A Upadhyay Applied optics 56 (31), H57-H66, 2017 | 14 | 2017 |
| Absolute noninvasive measurement of CO2 mole fraction emitted by E. coli and S. aureus using calibration-free 2f WMS applied to a 2004 nm VCSEL AS Zarin, AL Chakraborty, A Upadhyay Optics Letters 42 (11), 2138-2141, 2017 | 6 | 2017 |
| A Raspberry Pi-based field-deployable tunable diode laser spectroscopy system for the detection of CO2 at 2003.5 nm V Gandhi, S Heda, R Anand, AS Zarin, A Upadhyay, AL Chakraborty 2015 International Conference on Microwave and Photonics (ICMAP), 1-2, 2015 | 4 | 2015 |
| A fast sensor for non-intrusive measurement of concentration and temperature in turbine exhaust R Zhang, J Xia, I Ahmed, A Gough, I Armstrong, A Upadhyay, Y Fu, ... Sensors and Actuators B: Chemical 396, 134500, 2023 | 3 | 2023 |
| Convolutional neural network aided chemical species tomography for dynamic temperature imaging Y Fu, R Zhang, G Enemali, A Upadhyay, M Lengden, C Liu 2022 IEEE International Instrumentation and Measurement Technology …, 2022 | 2 | 2022 |
| Recent progress in the development of a chemical species tomographic imaging system to measure carbon dioxide emissions from large-scale commercial aero-engines M Lengden, G Stewart, W Johnstone, A Upadhyay, D Wilson, ... Optics and Photonics for Sensing the Environment, JM2F. 3, 2020 | 2 | 2020 |
| High-sensitivity remote detection of atmospheric pollutants and greenhouse gases at low ppm levels using near-infrared tunable diode lasers A Roy, A Upadhyay, AL Chakraborty Remote Sensing of the Atmosphere, Clouds, and Precipitation VI 9876, 305-311, 2016 | 2 | 2016 |
| Demonstration of calibration-free WMS measurement of gas parameters with in-situ real-time characterization of laser parameters using cw-DFB-QCL, VCSEL and DFB lasers A Upadhyay, D Wilson, M Lengden, AL Chakraborty, G Stewart, ... | 2 | 2016 |
| Tunable diode laser spectroscopy with electronically controlled background RAM nulling A Upadhyay, VV Katre, AL Chakraborty OFS2012 22nd International Conference on Optical Fiber Sensors 8421, 1028-1031, 2012 | 2 | 2012 |
| Hybrid model-driven spectroscopic network for rapid retrieval of turbine exhaust temperature Y Fu, R Zhang, J Xia, A Gough, S Clark, A Upadhyay, G Enemali, ... IEEE Transactions on Instrumentation and Measurement, 2023 | 1 | 2023 |
| Detecting metabolic carbon dioxide using a tunable laser for non-invasive monitoring of growth of bacterial pathogens AS Zarin, AL Chakraborty, A Upadhyay The European Conference on Lasers and Electro-Optics, CL_4_6, 2017 | 1 | 2017 |
| Detection of methane at 1650nm and carbon dioxide at 2004nm using tunable diode laser spectroscopy A Upadhyay, AL Chakraborty 2012 International Conference on Fiber Optics and Photonics (PHOTONICS), 1-3, 2012 | 1 | 2012 |
| Open-path CO2 measurement in indoor and outdoor environments in the Ahmedabad-Gandhinagar area using a 2004 nm tunable VCSEL A Roy, A Upadhyay, AL Chakraborty International Conference on Fibre Optics and Photonics, W4G. 2, 2016 | | 2016 |
| Accurate recovery of a methane absorption line using the residual amplitude modulation method implemented at the phase quadrature frequency of a laser diode A Upadhyay, AL Chakraborty | | 2014 |
| Optimization of calibration-free wavelength modulation spectroscopy technique for gas parameter measurement A Upadhyay, AL Chakraborty | | 2014 |
