| 3D-printed miniature gas cell for photoacoustic spectroscopy of trace gases R Bauer, G Stewart, W Johnstone, E Boyd, M Lengden Optics letters 39 (16), 4796-4799, 2014 | 78 | 2014 |
| Elimination of residual amplitude modulation in tunable diode laser wavelength modulation spectroscopy using an optical fiber delay line AL Chakraborty, K Ruxton, W Johnstone, M Lengden, K Duffin Optics express 17 (12), 9602-9607, 2009 | 68 | 2009 |
| Recovery of absolute gas absorption line shapes using tunable diode laser spectroscopy with wavelength modulation—part 2: experimental investigation JRP Bain, W Johnstone, K Ruxton, G Stewart, M Lengden, K Duffin Journal of Lightwave Technology 29 (7), 987-996, 2011 | 62 | 2011 |
| Tunable diode laser spectroscopy with wavelength modulation: Elimination of residual amplitude modulation in a phasor decomposition approach K Ruxton, AL Chakraborty, W Johnstone, M Lengden, G Stewart, K Duffin Sensors and Actuators B: Chemical 150 (1), 367-375, 2010 | 55 | 2010 |
| A Custom, High-Channel Count Data Acquisition System for Chemical Species Tomography of Aero-Jet Engine Exhaust Plumes EMD Fisher, SA Tsekenis, Y Yang, A Chighine, C Liu, N Polydorides, ... IEEE Transactions on Instrumentation and Measurement 69 (2), 549-558, 2019 | 41 | 2019 |
| 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 |
| Miniaturized Photoacoustic Trace Gas Sensing using a Raman Fiber Amplifier R Bauer, T Legg, D Mitchell, GMH Flockhart, G Stewart, W Johnstone, ... Journal of Lightwave Technology 33 (18), 3773-3780, 2015 | 35 | 2015 |
| Towards in-cylinder chemical species tomography on large-bore IC engines with pre-chamber SA Tsekenis, D Wilson, M Lengden, J Hyvönen, J Leinonen, A Shah, ... Flow Measurement and Instrumentation 53, 116-125, 2017 | 28 | 2017 |
| Constrained models for optical absorption tomography N Polydorides, A Tsekenis, E Fisher, A Chighine, H McCann, L Dimiccoli, ... Applied Optics 57 (7), B1-B9, 2018 | 24 | 2018 |
| Measurement of CO2 Concentration and Temperature in an Aero Engine Exhaust Plume Using Wavelength Modulation Spectroscopy T Benoy, D Wilson, M Lengden, I Armstrong, G Stewart, W Johnstone IEEE Sensors Journal 17 (19), 6409-6417, 2017 | 24 | 2017 |
| 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, GS Humphries, A Crayford, D Pugh, ... IEEE Photonics Journal, 2018 | 23 | 2018 |
| Progress towards non-intrusive optical measurement of gas turbine exhaust species distributions P Wright, D McCormick, K Ozanyan, M Johnson, J Black, E Fisher, ... 2015 IEEE Aerospace Conference, 1-14, 2015 | 23 | 2015 |
| Detection of CH in the Mid-IR Using Difference Frequency Generation With Tunable Diode Laser Spectroscopy I Armstrong, W Johnstone, K Duffin, M Lengden, AL Chakraborty, ... Journal of Lightwave Technology 28 (10), 1435-1442, 2010 | 21 | 2010 |
| 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 |
| Implementation of Non-Intrusive Jet Exhaust Species Distribution Measurements Within a Test Facility P Wright, D McCormick, J Kliment, K Ozanyan, S Tsekenis, E Fisher, ... Aerospace Conference, 2016 IEEE, 2016 | 18 | 2016 |
| An FPGA-based lock-in detection system to enable Chemical Species Tomography using TDLAS A Chighine, E Fisher, D Wilson, M Lengden, W Johnstone, H McCann 2015 IEEE International Conference on Imaging Systems and Techniques (IST), 1-5, 2015 | 17 | 2015 |
| A simple photoacoustic method for the in situ study of soot distribution in flames GS Humphries, J Dunn, MM Hossain, M Lengden, IS Burns, JD Black Applied Physics B 119, 709-715, 2015 | 15 | 2015 |
| Tunable Diode Laser Based Concentration Measurements of Water Vapour and Methane on a Solid Oxide Fuel Cell M Lengden, R Cunningham, W Johnstone Journal of Lightwave Technology 31 (9), 1354-1359, 2013 | 15 | 2013 |
| Recovery of Absolute Absorption Line Shapes in Tunable Diode Laser Spectroscopy using External Amplitude Modulation with Balanced Detection J Bain, M Lengden, G Stewart, W Johnstone IEEE Sensors Journal 16 (3), 675-680, 2016 | 12 | 2016 |
| TDLAS using FPGA-based lock-in detection for multi-channel Chemical Species Tomography A Chighine, SA Tsekenis, E Fisher, N Polydorides, D Wilson, M Lengden, ... SENSORS, 2015 IEEE, 1-4, 2015 | 12 | 2015 |
Walter JohnstoneProfessor of Engineering, Strathclyde UniversityVerified email at strath.ac.uk
