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Otti, P. and Humphries, G.S. and Hu, Y. and Lengden, M. and Burns, I.S. (2022) Measurement of acetylene concentration in laminar flat flames by diode laser cavity ring-down spectroscopy. Applied Physics B: Lasers and Optics, 128 (9). 165. ISSN 0946-2171

Fisher, Edward M. D. and Tsekenis, Stylianos-Alexios and Yang, Yunjie and Chighine, A. and Liu, Cheng and Polydorides, Nick and Wright, P. and Kliment, J. and Ozanyan, K. and Benoy, Thomas and Humphries, Gordon and Wilson, David and Lengden, M. and Johnstone, Walter and McCann, Hugh (2020) A custom, high-channel-count data acquisition system for chemical species tomography of aero-jet engine exhaust plumes. IEEE Transactions on Instrumentation and Measurement, 69 (2). pp. 549-558. ISSN 0018-9456

Humphries, Gordon S. and Roy, Robert and Black, John D. and Lengden, Michael and Burns, Iain S. (2019) In-situ photoacoustic measurement of soot profiles in laminar flames using a high repetition-rate pulsed fibre laser. Applied Physics B: Lasers and Optics, 125 (4). 60. ISSN 0946-2171

Upadhyay, Abhishek and Lengden, Michael and Wilson, David and Humphries, Gordon Samuel and Crayford, Andrew P. and Pugh, Daniel G. and Johnson, Mark P. and Stewart, George and Johnstone, Walter (2018) A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1f. IEEE Photonics Journal, 10 (6). 6804611. ISSN 1943-0655

Zhang, Congzhe and Yang, Yuanhong and Lin, Yuechuan and Tan, Yanzhen and Lengden, Michael and Humphries, Gordon and Johnstone, Walter and Lut Ho, Hoi and Jin, Wei; (2018) All-optical fiber multi-point photoacoustic spectroscopic gas sensing system. In: Proceedings 26th International Conference on Optical Fiber Sensors. Optical Society of America, CHE. ISBN 9781943580507

Humphries, Gordon S. and Lengden, Michael (2018) Azimuthally excited resonators for photoacoustic spectroscopy. In: Field Laser Applications in Industry and Research (FLAIR) 2018, 2018-09-10 - 2018-09-14.

Humphries, Gordon S. and Bauer, Ralf and Lengden, Michael (2017) Performance of a azimuthally excited 3D-printed resonator for multi-pass spectroscopic applications. In: IEEE SENSORS 2017, 2017-10-29 - 2017-11-01, Scottish Exhibition and Conference Centre.

Polydorides, Nick and Tsekenis, Alex and Fisher, Edward and Chigine, Andrea and McCann, Hugh and Dimiccoli, Luca and Wright, Paul and Lengden, Michael and Benoy, Thomas and Wilson, David and Humphries, Gordon and Johnstone, Walter (2017) Constrained models for optical absorption tomography. Applied Optics, 57 (7). B1-B9. ISSN 1559-128X

Atiku, Farooq and Lea-Langton, Amanda and Bartle, Keith and Jones, Jenny and Williams, Alan and Burns, Iain and Humphries, Gordon Samuel (2017) Some aspects of the mechanism of formation of smoke from the combustion of wood. Energy and Fuels, 31 (2). pp. 1935-1944. ISSN 0887-0624

Wilson, David and Humphries, Gordon Samuel and Benoy, Thomas and Lengden, Michael and Johnstone, Walter and Tsekenis, Alex and Fisher, Edward and Chigine, Andrea and McCann, Hugh and Feng, Yutong and Nilsson, Johan and Wright, Paul and McCormick, David and Ozanyan, Krikor and Archilla Prat, Victor and Johnson, Mark and Black, John (2016) Working towards cleaner air travel : the technology behind the FLITES project. In: FLAIR 2016 - Field Laser Applications in Industry and Research, 2016-09-12 - 2016-09-16.

Humphries, Gordon S. and Burns, Iain S. and Lengden, Michael (2016) Application of continuous-wave cavity ring-down spectroscopy to laminar flames. IEEE Photonics Journal, 8 (1). 3900110. ISSN 1943-0655

Humphries, G. S. and Dunn, J. and Hossain, M. M. and Lengden, M. and Burns, I. S. and Black, J. D. (2015) A simple photoacoustic method for the in situ study of soot distribution in flames. Applied Physics B: Lasers and Optics, 119 (4). pp. 709-715. ISSN 0946-2171

Humphries, Gordon and Lengden, Michael and Burns, Iain and Black, John; (2015) Novel in-situ optical measurement techniques for combustion applications. In: Advanced Photonics 2015, OSA Technical Digest. Optical Society of America, USA. ISBN 978-1-55752-000-5

Humphries, Gordon Samuel and Burns, Iain and Lengden, Michael (2014) Development of a continuous-wave cavity ring down spectrometer for combustion diagnostics. In: FLAIR 2014 - Field Laser Applications in Industry and Research, 2014-05-05 - 2014-05-09.