Dr Michael Lengden


Electronic and Electrical Engineering

Personal statement

Michael Lengden was awarded an M.Phys. degree in physics from the University of Manchester, where he also received the Ph.D. in 2006 for his work on stepwise excitation of atomic and molecular metastable states. 

After spending a year as an applications engineer for Laboratory Impex Systems LTD he joined the Centre for Microsystems and Photonics at the University of Strathclyde as a Research Fellow working on high temperature, high pressure gas composition measurements using tunable diode laser spectroscopy.  In 2010 hw was appointed as a lecturer within the EEE department and is currently applying new techniques in tunable diode laser spectroscopy for concentration and pressure measurements in harsh environments, such as solid oxide fuel cells and aeroengines.


Tomographic imaging of carbon dioxide in the exhaust plume of large commercial aero-engines
Upadhyay Abhishek, Lengden Michael, Enemali Godwin, Stewart George, Johnstone Walter, Wilson David, Humphries Gordon, Benoy Thomas, Black John, Chighine Andrea, Fisher Edward, Zhang Rui, Liu Chang, Polydorides Nick, Tsekenis Alex, Wright Paul, Kliment Joshua, Nilsson Johan, Feng Yutong, Archilla Victor, Rodriguez-Carmona Javier, Sanchez-Valdepenas Jesus, Beltran Marta, Polo Valentin, Armstrong Ian, Mauchline Iain, Walsh Douglas, Johnson Mark, Bauldreay Joanna, McCann Hugh
Applied Optics Vol 61, pp. 8540-8552 (2022)
Measurement of acetylene concentration in laminar flat flames by diode laser cavity ring-down spectroscopy
Otti P, Humphries GS, Hu Y, Lengden M, Burns IS
Applied Physics B: Lasers and Optics Vol 128 (2022)
A calibration-free methodology for resonantly enhanced photoacoustic spectroscopy using quantum cascade lasers
Ilke Metin, Bauer Ralf, Lengden Michael
IEEE Sensors Journal Vol 20, pp. 10530-10538 (2020)
A custom, high-channel-count data acquisition system for chemical species tomography of aero-jet engine exhaust plumes
Fisher Edward M D, Tsekenis Stylianos-Alexios, Yang Yunjie, Chighine A, Liu Cheng, Polydorides Nick, Wright P, Kliment J, Ozanyan K, Benoy Thomas, Humphries Gordon, Wilson David, Lengden M, Johnstone Walter, McCann Hugh
IEEE Transactions on Instrumentation and Measurement Vol 69, pp. 549-558 (2020)
Performance analysis of a novel pyroelectric device for non-dispersive infra-red CO2 detection
Wilson David, Phair John W, Lengden Michael
IEEE Sensors Journal Vol 19, pp. 6006-6011 (2019)
In-situ photoacoustic measurement of soot profiles in laminar flames using a high repetition-rate pulsed fibre laser
Humphries Gordon S, Roy Robert, Black John D, Lengden Michael, Burns Iain S
Applied Physics B: Lasers and Optics Vol 125 (2019)

More publications


I teach a number of course related to electronics, fundamental physics and optical systems.  I also supervise 3rd year, 4th year and Masters projects based on the development of optical fibre sensors.  My teaching is as follows

  • EE107 Electronic and Electrical Principles (Tutor)
  • 19207 - Electromagnetism (Lecturer)
  • EE473 - Photonic Systems (Lecturer)
  • EE986 - MSc Professional Studies (Tutor)
  • EE979 - Photonics Centre for Doctoral Training (Lecturer and Project Supervisor)
  • 19.496 - 4th Year Undergraduate Individual Projects (Supervisor)
  • 19.900 - MSc Individual Project (Supervisor)

Research interests

My current research interests lie in the application of tunable diode laser spectroscopy (TDLS) for gas sensing applications in industrial process control and harsh environments.  I also work on fundamental spectroscopic measurements of gas species at high temperatures.  I am a PI on an EPSRC First Grant looking at the use of 3D printing for photoacoustic measurements of methane, acetylene and SOx.  I am also a CI on a collaborative EPSRC grant with the Universities of Manchester and Southampton, Rolls-Royce and Shell.  My main focus on this project is the development of TDLS techniques to measure a 2D tomographic distribution of carbon dioxide from aero engine exhausts.

Professional activities

Institute of Physics
Visiting lecturer
Optics Letters (Journal)
Peer reviewer
Technology Strategy Board Funding - Consultancy on 'Compact, Remotely Operated TDLS System for Fuel Cell Diagnostics'
Photonex 10
Invited speaker
Assisting Rolls-Royce Fuel Cell Systems LTD with research in fuel cell technology and commercialisation.

More professional activities


Digital Dairy Value-Chain for South-West Scotland and Cumbria (Strength in Places Fund)
Michie, Craig (Principal Investigator) Andonovic, Ivan (Co-investigator) Atkinson, Robert (Co-investigator) Bellekens, Xavier (Co-investigator) Galloway, Stuart (Co-investigator) Kelly, Nicolas (Co-investigator) Lengden, Michael (Co-investigator) Revie, Matthew (Co-investigator) Stewart, Robert (Co-investigator) Tachtatzis, Christos (Co-investigator) Ward, Andrew (Co-investigator)
01-Jan-2022 - 31-Jan-2027
Industrial CASE Account - University of Strathclyde 2021 | Clark, Stuart
Lengden, Michael (Principal Investigator) Johnstone, Walter (Co-investigator) Clark, Stuart (Research Co-investigator)
01-Jan-2021 - 01-Jan-2025
Laser Imaging of Turbine Engine Combusion Species (LITECS) (Programme Grant)
Johnstone, Walter (Principal Investigator) Burns, Iain (Co-investigator) Lengden, Michael (Co-investigator)
01-Jan-2020 - 31-Jan-2024
Diode-pumped Ti:sapphire Lasers: A Manufacturable Platform for Precision Photonics
Kemp, Alan (Principal Investigator) Hastie, Jennifer (Co-investigator) Lengden, Michael (Co-investigator) Savitski, Vasili (Research Co-investigator)
01-Jan-2020 - 31-Jan-2023
Multi-Path PAS
Lengden, Michael (Principal Investigator)
21-Jan-2019 - 20-Jan-2019
Advanced Gas Sensing Approaches for Ruminant Livestock Monitoring
Lengden, Michael (Principal Investigator) Michie, Craig (Co-investigator)
01-Jan-2018 - 31-Jan-2022

More projects


Electronic and Electrical Engineering
Royal College

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