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Prof Walter Johnstone

Electronic and Electrical Engineering

Personal statement

Prof. Walter Johnstone is the Research Professor of Photonic Systems in the Department of Electronic and Electrical Engineering with responsibility only for research leadership and implementation. Prior to his current status, he held senior management positions as Deputy Head then Head of Electronic and Electrical Engineering (2006-11) followed by appointment to the post of Vice Dean (Research) of the Faculty of Engineering (2011-16). He is also a founding director of the Spin-out Company, OptoSci Ltd.

Expertise

Has expertise in:

    Laser spectroscopy, in particular tunable diode laser spectroscopy, and its applications to accurate measurements of gas concentration, temperature and pressure in harsh, particularly high temperature, envoronments such as fuels cells and gas turbine (aero) engines at temperatures up to 1000oC.

Publications

Constrained models for optical absorption tomography
Polydorides Nick , Tsekenis Alex, Fisher Edward, Chigine Andrea, McCann Hugh, Dimiccoli Luca, Wright Paul, Lengden Michael, Benoy Thomas, Wilson David, Humphries Gordon, Johnstone Walter
Applied Optics Vol 57, pp. B1-B9, (2017)
http://dx.doi.org/10.1364/AO.57.0000B1
Measurement of CO2 concentration and temperature in an aero engine exhaust plume using wavelength modulation spectroscopy
Benoy Thomas, Wilson David, Lengden Michael, Armstrong Ian, Stewart George, Johnstone Walter
IEEE Sensors Journal Vol 17, pp. 6409-6417, (2017)
http://dx.doi.org/10.1109/JSEN.2017.2738333
Calibration-free WMS using a cw-DFB-QCL, a VCSEL, and an edge-emitting DFB laser with in-situ real-time laser parameter characterization
Upadhyay Abhishek, Wilson David, Lengden Michael, Chakraborty Arup L., Stewart George, Johnstone Walter
IEEE Photonics Journal Vol 9, (2017)
http://dx.doi.org/10.1109/JPHOT.2017.2655141
Trace gas sensing using DFB laser and QCL with miniaturized 3D-printed photoacoustic gas cells
Bauer Ralf, Flockhart Gordon M. H., Johnstone Walter, Lengden Michael
International Conference on Fibre Optics and Photonics 2016, (2016)
http://dx.doi.org/10.1364/PHOTONICS.2016.W4G.3
Working towards cleaner air travel : the technology behind the FLITES project
Wilson David, Humphries Gordon Samuel, Benoy Thomas, Lengden Michael, Johnstone Walter, Tsekenis Alex, Fisher Edward, Chigine Andrea, McCann Hugh , Feng Yutong, Nilsson Johan, Wright Paul, McCormick David, Ozanyan Krikor, Archilla Prat Victor , Johnson Mark, Black John
FLAIR 2016 - Field Laser Applications in Industry and Research, (2016)
Recovery of absorption line shapes with correction for the wavelength modulation characteristics of DFB lasers
Benoy Thomas, Lengden Michael, Stewart George, Johnstone Walter
IEEE Photonics Journal Vol 8, (2016)
http://dx.doi.org/10.1109/JPHOT.2016.2558504

more publications

Teaching

Fundamental principles of Optics and Photonics, optical telecommunication systems, photonics systems and its applications in general.

Research interests

Professor Johnstone is Head of the Photonic Systems research team and his work has led to more than 200 technical publications and several patent applications. Recent research in laser spectroscopy applications focusses on accurate measurement of gas concentration, pressure and temperature in extreme environments, such as in the combustion zones and exhaust plumes of aero (gas turbine) engines at high temperature and high gas velocity. As well as carrying out basic research, his group is involved in the engineering of such systems for in situ industrial deployment, and sensing systems based on his research are now commercially available.

Professional activities

Institute for System Level Integration (External organisation)
Member
5/2010
Journal of Measurement Science and Instrumentation (Journal)
Editorial board member
1/2010
Glasgow Research Partnership Joint Research Initiative on Electronics, Communications and Power Systems (External organisation)
Member
5/2009
Photonics 2008
Invited speaker
12/2008
Optosci Ltd (External organisation)
Member
1/10/1994

more professional activities

Projects

EngD Gooch and Housego Optical Coherence Tomography
Flockhart, Gordon (Principal Investigator) Johnstone, Walter (Co-investigator)
Period 01-Oct-2017 - 30-Sep-2021
In-situ Chemical Measurement and Imaging Diagnostics for Energy Process Engineering (Platform Grant)
Johnstone, Walter (Principal Investigator) Burns, Iain (Co-investigator) Lengden, Michael (Co-investigator) Stewart, George (Co-investigator)
Period 01-Oct-2016 - 30-Sep-2021
EPSRC Doctoral Training Grant - DTA, University of Strathclyde | Paterson, Alan
Uttamchandani, Deepak (Principal Investigator) Johnstone, Walter (Co-investigator) Paterson, Alan (Research Co-investigator)
Period 01-Oct-2013 - 01-Apr-2017
Fibre Laser Imaging For Gas Turbine Exhaust Species (FLITES) | Benoy, Thomas
Johnstone, Walter (Principal Investigator) Lengden, Michael (Co-investigator)
Period 01-Nov-2012 - 19-Jan-2017
Collaborative Training Account / RA3745
Johnstone, Walter (Principal Investigator)
Period 01-Jan-2004 - 30-Sep-2012
Collaborative Training Account / RA3489
Johnstone, Walter (Principal Investigator)
Period 01-Jan-2004 - 30-Sep-2012

more projects

Address

Electronic and Electrical Engineering
Royal College Building

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