Projects per year
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.
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.
The Photonic Systems Research team works closely with industry and currently collaborate in the area of spectroscopic gas measurements with Rolls-Royce, Rolls-Royce Fuels Cell Systems, Shell, OptoSci Ltd. and M Squared Lasers, working on advances in gas measurement technologies for harsh, high temperature environments, such as gas turbine (aero) engines and fuel cells.
Expertise & Capabilities
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.
Fundamental principles of Optics and Photonics, optical telecommunication systems, photonics systems and its applications in general.
Academic / Professional qualifications
PhD, BSc (Hons), FIET, CEng, F.Inst.P, CPhys
1/10/18 → 1/04/22
Project: Research Studentship - Internally Allocated › Research Studentship (Internally Allocated)
1/03/18 → 31/08/20
Research Output per year
A new RAM normalized 1f-WMS technique for the measurement of gas parameters in harsh environments and a comparison with 2f/1fUpadhyay, A., Lengden, M., Wilson, D., Humphries, G. S., Crayford, A. P., Pugh, D., Johnson, M. P., Stewart, G. & Johnstone, W., 21 Nov 2018, (Accepted/In press) In : IEEE Photonics Journal.
Research output: Contribution to journal › Article
Research output: Contribution to conference › Paper
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
Lengden, M. (Creator), University of Strathclyde, 17 Jun 2016
Measurement of CO2 Concentration and Temperature in an Aero Engine Exhaust Plume Using Wavelength Modulation Spectroscopy
Wilson, D. (Creator), University of Strathclyde, 27 Jun 2017
Student thesis: Doctoral Thesis
Student thesis: Doctoral Thesis
Activities per year
Activity: Publication peer-review and editorial work › Editorial board member
Activity: Membership › Membership of committee