Imperial College London


Faculty of Natural SciencesDepartment of Physics

Academic Visitor







Blackett LaboratorySouth Kensington Campus





I am a Postdoctoral Research Associate in the Photonics Group, Department of Physics. I came to Imperial College in 2003, undertaking undergraduate (BSc Physics) and postgraduate (MSc Optics and Photonics) studies, before completing a PhD in Laser Physics and Nonlinear Optics in 2011 supervised by Prof Mike Damzen. During my PhD I developed high average power pulsed (modelocked and Q-switched) diode-pumped solid-state lasers, largely based on Nd-doped gain media operating at 1μm and 1.3μm.

Post-PhD, I was awarded an EPSRC Knowledge Transfer Secondment where I spent a year working for an Imperial spin-out company, Midaz Lasers. Immediately following this, I was awarded a Doctoral Prize Fellowship at Imperial to develop diode-pumped Alexandrite lasers and amplifiers. Since 2012 I have been Work Package Leader for a European Space Agency funded project: "Diode-pumped Alexandrite Lasers for Remote Sensing", and am responsible for the management and day-to-day running of the technical tasks of the project.

If you'd like to hear a brief, accessible explanation about my most recent work, you can watch this (slightly embarasssing) video and this (even more embarassing) video from this year's World Economic Forum Annual Meeting of the New Champions.

In 2016, I became one of the World Economic Forum's Young Scientists, an honour that acknowledges and "brings together the most forward-thinking and advanced young scientific minds in the world". Every year, WEF honours a small number of scientists under the age of 40, who are advancing the frontiers of science, whilst demonstrating commitment to public service.



Damzen MJ, Thomas GM, Minassian A, 2017, Diode-side-pumped Alexandrite slab lasers, Optics Express, Vol:25, ISSN:1094-4087, Pages:11622-11636

Parali U, Sheng X, Minassian A, et al., 2017, Diode-pumped Alexandrite laser with passive SESAM Q-switching and wavelength tunability, Optics Communications, ISSN:0030-4018


Thomas GM, Next generation space and airborne laser technology - plenary‌, SpaceLab 2015

Thomas GM, Damzen MJ, Next generation space and airborne laser technology - plenary‌, SpaceLab 2015

Thomas GM, Teppitaksak A, Minassian A, et al., Progress in diode-pumped Alexandrite lasers as a new resource for future space Lidar missions, International Conference on Space Optics

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