Laser science & optical metrology

We develop laser-based techniques to determine the thermodynamic properties of, and the concentration of trace species in, challenging environments such as combusting gases. These techniques take advantage of both linear and non-linear optical phenomena, including laser-induced thermal grating spectroscopy (LITGS) and degenerate four-wave mixing (DFWM). For example, we have applied these techniques to measure temperature and species concentration in flames, and in future experiments we will measure the pre-ignition temperatures in a combustion engine.

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We also apply high-resolution laser spectroscopic techniques to studies of fundamental physics. For example, we are interested in fundamental symmetry violations - such as parity and time reversal non-conservation, and tests of Quantum Electrodynamics. This work involves the development and study of frequency-locked lasers and amplifiers, the application of high-precision spectroscopic techniques, and the development of new frequency standards.

Our work is undertaken in Oxford and at the Rutherford Appleton Laboratory. We collaborate with many research groups and institutions, including the physics, chemistry and engineering departments in Oxford, Cambridge, Stuttgart, Braga, and Novosibirsk.

Research groups in this theme

Combustion Physics and Non-Linear Optics

We develop laser-based diagnostic techniques, taking advantage of linear and non-linear optical phenomena - primarily in the gas phase.

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Symmetry violations, QED, laser spectroscopy

Photograph of the laser spectrometer that we have installed in the Rutherford Appleton Laboratory.

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