University Court of the University of St. Andrews

M Squared Lasers Limited

Cameron F. Rae

Malcolm H. Dunn

Tom, J. Edwards

David Walsh

David J., M. Stothard

David Alan Walsh

Malcolm Harry Dunn

Cameron Francis Rae

Tom J Edwards

David J M Stothard

David James Mark Stothard

Malcolm H Dunn

Cameron F Rae

David Jm Stothard

M Stothard David J

J Edwards Tom

David JM Stothard

An optical parametric device comprising a slant-stripe periodically poled nonlinear material that is operable to generate signal in response to interaction with a pump wave, the non-linear interaction being such that the pump and idler waves are collinear and the signal wave is non-collinear relative to the pump and idler waves, wherein the slant-stripe non-linear material is able to generate two idler waves and two signal waves, and the device is adapted to allow for the selection and output coupling of a required one of the two signal waves.

Optical parametric generator based on a slant-stripe periodically poled nonlinear material with optimized lateral output coupling of a terahertz signal

A method of optimizing parametric gain in a nonlinear optical crystal that in response to application of a pump beam generates through a parametric generation process signal and idler beams, wherein the signal beam is non-collinear with the pump beam and the signal beam is subject to absorption due to the nonlinear material, the method involving shaping the pump beam to have an elliptical cross section, wherein the method further involves determining the width w of the pump beam depending on the absorption co-efficient of the optical crystal.

Parametric generator

A parametric device having a non-linear material () for generating an idler wave and a signal wave () in response to a pump wave (), the pump, idler and signal waves being non-collinear, the device having a cavity () resonant at the pump wavelength and means for varying the angle between the propagation directions of the pump and idler waves.

Parametric generation using intersecting cavities

A coating between a nonlinear crystal and a silicon prism coupler, prevents transmission of radiation scattered within the crystal by filtering out frequencies outside the silicon bandgap to avoid free carrier absorption, but transmits THz frequencies that correspond to the bandgap.

Coating for optimising output coupling of em radiation

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Fife, United Kingdom

David Alan Walsh