| Citation | Through his outstanding experimental and analytical skills, David Hanna has made a considerable contribution to the understanding of laser physics and the control of laser devices. He has applied a thorough, quantitative treatment to many important topics (eg. relaxation oscillations, resonators, mode selection, nonlinear optics, parametric oscillators, waveguide lasers) which were previously inadequately understood. His present research on fibre lasers, visible up-conversion lasers and ion-implanted crystal waveguides, leads the world and he has created a new generation of lasers which are compact, stable, highly efficient and capable of operating at new wavelengths. |