Imperial College London


Faculty of Natural SciencesDepartment of Physics

Senior Research Investigator



+44 (0)20 7594 Website CV




6M07Huxley BuildingSouth Kensington Campus






Geoff New has been at Imperial since 1973, and has been Professor of Nonlinear Optics since 1980.  From 1980 to 1992, he was head of the Laser Optics Group which became the Laser Optics & Spectroscopy Group in 1988; later, from 2001-2003, he was head of the Quantum Optics and Laser Science group.  He was Warden of Falmouth Keogh Hall from 1987 to 1996, and served as a staff representative on the College Council from 2001 to 2005. 

Geoff New was a Rank Prize Fund Fellow from 1975-1978, and became a Fellow of the Institute of Physics and a Fellow of the Optical Society of America in 1984.  He was Chairman of the Institute of Physics Quantum Electronics Group Committee from 1988-1991.  He was a member of the International Council of the Optical Society of America from 2005 - 2007. 

Geoff New’s research is centred on theoretical laser physics and nonlinear optics, with particular emphasis on the computer simulation of ultrafast processes. 


Geoff New was at Keble College Oxford as an undergraduate (1961-1964) and as a postgraduate (1964-1967).   For his DPhil, he worked with John Ward on the then-novel field of nonlinear optics.  Together, they measured a number of optical rectification coefficients, and went on to observe third harmonic generation in the gas phase for the first time.  In 1967, he joined Professor Dan Bradley’s thriving laser physics group at Queen’s University Belfast and, for the next six years, did experimental and theoretical work on ultrashort pulse generation in mode-locked lasers.  When Dan Bradley moved to Imperial in 1973, he was one of those who moved with him.  

At Imperial, he continued to work on the theory of mode-locking, as well as starting a new programme on resonant nonlinear frequency-mixing processes.   In the 1980s, with several different PGs and RAs, he developed some new techniques for modelling pulse formation in synchronously-pumped dye lasers, in the course of which he studied noise-induced jitter and self-stabilisation in these systems.  He also worked on excimer laser theory, and modelled a number of experiments within the SPRITE and TITANIA programmes at the Rutherford Appleton Laboratory. More recently, he has worked on optical parametric chirped pulse amplification (OPCPA), excess quantum noise, unstable resonators, fractal laser modes and novel laser beams. 

In the 70s and 80s, he paid many visits of several months to Stanford University, where he interacted with Professors Art Schawlow, Steve Harris, and Tony Siegman.  More recently, he has developed a number of active collaborations with colleagues in other institutes and universities including the University of Leiden (the Netherlands), INAOE (Mexico), the University of Valladolid (Spain) and (in the UK) the Rutherford Appleton Laboratory and the Universities of Oxford, St Andrews, and Glasgow.    

Selected Publications

Journal Articles

Yates MA, New GHC, Albaho T, 2004, Calculating higher-order modes of one-dimensional unstable laser resonators, Journal of Modern Optics, Vol:51, ISSN:0950-0340, Pages:657-667

New GHC, Albaho T, 2003, Spatial spectrum of intensity profiles diffracted by a slit, Journal of Modern Optics, Vol:50, ISSN:0950-0340, Pages:155-160

Ross IN, Matousek P, New GHC, et al., 2002, Analysis and optimization of optical parametric chirped pulse amplification, Journal of the Optical Society of America B - Optical Physics, Vol:19, ISSN:0740-3224, Pages:2945-2956

Yates MA, New GHC, 2002, Fractal dimension of unstable resonator modes, Optics Communications, Vol:208, ISSN:0030-4018, Pages:377-380

New GHC, Yates MA, Woerdman JP, et al., 2001, Diffractive origin of fractal resonator modes, Optics Communications, Vol:193, ISSN:0030-4018, Pages:261-266

Karman GP, McDonald GS, New GHC, et al., 1999, Laser optics - Fractal modes in unstable resonators, Nature, Vol:402, ISSN:0028-0836, Pages:138-138


New G, 2011, Introduction to Nonlinear Optics, Cambridge Univ Pr, ISBN:9780521877015


Rippin MA, New GHC, 1996, Excess noise factors in circular unstable resonators, 12th National Quantum Electronics Conference, TAYLOR & FRANCIS LTD, Pages:993-1008, ISSN:0950-0340

More Publications