Imperial College London

EMERITUS PROFESSOR GEOFF NEW

Faculty of Natural SciencesDepartment of Physics

Senior Research Investigator
 
 
 
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Contact

 

+44 (0)20 7594 7641g.new Website CV

 
 
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Location

 

6M07Huxley BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
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124 results found

Chamorro-Posada P, McDonald GS, New GHC, Fraile-Pelaez FJet al., 1999, Fast algorithm for studying the evolution of optical solitons under perturbations, 8th Biennial IEEE Conference on Electromagnetic Field Computation (IEEE CEFC 98), Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 1558-1561, ISSN: 0018-9464

Conference paper

Marshall RJ, New GHC, Burnett K, Choi Set al., 1999, Exciting, cooling, and vortex trapping in a Bose-condensed gas, PHYSICAL REVIEW A, Vol: 59, Pages: 2085-2093, ISSN: 1050-2947

Journal article

Chamorro-Posada P, McDonald GS, New GHC, 1998, Non-paraxial solitons, 13th National Quantum Electronics Conference, Publisher: TAYLOR & FRANCIS LTD, Pages: 1111-1121, ISSN: 0950-0340

Conference paper

McDonald GS, New GHC, Chan YM, Losev LL, Lutsenko APet al., 1998, Nonlinear competing processes in multifrequency Raman generation, 13th National Quantum Electronics Conference, Publisher: TAYLOR & FRANCIS LTD, Pages: 1099-1110, ISSN: 0950-0340

Conference paper

Ritsataki A, New GHC, Mellish R, Hyde SCW, French PMW, Taylor JRet al., 1998, Theoretical modeling of gain-guiding effects in experimental all-solid-state KLM lasers, Meeting on Ultrafast Optics, Publisher: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, Pages: 185-192, ISSN: 1077-260X

Conference paper

McDonald GS, New GHC, Losev LL, Lutsenko APet al., 1997, On the generation of ultra-broad bandwidth light in air at atmospheric pressure, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 30, Pages: L719-L725, ISSN: 0953-4075

Journal article

Ritsataki A, French PMW, New GHC, 1997, A numerical model of Kerr-lens mode-locking, OPTICS COMMUNICATIONS, Vol: 142, Pages: 315-321, ISSN: 0030-4018

Journal article

Ritsataki A, New GHC, Mellish R, French PMW, Taylor JRet al., 1997, Gain profile analysis in experimental all-solid-state KLM cavities, Pages: 324-325, ISSN: 1092-8081

Models of Kerr-lens modelocked (KLM) lasers with both three- and four-mirror cavities were developed. The first model is a development of the approximate analytical approach while the second involves a beam propagation code that takes full account of the spatial gain profile. Results are applied to in-house diode pumped KLM Cr:LiSAF and Cr:YAG lasers including three mirror cavities.

Conference paper

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

Conference paper

ChavezCerda S, McDonald GS, New GHC, 1996, Nondiffracting beams: Travelling, standing, rotating and spiral waves, OPTICS COMMUNICATIONS, Vol: 123, Pages: 225-233, ISSN: 0030-4018

Journal article

Ritsataki A, French PMW, New GHC, 1996, Numerical model of Kerr-lens mode-locking, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS, ISSN: 1092-8081

In recent years, there has been a great deal of interest in Kerr-lens mode-locking (KLM) in view of its implications for femtosecond pulse generation in solid-state lasers. Simple criteria for determining the cavity parameters that maximize the nonlinear amplitude modulation and promote self-starting have been sought, with attention centered on the parameter δ defined as the relative change of beam size w with power P at one of the cavity mirrors (δ = ((1/w)∂w/∂P)P→0). Optimal KLM operation occurs when δ exhibits its most negative value. The aim of this work has been to develop a general numerical model to calculate values of δ in both the tangential and sagittal planes, taking into consideration astigmatism introduced by off-axis spherical mirrors and Brewster-angled surfaces, nonlinear coupling of the beam sizes between the two planes of polarization, self-focusing and gain-guiding. The way in which contour plots of δ(x, z) change with the introduction of each of the above effects into the model and the effect on the optimum region for KLM have been studied.

Journal article

NEW GHC, WILSON DC, 1995, SIMULATIONS OF RAMAN CONVERSION IN LARGE-APERTURE AMPLIFIERS, OPTICS COMMUNICATIONS, Vol: 119, Pages: 673-681, ISSN: 0030-4018

Journal article

NEW GHC, 1995, THE ORIGIN OF EXCESS NOISE, JOURNAL OF MODERN OPTICS, Vol: 42, Pages: 799-810, ISSN: 0950-0340

Journal article

LI JY, NEW GHC, SMITH K, OBRO Met al., 1995, THEORY OF A FIBER RING LASER MODE-LOCKED BY CROSS-PHASE MODULATION, OPTICS COMMUNICATIONS, Vol: 114, Pages: 119-124, ISSN: 0030-4018

Journal article

MCDONALD GS, NEW GHC, LOSEV LL, LUTSENKO AP, SHAW MJet al., 1995, ON THE GENERATION OF ULTRABROAD BANDWIDTH LIGHT FOR INERTIAL CONFINEMENT FUSION, 23rd European Conference on Laser Interaction with Matter (ECLIM 94), Publisher: IOP PUBLISHING LTD, Pages: 85-88, ISSN: 0951-3248

Conference paper

McDonald GS, New GHC, Losev LL, Lutsenko AP, Shaw MJet al., 1995, On the generation of ultrabroad bandwidth light for inertial confinement fusion, Laser Interaction with Matter, Pages: 85-88, ISSN: 0951-3248

Journal article

MCDONALD GS, NEW GHC, LOSEV LL, LUTSENKO AP, SHAW Met al., 1994, ULTRABROAD-BANDWIDTH MULTIFREQUENCY RAMAN GENERATION, OPTICS LETTERS, Vol: 19, Pages: 1400-1402, ISSN: 0146-9592

Journal article

SHAW MJ, BIALOLENKER G, HIRST GJ, HOOKER CJ, KEY MH, KIDD AK, LISTER JMD, HILL KE, NEW GHC, WILSON DCet al., 1993, ULTRAHIGH-BRIGHTNESS LASER-BEAMS WITH LOW PREPULSE OBTAINED BY STIMULATED RAMAN-SCATTERING, OPTICS LETTERS, Vol: 18, Pages: 1320-1322, ISSN: 0146-9592

Journal article

MOREIRA CA, NEW GHC, 1993, MODE PROFILES IN RESONATORS WITH A NEAR 90-DEGREES ROOF-TOP MIRROR, APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY, Vol: 56, Pages: 373-378, ISSN: 0721-7269

Journal article

HILL KE, NEW GHC, RODGERS PA, BURNETT Ket al., 1992, THE INFLUENCE OF NOISE AND ANGULAR-DISPERSION DURING SHORT PULSE RAMAN AMPLIFICATION, OPTICS COMMUNICATIONS, Vol: 87, Pages: 315-322, ISSN: 0030-4018

Journal article

ADAMU Y, NEW GHC, 1992, FLUCTUATIONS IN COHERENT PULSE-PROPAGATION, OPTICS COMMUNICATIONS, Vol: 87, Pages: 122-126, ISSN: 0030-4018

Journal article

NEW GHC, WOOD D, 1991, DYNAMICS OF GAIN-SWITCHED AND MODE-LOCKED SEMICONDUCTOR-LASERS, JOURNAL OF MODERN OPTICS, Vol: 38, Pages: 785-799, ISSN: 0950-0340

Journal article

HILL KE, NEW GHC, BURNETT K, 1991, COHERENT PULSE-PROPAGATION IN A KRF AMPLIFIER, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 8, Pages: 839-848, ISSN: 0740-3224

Journal article

NEW GHC, 1990, SELF-STABILIZATION OF SYNCHRONOUSLY MODE-LOCKED LASERS, OPTICS LETTERS, Vol: 15, Pages: 1306-1308, ISSN: 0146-9592

Journal article

NEW G, 1990, FEMTOFASCINATION, PHYSICS WORLD, Vol: 3, Pages: 33-37, ISSN: 0953-8585

Journal article

HILL KE, NEW GHC, BURNETT K, 1990, PHOTODISSOCIATION OF KRF BY INTENSE ULTRASHORT PULSES, JOURNAL OF CHEMICAL PHYSICS, Vol: 92, Pages: 5885-5891, ISSN: 0021-9606

Journal article

AVRAMOPOULOS H, FRENCH PMW, NEW GHC, OPALINSKA MM, TAYLOR JR, WILLIAMS JARet al., 1990, TEMPORAL AND SPECTRAL BEHAVIOR OF PASSIVELY MODE-LOCKED DYE-LASERS, OPTICS COMMUNICATIONS, Vol: 76, Pages: 229-234, ISSN: 0030-4018

Journal article

AVRAMOPOULOS H, FRENCH PMW, NEW GHC, OPALINSKA MM, TAYLOR JR, WILLIAMS JARet al., 1989, ANALYSIS OF PERIODIC PULSE EVOLUTIONS IN A PASSIVELY MODE-LOCKED RING DYE-LASER, IEEE JOURNAL OF QUANTUM ELECTRONICS, Vol: 25, Pages: 2469-2475, ISSN: 0018-9197

Journal article

HILL KE, BURNETT K, NEW GHC, 1989, COHERENT PULSE AMPLIFICATION IN EXCIMER LASER-AMPLIFIERS, JOURNAL OF MODERN OPTICS, Vol: 36, Pages: 965-975, ISSN: 0950-0340

Journal article

AVRAMOPOULOS H, NEW GHC, 1989, A NUMERICAL-MODEL FOR THE STUDY OF PHASE EFFECTS IN PASSIVE MODE-LOCKING, OPTICS COMMUNICATIONS, Vol: 71, Pages: 370-376, ISSN: 0030-4018

Journal article

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