Abstract We present a numerical study of the evolution dynamics of “optical rogue waves”, statist... more Abstract We present a numerical study of the evolution dynamics of “optical rogue waves”, statistically-rare extreme red-shifted soliton pulses arising from supercontinuum generation in photonic crystal fiber [DR Solli et al. Nature 450, 1054–1058 (2007)].
Broadband noise on supercontinuum spectra generated in microstructure fiber is shown to lead to a... more Broadband noise on supercontinuum spectra generated in microstructure fiber is shown to lead to amplitude fluctuations as large as 50% for certain input laser pulse parameters. We study this noise using both experimental measurements and numerical simulations with a generalized stochastic nonlinear Schrödinger equation, finding good quantitative agreement over a range of input-pulse energies and chirp values.
Abstract We demonstrate the application of nondiffracting Bessel beams for reproducible nanometri... more Abstract We demonstrate the application of nondiffracting Bessel beams for reproducible nanometric-scale feature patterning in glass. A femtosecond pulse zero-order Bessel beam with a central spot radius of 360 nm was used to write 500 nm radius nanocraters over a longitudinal positioning range exceeding 20 μ m, with a variation in radius of less than 10%.
1 2009 marks the tenth anniversary of the first report of white-light supercontinuum generation i... more 1 2009 marks the tenth anniversary of the first report of white-light supercontinuum generation in photonic crystal fiber. This result has created tremendous impact in the field of nonlinear fibre optics, and continues to open up new horizons in photonic science. In this article, we provide a concise and critical summary of the current state of nonlinear optics in photonic crystal fibre, identifying some of the most important and interesting recent developments in the field.
Dans la nature, il est envisageable de transporter de l'énergie sans forcément déplacer de la mat... more Dans la nature, il est envisageable de transporter de l'énergie sans forcément déplacer de la matière. Ceci est notamment possible grâce aux ondes, un concept fondamental des sciences dont les manifestations sont aussi diverses que quotidiennes. Sans en être toujours conscients, nous vivons ainsi entourés d'ondes que cela soit des ondes radio, des ondes lumineuses ou bien encore des ondes sonores. L'exemple le plus visuel d'onde reste sûrement l'onde hydrodynamique, c'est-à-dire la vague.
figure (a) The Peregrine soliton is localized in space and time, showing explode-decay behavior a... more figure (a) The Peregrine soliton is localized in space and time, showing explode-decay behavior along the propagation direction.(b) Experimental frequency resolved optical gating measurements of the Peregrine soliton.(c) Retrieved intensity and phase from experiment (blue) compared with theory (gray) and numerical simulations (red). The inset shows the characteristic phase dislocation.
Supercontinua generated in microstructure fiber can exhibit significant excess amplitude noise. W... more Supercontinua generated in microstructure fiber can exhibit significant excess amplitude noise. We present experimental and numerical studies of the origins of this excess noise and its dependence on the input laser pulse parameters.
Abstract The noise characteristics of supercontinuum generation are characterized using higher-or... more Abstract The noise characteristics of supercontinuum generation are characterized using higher-order statistical moments. Measures of skew and kurtosis, and the coefficient of variation allow quantitative identification of spectral regions dominated by rogue wave like behaviour.
The ability to measure real-time fluctuations of ultrashort pulses propagating in optical fiber h... more The ability to measure real-time fluctuations of ultrashort pulses propagating in optical fiber has provided significant insights into fundamental dynamical effects such as modulation instability and the formation of frequency-shifting rogue wave solitons.
Abstract. This paper describes a simple optical range detector in the time-of-flight TOF category... more Abstract. This paper describes a simple optical range detector in the time-of-flight TOF category using a cw laser diode emitting at 1.55 m. The principle of operation combines TOF with frequency-modulated cw methods. The main originality of this method consists in measuring the time delay between two signals without using the time variable. The forward current of the laser diode is modulated by a low-frequency triangular signal.
The development of high-capacity single-channel optical communications systems using ultra-short ... more The development of high-capacity single-channel optical communications systems using ultra-short pulses [1] will require sensitive measurement techniques possessing ultrafast time response [2, 3]. Currently, the characterization of such systems is usually performed using fast photodetectors in conjunction with high speed oscilloscopes, but this method of characterization is limited to maximum bit rates of about 40 Gbit/s.
Abstract The measurement technique of frequency-resolved optical gating is applied to determine t... more Abstract The measurement technique of frequency-resolved optical gating is applied to determine the nonlinear switching characteristics of a passively modelocked figure-of-eight erbium-doped fiber laser. By completely characterizing the intensity and phase of the laser output pulses, the intracavity fields in the nonlinear amplifying loop mirror of the laser cavity are determined by numerical propagation using the nonlinear Schrodinger equation.
Abstract We review our recent results applying the stable nonlinear propagation of nondiffracting... more Abstract We review our recent results applying the stable nonlinear propagation of nondiffracting Bessel beams to femtosecond laser ablation in dielectric materials. We describe our spatial light modulator setup that allows for flexible and reconfigurable beam profile synthesis, we interpret the physics in terms of the formation of a steady plasma channel, and we present results of both multishot and single shot machining.
Abstract The injection of a phase-and amplitude-shaped pulse into a photonic-crystal fiber provid... more Abstract The injection of a phase-and amplitude-shaped pulse into a photonic-crystal fiber provides additional degrees of freedom that can significantly influence the nature of nonlinear propagation and nonlinear and dispersive interactions. This strong sensitivity of nonlinear effects—particularly the Raman soliton self-frequency shift—greatly extends the parameter space available to generate tailored output fields for applications such as microscopic imaging.
We use caustic beam shaping on 100 fs pulses to experimentally generate nonparaxial accelerating ... more We use caustic beam shaping on 100 fs pulses to experimentally generate nonparaxial accelerating beams along a 60° circular arc, moving laterally by 14 µm over a 28 µm propagation length. This is the highest degree of transverse acceleration reported to our knowledge.
Résumé. Nous étudions les dynamiques d'évolution d'événements optiques de type scélérats, statist... more Résumé. Nous étudions les dynamiques d'évolution d'événements optiques de type scélérats, statistiquement rares et se manifestant par l'apparition de soliton qui ont subi un décalage substantiel vers les grandes longueurs d'onde lors de la génération d'un supercontinuum dans une fibrea cristaux photoniques [DR Solli et al. Nature, 450, 1054-1058 (2007)].
RÉSUMÉ Nous exploitons le phénomène dÑauto-décalage fréquentiel solitonique Raman ayant lieu dans... more RÉSUMÉ Nous exploitons le phénomène dÑauto-décalage fréquentiel solitonique Raman ayant lieu dans les fibres optiques microstructurées pour générer une source femtoseconde continûment accordable en longueur dÑonde. Nous discutons particulièrement les propriétés dispersives à privilégier pour obtenir une densité spectrale de puissance élevée.
The fundamental asymptotic nature of parabolic similariton pulses in normal-dispersion fiber ampl... more The fundamental asymptotic nature of parabolic similariton pulses in normal-dispersion fiber amplifiers is experimentally demonstrated. With frequency-resolved optical gating characterization measurements with a fixed input pulse energy, the output parabolic pulse characteristics are shown to be invariant with the input pulse profile and duration and to be completely determined only by the amplifier parameters.
We present a numerical study of the evolution dynamics of "optical rogue waves", statistically-ra... more We present a numerical study of the evolution dynamics of "optical rogue waves", statistically-rare extreme red-shifted soliton pulses arising from supercontinuum generation in highly nonlinear fibers.
Abstract The generation of alternate multiwavelength pulse trains in an actively mode-locked erbi... more Abstract The generation of alternate multiwavelength pulse trains in an actively mode-locked erbium-doped fiber laser containing an unbalanced Mach-Zehnder interferometer is analyzed using numerical simulations and a theoretical Gaussian pulse analysis. The results obtained allow the interpretation of recent experimental results reporting multiwavelength pulse laser operation and provide a clear physical description of the operation of the multiwavelength laser.
Abstract We present a numerical study of the evolution dynamics of “optical rogue waves”, statist... more Abstract We present a numerical study of the evolution dynamics of “optical rogue waves”, statistically-rare extreme red-shifted soliton pulses arising from supercontinuum generation in photonic crystal fiber [DR Solli et al. Nature 450, 1054–1058 (2007)].
Broadband noise on supercontinuum spectra generated in microstructure fiber is shown to lead to a... more Broadband noise on supercontinuum spectra generated in microstructure fiber is shown to lead to amplitude fluctuations as large as 50% for certain input laser pulse parameters. We study this noise using both experimental measurements and numerical simulations with a generalized stochastic nonlinear Schrödinger equation, finding good quantitative agreement over a range of input-pulse energies and chirp values.
Abstract We demonstrate the application of nondiffracting Bessel beams for reproducible nanometri... more Abstract We demonstrate the application of nondiffracting Bessel beams for reproducible nanometric-scale feature patterning in glass. A femtosecond pulse zero-order Bessel beam with a central spot radius of 360 nm was used to write 500 nm radius nanocraters over a longitudinal positioning range exceeding 20 μ m, with a variation in radius of less than 10%.
1 2009 marks the tenth anniversary of the first report of white-light supercontinuum generation i... more 1 2009 marks the tenth anniversary of the first report of white-light supercontinuum generation in photonic crystal fiber. This result has created tremendous impact in the field of nonlinear fibre optics, and continues to open up new horizons in photonic science. In this article, we provide a concise and critical summary of the current state of nonlinear optics in photonic crystal fibre, identifying some of the most important and interesting recent developments in the field.
Dans la nature, il est envisageable de transporter de l'énergie sans forcément déplacer de la mat... more Dans la nature, il est envisageable de transporter de l'énergie sans forcément déplacer de la matière. Ceci est notamment possible grâce aux ondes, un concept fondamental des sciences dont les manifestations sont aussi diverses que quotidiennes. Sans en être toujours conscients, nous vivons ainsi entourés d'ondes que cela soit des ondes radio, des ondes lumineuses ou bien encore des ondes sonores. L'exemple le plus visuel d'onde reste sûrement l'onde hydrodynamique, c'est-à-dire la vague.
figure (a) The Peregrine soliton is localized in space and time, showing explode-decay behavior a... more figure (a) The Peregrine soliton is localized in space and time, showing explode-decay behavior along the propagation direction.(b) Experimental frequency resolved optical gating measurements of the Peregrine soliton.(c) Retrieved intensity and phase from experiment (blue) compared with theory (gray) and numerical simulations (red). The inset shows the characteristic phase dislocation.
Supercontinua generated in microstructure fiber can exhibit significant excess amplitude noise. W... more Supercontinua generated in microstructure fiber can exhibit significant excess amplitude noise. We present experimental and numerical studies of the origins of this excess noise and its dependence on the input laser pulse parameters.
Abstract The noise characteristics of supercontinuum generation are characterized using higher-or... more Abstract The noise characteristics of supercontinuum generation are characterized using higher-order statistical moments. Measures of skew and kurtosis, and the coefficient of variation allow quantitative identification of spectral regions dominated by rogue wave like behaviour.
The ability to measure real-time fluctuations of ultrashort pulses propagating in optical fiber h... more The ability to measure real-time fluctuations of ultrashort pulses propagating in optical fiber has provided significant insights into fundamental dynamical effects such as modulation instability and the formation of frequency-shifting rogue wave solitons.
Abstract. This paper describes a simple optical range detector in the time-of-flight TOF category... more Abstract. This paper describes a simple optical range detector in the time-of-flight TOF category using a cw laser diode emitting at 1.55 m. The principle of operation combines TOF with frequency-modulated cw methods. The main originality of this method consists in measuring the time delay between two signals without using the time variable. The forward current of the laser diode is modulated by a low-frequency triangular signal.
The development of high-capacity single-channel optical communications systems using ultra-short ... more The development of high-capacity single-channel optical communications systems using ultra-short pulses [1] will require sensitive measurement techniques possessing ultrafast time response [2, 3]. Currently, the characterization of such systems is usually performed using fast photodetectors in conjunction with high speed oscilloscopes, but this method of characterization is limited to maximum bit rates of about 40 Gbit/s.
Abstract The measurement technique of frequency-resolved optical gating is applied to determine t... more Abstract The measurement technique of frequency-resolved optical gating is applied to determine the nonlinear switching characteristics of a passively modelocked figure-of-eight erbium-doped fiber laser. By completely characterizing the intensity and phase of the laser output pulses, the intracavity fields in the nonlinear amplifying loop mirror of the laser cavity are determined by numerical propagation using the nonlinear Schrodinger equation.
Abstract We review our recent results applying the stable nonlinear propagation of nondiffracting... more Abstract We review our recent results applying the stable nonlinear propagation of nondiffracting Bessel beams to femtosecond laser ablation in dielectric materials. We describe our spatial light modulator setup that allows for flexible and reconfigurable beam profile synthesis, we interpret the physics in terms of the formation of a steady plasma channel, and we present results of both multishot and single shot machining.
Abstract The injection of a phase-and amplitude-shaped pulse into a photonic-crystal fiber provid... more Abstract The injection of a phase-and amplitude-shaped pulse into a photonic-crystal fiber provides additional degrees of freedom that can significantly influence the nature of nonlinear propagation and nonlinear and dispersive interactions. This strong sensitivity of nonlinear effects—particularly the Raman soliton self-frequency shift—greatly extends the parameter space available to generate tailored output fields for applications such as microscopic imaging.
We use caustic beam shaping on 100 fs pulses to experimentally generate nonparaxial accelerating ... more We use caustic beam shaping on 100 fs pulses to experimentally generate nonparaxial accelerating beams along a 60° circular arc, moving laterally by 14 µm over a 28 µm propagation length. This is the highest degree of transverse acceleration reported to our knowledge.
Résumé. Nous étudions les dynamiques d'évolution d'événements optiques de type scélérats, statist... more Résumé. Nous étudions les dynamiques d'évolution d'événements optiques de type scélérats, statistiquement rares et se manifestant par l'apparition de soliton qui ont subi un décalage substantiel vers les grandes longueurs d'onde lors de la génération d'un supercontinuum dans une fibrea cristaux photoniques [DR Solli et al. Nature, 450, 1054-1058 (2007)].
RÉSUMÉ Nous exploitons le phénomène dÑauto-décalage fréquentiel solitonique Raman ayant lieu dans... more RÉSUMÉ Nous exploitons le phénomène dÑauto-décalage fréquentiel solitonique Raman ayant lieu dans les fibres optiques microstructurées pour générer une source femtoseconde continûment accordable en longueur dÑonde. Nous discutons particulièrement les propriétés dispersives à privilégier pour obtenir une densité spectrale de puissance élevée.
The fundamental asymptotic nature of parabolic similariton pulses in normal-dispersion fiber ampl... more The fundamental asymptotic nature of parabolic similariton pulses in normal-dispersion fiber amplifiers is experimentally demonstrated. With frequency-resolved optical gating characterization measurements with a fixed input pulse energy, the output parabolic pulse characteristics are shown to be invariant with the input pulse profile and duration and to be completely determined only by the amplifier parameters.
We present a numerical study of the evolution dynamics of "optical rogue waves", statistically-ra... more We present a numerical study of the evolution dynamics of "optical rogue waves", statistically-rare extreme red-shifted soliton pulses arising from supercontinuum generation in highly nonlinear fibers.
Abstract The generation of alternate multiwavelength pulse trains in an actively mode-locked erbi... more Abstract The generation of alternate multiwavelength pulse trains in an actively mode-locked erbium-doped fiber laser containing an unbalanced Mach-Zehnder interferometer is analyzed using numerical simulations and a theoretical Gaussian pulse analysis. The results obtained allow the interpretation of recent experimental results reporting multiwavelength pulse laser operation and provide a clear physical description of the operation of the multiwavelength laser.
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Papers by John Dudley