Single-shot Measurement of the Complete Temporal Intensity and Phase of Supercontinuum

Wong, Tsz Chun; Rhodes, Michelle; Trebino, Rick

doi:10.1364/cleo_si.2014.sf1e.2

Cited by 9 publications

(10 citation statements)

References 3 publications

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“…The comparison between techniques introduced in this paper and already-existing single shot phase and amplitude measurement devices (e.g. time stretch [12,44], XFROG [2,8], SEA-SPIDER [23,24], SEA-TADPOLE [4] or STARFISH [5]) represents a complex question that is out of the scope of the present paper and that deserves further analysis.…”

Section: Discussionmentioning

confidence: 99%

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Single-shot measurement of phase and amplitude by using a heterodyne time-lens system and ultrafast digital time-holography

et al. 2018

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Temporal imaging systems are outstanding tools for single-shot observation of optical signals that have irregular and ultrafast dynamics. They allow long time windows to be recorded with femtosecond resolution, and do not rely on complex algorithms. However, simultaneous recording of amplitude and phase remains an open challenge for these systems.Here we present a new heterodyne time-lens arrangement that efficiently records both the amplitude and phase of complex signals, while keeping the performances of classical time-lens systems (∼ 200 fs) and field of view (tens of ps). Phase and time are encoded onto the two spatial dimensions of a camera. We demonstrate direct application of our heterodyne time lens to turbulent-like optical fields and optical rogue waves generated from nonlinear propagation of partially coherent waves inside optical fibres. We also show how this phase-sensitive time-lens system enables digital temporal holography to be performed with even higher temporal resolution (80 fs).Simultaneous measurement of the amplitude and phase of ultrafast complex optical signals is a a key question in modern optics and photonics [1][2][3][4][5][6]. This kind of detection is needed for the characterization of various fundamental phenomena such as e.g. supercontinuum [7,8], optical rogue waves (RWs) [9-11], or soliton dynamics in mode-locked lasers [12,13]. The task remains a particulary challenging open problem when femtosecond resolution and long time windows are simultaneously required. These requirements are found for exemple in the context of nonlinear statistical optics and of the characterization of random light [14] or in the study of spatio-temporal dynamics of lasers [15].In the quest for long-window and ultrafast recording tools, temporal imaging devices, such as time-lenses, are considered as promising candidates. Time-lenses enable femtosecond time evolutions to be manipulated so that they can be magnified in time [16][17][18] or spectrally encoded [10,17,19] with high fidelity. These signals evolution replica can thus be recorded using a simple GHz oscilloscope (for time-magnification systems) or a singleshot optical spectrum analyzer [10]). No special algorithms are necessary for retrieving the ultrafast power evolutions, long windows can be recorded (up to hun-dreds of picoseconds), and the method is suitable for recording continuous-wave (i.e., non-pulsed) complex signals. Recently, temporal imaging systems have thus begun to play a central role in fundamental studies dealing with nonlinear propagation of light in fibers leading for example to the emergence of rogue waves and integrable turbulence [10,11,20], where recording long temporal traces with femtosecond resolution is mandatory. Commercial devices are also available in the market (by Pi-coLuz LLC).However, a range of applications is still hampered by the need to also record the phase evolution of long and complex ultrafast optical signals. Extension of temporal imaging has been performed in this direction, by performing heterodyning ...

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Section: Discussionmentioning

confidence: 99%

“…This kind of detection is needed for the characterization of various fundamental phenomena such as e.g. supercontinuum [7,8], optical rogue waves (RWs) [9][10][11], or soliton dynamics in mode-locked lasers [12,13]. The task remains a particulary challenging open problem when femtosecond resolution and long time windows are simultaneously required.…”

mentioning

confidence: 99%

Single-shot measurement of phase and amplitude by using a heterodyne time-lens system and ultrafast digital time-holography

et al. 2018

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“…However, real-time techniques allowing the full-field characterization of an MI field are still required. In this context, we note that the recently-reported single-shot measurement of the complete temporal intensity and phase of a supercontinuum using an adapted frequency-resolved optical gating technique may represent a very significant step forward 32 .…”

Section: Discussionmentioning

confidence: 99%

Emergent rogue wave structures and statistics in spontaneous modulation instability

Toenger

Godin

Billet

et al. 2015

Sci Rep

111

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The nonlinear Schrödinger equation (NLSE) is a seminal equation of nonlinear physics describing wave packet evolution in weakly-nonlinear dispersive media. The NLSE is especially important in understanding how high amplitude “rogue waves” emerge from noise through the process of modulation instability (MI) whereby a perturbation on an initial plane wave can evolve into strongly-localised “breather” or “soliton on finite background (SFB)” structures. Although there has been much study of such structures excited under controlled conditions, there remains the open question of how closely the analytic solutions of the NLSE actually model localised structures emerging in noise-seeded MI. We address this question here using numerical simulations to compare the properties of a large ensemble of emergent peaks in noise-seeded MI with the known analytic solutions of the NLSE. Our results show that both elementary breather and higher-order SFB structures are observed in chaotic MI, with the characteristics of the noise-induced peaks clustering closely around analytic NLSE predictions. A significant conclusion of our work is to suggest that the widely-held view that the Peregrine soliton forms a rogue wave prototype must be revisited. Rather, we confirm earlier suggestions that NLSE rogue waves are most appropriately identified as collisions between elementary SFB solutions.

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“…For stochastic radiation that exhibits dynamic behaviour, all differences between pulses resulting from noise will be cancelled out in measurements averaged over many of them. Single-shot techniques 25 and direct real-time intensity measurements are required to reveal the internal stochastic structure of individual pulses.…”

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confidence: 99%

Stochasticity, periodicity and localized light structures in partially mode-locked fibre lasers

et al. 2015

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Physical systems with co-existence and interplay of processes featuring distinct spatio-temporal scales are found in various research areas ranging from studies of brain activity to astrophysics. The complexity of such systems makes their theoretical and experimental analysis technically and conceptually challenging. Here, we discovered that while radiation of partially mode-locked fibre lasers is stochastic and intermittent on a short time scale, it exhibits non-trivial periodicity and long-scale correlations over slow evolution from one round-trip to another. A new technique for evolution mapping of intensity autocorrelation function has enabled us to reveal a variety of localized spatio-temporal structures and to experimentally study their symbiotic co-existence with stochastic radiation. Real-time characterization of dynamical spatio-temporal regimes of laser operation is set to bring new insights into rich underlying nonlinear physics of practical active- and passive-cavity photonic systems.

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Single-shot Measurement of the Complete Temporal Intensity and Phase of Supercontinuum

Cited by 9 publications

References 3 publications

Single-shot measurement of phase and amplitude by using a heterodyne time-lens system and ultrafast digital time-holography

Single-shot measurement of phase and amplitude by using a heterodyne time-lens system and ultrafast digital time-holography

Emergent rogue wave structures and statistics in spontaneous modulation instability

Stochasticity, periodicity and localized light structures in partially mode-locked fibre lasers

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