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Rapid dynamics in diverse physical systems may often be seeded from noise or arise from highly inhomogeneous disordered environments. Optical solitons and rogue waves in nonlinear media, laser mode locking, soliton molecule interactions, electron bunches in accelerators, and optical-triggered phases in materials are events that carry important information about the system from which they emerge. They may also seed practical applications in lasers and optical communication and sensing. Attempts to understand the underlying dynamics of complex systems are often frustrated by the scarcity of events and by the inability to perform experiments under controlled conditions. In many cases, a large number of single-shot measurements must be done continuously over long time in order to capture the rare event. Such a feat is not possible with traditional pump and probe techniques as they operate in equivalent time as opposed to real time. Moreover, it may be extremely time consuming to model such dynamics with digital simulations, and accuracies are limited by knowledge of the initial conditions. Ultrafast and real-time instruments make it possible to collect large data sets, even for rare events, in a relatively short time period. The knowledge gained from observing rare events in ultrafast systems provides valuable insight into extreme value phenomena that occur over much slower timescales, including those that have a closer connection with human experience. The real-time measurement of fast single-shot events with large record lengths is one of the most challenging problems in the fields of instrumentation and measurement. Notwithstanding the sensitivity and speed requirements needed for single-shot real-time measurements, such instruments also create a big data problem associated with continuous recording at high data rates.

The aim of this conference is to create a forum for presentation of the latest developments in real-time optical instrumentation and complex optical dynamics and to facilitate the exchange of ideas in this new and promising field of science and technology.

Topics of interest include but are not limited to: ;
In progress – view active session
Conference 11986

Real-time Measurements, Rogue Phenomena, and Single-Shot Applications VII

In person: 26 January 2022
View Session ∨
  • 1: Nonlinear Dynamics, Solitons, and Rogues Waves I
  • 2: Nonlinear Dynamics, Solitons, and Rogues Waves II
  • 3: Real-Time Spectroscopy and Ultrafast Measurements I
  • 4: Real-Time Spectroscopy and Ultrafast Measurements II
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POST-DEADLINE ABSTRACT SUBMISSIONS

  • Submissions are accepted through 06-December
  • Notification of acceptance by 20-December

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Session 1: Nonlinear Dynamics, Solitons, and Rogues Waves I
Session Chair: Georg Herink, Univ. Bayreuth (Germany)
11986-1
Author(s): Abdelmajid Taki, Shyam Gopalakrishnan, Lab. de Physique des Lasers, Atomes et Molécules (France); Krassimir Panajotov, Vrije Univ. Brussel (Belgium); Mustapha Tlidi, Univ. Libre de Bruxelles (Belgium)
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We present the existence of dissipative light bullets in Kerr cavities. These three-dimensional (3D) structures consist of either an isolated light bullet (LB), bound together, or could occur in clusters forming well-defined 3D patterns. They can be seen as stationary states in the reference frame moving with the group velocity of light within the cavity. The number of LBs and their distribution in 3D settings are determined by the initial conditions, while their maximum peak power remains constant for a fixed value of the system parameters. Their bifurcation diagram allows us to explain this phenomenon as a manifestation of homoclinic snaking for dissipative light bullets. However, when the strength of the injected beam is increased, LBs lose their stability and the cavity field exhibits giant, short-living 3D pulses. The statistical characterization of pulse amplitude reveals a long tail probability distribution, indicating the occurrence of extreme events, often called rogue waves.
11986-2
Cage solitons (Invited Paper)
Author(s): Günter Steinmeyer, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany); Chao Mei, Univ. of Science and Technology Beijing (China); Ihar Babushkin, Leibniz Univ. Hannover (Germany)
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A new type of soliton is discussed, which emerges in the presence of spectral or spatial confinement. The solution space of these caged solitons can be completely surveyed by an algebraic method after converting the respective PDE into a set of nonlinearly coupled ODEs. The formation of peculiar pulse shapes with concave spectra in few-cycle mode-locking is discussed as one example, and transverse mode-locking effects in hollow-core fibers as the complementary spatial case. Given this surprisingly broad range of application, the cage soliton concept is shown to provide a unique and novel angle of view into soliton physics.
11986-3
Author(s): Elizabeth Grace, Georgia Institute of Technology (United States); Tammy Ma, Lawrence Livermore National Lab. (United States); Zhe Guang, Georgia Institute of Technology (United States); Raspberry A. Simpson, Massachusetts Institute of Technology (United States); Graeme G. Scott, Derek Mariscal, Brent Stuart, Lawrence Livermore National Lab. (United States); Rick Trebino, Georgia Institute of Technology (United States)
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As the repetition rates of high-intensity, ultrashort laser systems increase, diagnostics with matching data collection speeds must be developed. We have previously developed a spatiotemporal laser diagnostic, STRIPED FISH, which measures the complete laser electric field on a single shot. To provide rapid feedback, we now introduce a high-repetition-rate compatible adaptation of the STRIPED FISH retrieval algorithm which condenses the key electric field quantities into a handful of scalars for rapid assessment of the pulse’s first-order spatiotemporal distortions, and we validate this novel retrieval method with an experimental data trace.
11986-4
Author(s): Guillaume Vanderhaegen, Pascal Szriftgiser, Matteo Conforti, Alexandre Kudlinski, Andrea Armaroli, Arnaud Mussot, Lab. de Physique des Lasers, Atomes et Molécules (France)
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We experimentally investigate the noise-driven thermalization of the Fermi Pasta Ulam Tsingou recurrences in fiber optics. Such dynamic is observed when the spontaneous modulation instability (MI), generating noise floor amplification, is able to compete with seeded MI, source of coherent energy transfers between the initial laser beam Fourier modes. By tuning the input noise level, combined with a heterodyne time domain reflectometer and an active loss compensation scheme, we recorded the power and phase distributions of the Fourier modes along the fiber length. We observe the recurrences disappearance to give birth to an almost energy equipartition in the output spectrum.
Session 2: Nonlinear Dynamics, Solitons, and Rogues Waves II
Session Chair: Serge Bielawski, Lab. de Physique des Lasers, Atomes et Molécules (France)
11986-5
Author(s): Pascal Del Haye, Shuangyou Zhang, Max-Planck-Institut für die Physik des Lichts (Germany)
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Whispering gallery mode microresonators are excellent devices to observe nonlinear optical effects at extremely low threshold powers. This talk will present recent results from our research group on optical frequency comb generation in these devices. In particular we will focus on showing results on combs that correspond to bright and dark solitons in different dispersion regimes of the resonator. It is shown that the right conditions can lead to mutually trapped pairs of dark and bright solitons with different center wavelengths. This has interesting applications by providing means to generate frequency combs with a constant output power as well as frequency combs that span wide spectral regions across different dispersion regimes.
11986-6
Author(s): Fanchao Meng, Coraline Lapre, Cyril Billet, Thibaut Sylvestre, Jean-Marc Merolla, Christophe Finot, Univ. Bourgogne Franche-Comté (France); Sergei Turitsyn, Aston Univ. (United Kingdom); Goëry Genty, Tampere Univ. (Finland); John M. Dudley, Univ. Bourgogne Franche-Comté (France)
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We report numerical and experimental studies of instabilities in a “noise-like pulse” dissipative soliton laser generating an output spectrum of 1000 nm bandwidth, and with two orders of magnitude variation in intracavity spectral width over one roundtrip. Simulations identify the origin of the laser instability as the sensitivity to noise of nonlinear soliton dynamics. Our experiments use real-time time and frequency domain measurements, and our simulations reproduce quantitatively both the full extent of intracavity supercontinuum broadening, as well as the probability distributions of temporal and spectral fluctuations, including rogue waves.
11986-7
Author(s): Moti Fridman, Bar-Ilan Univ. (Israel)
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We utilize advanced time-lens to investigate the polarization dynamics of ultrafast solitons in mode-locked fiber lasers. We found the state of polarization of stable solitons, solitons relaxation oscillations in intensity and timing, and unstable solitons which decay in intensity until disappearing or exploding into several solitons. We also found that when two solitons are simultaneously generated close to each other, they attract each other until they collide and merge into a single soliton. Although these two solitons are generated with different states-of-polarization, they shift their state-of-polarization closer to each other until the polarization coincides when they collide.
11986-8
Author(s): Georg Herink, Luca Nimmesgern, Univ. Bayreuth (Germany); Cornelius Beckh, Hannes Kempf, Alfred Leitenstorfer, Univ. Konstanz (Germany)
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Stable arrangements of temporal solitons are reported for essentially every implementation of femtosecond fiber lasers. Their formation can be tracked with today’s real-time instrumentation. However, the underlying interaction mechanism frequently remained elusive and predictions of soliton separations in actual sources are often missing. Here, we present the experimental analysis of bound-state trajectories in a femtosecond Er:fiber laser and reveal the underlying universal coupling mechanism. We demonstrate all-electronic switching between two stable soliton molecules and the feasibility of tuning bound-state separations. The results are applicable to various ultrafast sources and may readily be adapted for generating femtosecond pulse pairs in spectroscopy and material processing.
Session 3: Real-Time Spectroscopy and Ultrafast Measurements I
Session Chair: Daniel R. Solli, UCLA Samueli School of Engineering (United States)
11986-9
Author(s): Michele Caselle, Karlsruher Institut für Technologie (Germany); Serge Bielawski, Univ. de Lille (France); Olena Manzhura, Suren Chilingaryan, Timo Dritschler, Andreas Ebersoldt, Andreas Kopmann, Meghana Patil, Karlsruher Institut für Technologie (Germany); Eléonore Roussel, Christophe Szwaj, Univ. de Lille (France); Erik Bründermann, Anke-Susanne Mueller, Marc Weber, Karlsruher Institut für Technologie (Germany)
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In this contribution, a novel ultra-fast and continuous data sampling system based on photonic time-stretch is presented and the performance is discussed. The proposed data acquisition system is based on the recent RFSoC Zynq FPGA family, which combines an array of multi-channels GS/s of fast-ADCs with a Field Programmable Gate Array (FPGA). The stretched optical pulse is sampled by 16 parallel ADCs operating in time-interleaving mode. The sampled data is then transmitted by a 200 Gbit ethernet data link to the DAQ compute node. The combination of both the optical time-stretch and the fast sampling system is capable to sample an optical pulse with a femtosecond time resolution. The applications of the new system, the advanced artificial intelligence techniques on FPGA, and the commissioning of the first system, for the electron bunches diagnostics, will be discussed.
11986-10
Author(s): Soumen Ghosh, Politecnico di Milano (Italy); Georg Herink, Univ. Bayreuth (Germany); Antonio Perri, Fabrizio Preda, Politecnico di Milano (Italy), NIREOS SRL (Italy); Cristian Manzoni, CNR-Istituto di Fotonica e Nanotecnologie (Italy); Dario Polli, Giulio Cerullo, Politecnico di Milano (Italy), CNR-Istituto di Fotonica e Nanotecnologie (Italy), NIREOS SRL (Italy)
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We introduce a novel setup for the broadband measurement of circular dichroism (CD) and optical rotatory dispersion (ORD) spectra in chiral molecules. The setup utilizes a common-path birefringent interferometer and a heterodyne balanced detection scheme for measuring chirality-induced polarization change across a broad wavelength range in the time domain. Using an incoherent thermal light source, we achieve state-of-the-art sensitivity for broadband CD and ORD spectra, with a measurement time of just a few seconds. The setup allows highly sensitive measurements of glucose concentration and real-time monitoring of fast asymmetric chemical reactions.
11986-11
Author(s): Matthew Sheinman, Boston Univ. (United States)
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We present a method for acquiring a sequence of time-resolved images in a single shot, termed Single-Shot Non-Synchronous Array Photography (SNAP). In SNAP, a diffractive optical element is used to create an array of angled probe beams. Each of these sub-pulses then transmit through an echelon to impart unique time delays, creating an angled pulse train. After probing a scene, the sub-pulses can be differentiated with techniques from light field microscopy. Temporal resolution in SNAP is fundamentally limited only by the probe pulse duration. We demonstrate SNAP by capturing the evolution of a laser initiated plasma at 2 Tfps.
11986-12
Author(s): Tianze Li, Univ. of California, Los Angeles (United States); Tianwei Jiang, Beijing Univ. of Posts and Telecommunications (China)
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Wavelength to time optical spectroscopy (WTS) is a powerful tool to analyze fast chemical and physical phenomenon in single shot. WTS can achieve a single shot measurement, which is an inherent difficulty for comb-based spectroscopy. Conversely, the poor spectral resolution is the main disadvantage for WTS. In this talk, we designed a new system that can significantly improve the resolution by placing a Raman amplified dispersive fiber in a specific fiber loop structure. Broadband laser pulses pass through the dispersive fiber multi times. So, the time domain waveform can be stretched significantly and the resolution can be improved.
Session 4: Real-Time Spectroscopy and Ultrafast Measurements II
Session Chair: Georg Herink, Univ. Bayreuth (Germany)
11986-13
Author(s): Hua Li, Wenjian Wan, Ziping Li, J. C. Cao, Key Lab. of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology (China); Sylvie Lepillet, Jean-Francois Lampin, Kevin Froberger, Institut d'Electronique de Microélectronique et de Nanotechnologie, CNRS (France); Lorenzo Columbo, Politecnico di Torino (Italy), CNR-Istituto di Fotonica e Nanotecnologie (Italy); Massimo Brambilla, Politecnico di Bari (Italy), CNR-Istituto di Fotonica e Nanotecnologie (Italy); Stefano Barbieri, Institut d'Electronique de Microélectronique et de Nanotechnologie, CNRS (France)
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Mode-locking operation and multimode instabilities in Terahertz (THz) quantum cascade lasers (QCLs) have been intensively investigated during the last decade. These studies have unveiled a rich phenomenology, owing to the unique properties of these lasers, in particular their ultrafast gain medium. Thanks to this, in QCLs a modulation of the intracavity field intensity gives rise to a strong modulation of the population inversion, directly affecting the laser current. In this work we show that this property can be used to study the real-time dynamics of multimode THz QCLs, using a self-detection technique combined with a 60GHz real-time oscilloscope. We interpret these measurements using a set of effective semiconductor Maxwell-Bloch equations that qualitatively reproduce the fundamental features of the experimental results. Thanks to its simplicity and versatility, the demonstrated technique is a powerful tool for the study of ultrafast dynamics in THz QCLs.
11986-14
Author(s): Moti Fridman, Bar-Ilan Univ. (Israel)
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We study the aberrations of four-wave mixing-based time-lenses resulting from the cross-phase modulations of the pump wave. These temporal aberrations have no spatial equivalent and are important when imaging weak signals with strong pump waves. We show that as the pump power increases the cross-phase modulations of the pump are responsible for shifting, defocusing, and imposing temporal coma aberrations on the image. We present experimental results of these aberrations with a high agreement to analytical and numerical calculations.
11986-15
Author(s): Francesca Gallazzi, Shanti Toenger, Tampere Univ. (Finland); John M. Dudley, Institut Franche-Comte Electronique Mecanique Thermique et Optique, Univ. Bourgogne Franche-Comté (France); Goëry Genty, Tampere Univ. (Finland)
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We present a method to capture in real-time the full-field of broadband complex optical pulses such as soliton fission induced by noise-seeded modulation instability. The proposed real-time measurement technique is based on Fourier Transform spectral interferometry using as reference a broadband pulse. A stretched phase-stable reference field generated via self-phase modulation is combined with the test field and the resulting spectral interference is measured in real-time with high dynamic range. The full field is then reconstructed from post-processing with 20 fs resolution and over a time window of 20 ps. Experimental results are in very good agreement with numerical simulations.
11986-16
Author(s): G. Resendiz-Lopez, Univ. Tecnológica de Tulancingo (Mexico); Y. G. Gomez-Mohedano, Univ. Politécnica de Tulancingo (Mexico); J. M. Islas-Islas, Univ. Tecnológica de Tulancingo (Mexico); A. Guzman-Barraza, G. Ortega-Mendoza, Univ. Politécnica de Tulancingo (Mexico); G. A. Gomez-Mendez, A. Monzalvo-Hernandez, Univ. Tecnológica de Tulancingo (Mexico); R. M. Muñoz-Rivera, Univ. Politécnica de Tulancingo (Mexico); D. I. Serrano-Garcia, Univ. de Guadalajara (Mexico); L. Garcia-Lechuga, G. Santos-Retama, Noel Ivan Toto-Arellano, Univ. Tecnológica de Tulancingo (Mexico)
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In this research we present an out-of-plane ESPI system coupled to a Michelson configuration to generate two-simultaneous interferograms with relative phase shifts. The system uses cross-elliptically polarization states to generate the phase shifts. The basic operating principle of polarization modulation is described, and results that represent the temporal evolution of an aluminum plate are presented.
Conference Chair
Daniel R. Solli
Univ. of California, Los Angeles (United States)
Conference Chair
Georg Herink
Univ. Bayreuth (Germany)
Conference Chair
Serge Bielawski
Lab. de Physique des Lasers, Atomes et Molécules (France)
Program Committee
The Australian National Univ. (Australia)
Program Committee
Institut Franche-Comte Electronique Mecanique Thermique et Optique (France)
Program Committee
Bar-Ilan Univ. (Israel)
Program Committee
Hideaki Furukawa
National Institute of Information and Communications Technology (Japan)
Program Committee
Tampere Univ. (Finland)
Program Committee
The Univ. of Tokyo (Japan)
Program Committee
Univ. of California, Los Angeles (United States)
Program Committee
Politecnico di Milano (Italy)
Program Committee
William Renninger
The Institute of Optics, Univ. of Rochester (United States)
Program Committee
Georg-August-Univ. Göttingen (Germany)
Program Committee
Günter Steinmeyer
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Germany)
Program Committee
Pierre Suret
Lab. de Physique des Lasers, Atomes et Molécules (France)
Program Committee
Doshisha Univ. (Japan)
Program Committee
Lab. de Physique des Lasers, Atomes et Molécules (France)
Program Committee
Institut de Physique de Nice (France)
Additional Information