Prof. Goëry Genty Profile

Prof. Goëry Genty

at Tampere Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (24)

Proceedings Article | 8 March 2021 Presentation

Predicting ultrafast nonlinear dynamics in optical fiber using neural networks

Goëry Genty, Lauri Salmela, John Dudley

Proc. SPIE. 11665, Fiber Lasers XVIII: Technology and Systems

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Deep learning for new insights into ultrafast dynamics and extreme events in nonlinear fibre optics

Goery Genty, Lauri Salmela, Alessandro Foi, Juha Toivonen, Mathilde Hary, Mikko Narhi, Medhdi Mabed, Cyril Billet, John Dudley

Proc. SPIE. 11703, AI and Optical Data Sciences II

KEYWORDS: Ultrafast phenomena, Modulation, Fiber optics, Physics, Solitons, Numerical simulations, Numerical integration, Nonlinear optics, Neural networks, Supercontinuum generation

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Full-field prediction of supercontinuum generation dynamics

Lauri Salmela, Mathilde Hary, John Dudley, Goëry Genty

Proc. SPIE. 11703, AI and Optical Data Sciences II

KEYWORDS: Ultrafast phenomena, Optical design, Nonlinear dynamics, Neural networks, Machine learning, Supercontinuum generation

Read Abstract +

Proceedings Article | 1 April 2020 Presentation

Low noise mid-infrared supercontinuum generation in multimode chalcogenide fiber (Conference Presentation)

Zahra Eslami, Piotr Ryczkowski, Lauri Salmela, Goery Genty

Proc. SPIE. 11358, Nonlinear Optics and its Applications 2020

Read Abstract +

Supercontinuum light (SC) is a broadband source with unique properties as the result of cascaded nonlinear dynamics when intense light propagates in a nonlinear material [1]. Recently, the generation of broadband SC sources operating in the mid-infrared (MIR) has attracted significant interest due to a wide range of potential applications in spectroscopy [2], microscopy, molecular fingerprinting [3], environmental monitoring and LIDAR [4], just to name a few. Fibers made of non-silica soft glasses such as fluoride, tellurite and chalcogenide are good candidates for SC generation in the MIR due to their high intrinsic nonlinearity and wide transparency window in this wavelength range. Supercontinuum generation in the MIR is typically achieved by propagating femtosecond pulses into the anomalous dispersion regime of a single-mode soft glass fibers. This typically leads to SC sources which are limited in terms of average power due to the low damage threshold associated with soft glasses and susceptible to noise due to the anomalous pump regime. These inherent limitations can be detrimental for many applications such as e.g. optical coherence tomography (OCT), photoacoustic imaging [5], or spectroscopy where the performance critically depends on the power and noise properties of the light source. In this work, we demonstrate for the first time the generation of a low noise high power SC in the MIR by injecting 350 fs pulses from an optical parametric amplifier into the normal dispersion regime of a one meter-long multimode step-index chalcogenide fiber with 100 µm core diameter. We show the generation of SC spanning from 1700 nm to 4800 nm for a pump wavelength at 3500 nm (located in normal dispersion regime of the used fiber) and an input peak power of 570 kW. A systematic study of the SC intensity noise is performed as a function of different pump parameters and for different output wavelengths show that the initial fluctuations on the pump laser are at most amplified by a factor of 2 at the spectral edge of the SC. Although the output beam in this case is multimoded, it can still be used for many practical applications such as long-distance remote sensing for which high power and low noise are more essential than the actual beam profile quality. Our results open novel perspective for the generation of high power low-noise broadband light sources in the MIR.

Proceedings Article | 1 April 2020 Presentation

Predicting optical rogue solitons in supercontinuum generation using machine learning (Conference Presentation)

Lauri Salmela, Coraline Lapre, John Dudley, Goëry Genty

Proc. SPIE. 11358, Nonlinear Optics and its Applications 2020

Read Abstract +

Proceedings Article | 1 April 2020 Presentation

Real-time measurement of soliton-similariton explosions and intermittence instabilities in a mode-locked fibre laser (Conference Presentation)

Coraline Lapre, Cyril Billet, Fanchao Meng, Piotr Ryczkowski, Thibaut Sylvestre, Christophe Finot, Goery Genty, John Dudley

Proc. SPIE. 11358, Nonlinear Optics and its Applications 2020

Read Abstract +

Ultrafast mode-locked lasers are well-known to display a rich variety of unstable dissipative soliton dynamics resulting from the interplay of nonlinearity, dispersion and dissipation. Although laser instabilities have been known and studied in depth for many years, their properties have recently received greatly renewed attention because of the development of time and frequency domain techniques that allow laser dynamics and instabilities to be measured in real-time. This has allowed the variations in circulating pulse characteristics to be examined on a roundtrip to roundtrip basis, providing a new window into understanding these instabilities and how they develop based on the cavity configuration being used. A technique of this kind that has proven both straightforward to implement and powerful is the photonic time stretch or dispersive Fourier transform (DFT) which has been used in a number of important applications including the measurement of soliton rogue waves, modulation instability and supercontinuum noise. The DFT allows direct access to shot-to-shot measurement of the mode-locked fibre laser spectrum and, via computation of the associated autocorrelation function, can also provide complementary time-domain information in cases where multiple pulse states are observed. In this paper, we report results of DFT measurements which have been used to reveal previously unreported behavior in a mode-locked fiber laser designed to operate with soliton-similariton dynamics. In particular, we observe instabilities including soliton explosions, chaotic evolution and oscillation in the relative phase of bound-state multi-pulse molecules, and what we believe to be a previously-unobserved regime of operation associated with the intermittent appearance of short-lived stable single pulses within of otherwise chaotic dynamics. Our results - obtained in a laser believed to be a particularly stable design - suggest that instabilities such as soliton explosions and intermittence are a universal feature of dissipative soliton systems transitioning from noise to stability.

Proceedings Article | 1 April 2020 Presentation + Paper

Reproducing complex explosion and intermittence dynamics in a dissipative soliton laser using a scalar iterative map

Fanchao Meng, Coraline Lapre, Cyril Billet, Goëry Genty, John Dudley

Proc. SPIE. 11358, Nonlinear Optics and its Applications 2020

KEYWORDS: Optical filters, Mode locking, Molecules, Solitons, Single mode fibers, Laser resonators, Picosecond phenomena, Molecular interactions, Molecular lasers, Pulsed laser operation

Read Abstract +

Proceedings Article | 11 March 2020 Presentation

Short-range supercontinuum Lidar for combustion diagnostics (Conference Presentation)

Abba Saleh, Piotr Ryczkowski, Goery Genty, Juha Toivonen

Proc. SPIE. 11260, Fiber Lasers XVII: Technology and Systems

KEYWORDS: Light sources, Light emitting diodes, Fiber optics, LIDAR, Combustion, Nonlinear optics, Absorption spectroscopy, Spatial resolution, Signal detection, Absorption

Read Abstract +

Proceedings Article | 9 March 2020 Presentation

Instabilities in fiber-optics systems: from real-time measurements to machine learning (Conference Presentation)

Goëry Genty, John Dudley, Piotr Ryczkowski, Lauri Salmela, Cyril Billet, Coraline Lapre

Proc. SPIE. 11265, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications V

KEYWORDS: Ultrafast phenomena, Ultrafast measurement systems, Modulation, Fiber optics, Fourier transforms, Spectral resolution, Machine learning, Supercontinuum generation, Fiber optics tests

Read Abstract +

Proceedings Article | 12 November 2019 Paper

Short-range supercontinuum based lidar for combustion diagnostics

Abba Saleh, Piotr Ryczkowski, Goery Genty, Juha Toivonen

Proc. SPIE. 11197, SPIE Future Sensing Technologies

KEYWORDS: Light sources, Light emitting diodes, Fiber optics, LIDAR, Combustion, Nonlinear optics, Absorption spectroscopy, Spatial resolution, Signal detection, Absorption

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Ghost imaging in the spectral domain (Conference Presentation)

Goëry Genty, Caroline Amiot, Piotr Ryczkowski, Ari Friberg, John Dudley

Proc. SPIE. 10903, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IV

KEYWORDS: Light sources, Ultrafast measurement systems, Sensors, Photons, Image resolution, Optical testing, Beam shaping, Picosecond phenomena, Signal detection, Ultrafast imaging

Read Abstract +

Proceedings Article | 4 March 2019 Presentation

Predicting extreme events and statistics in modulation instability using machine learning (Conference Presentation)

Goëry Genty, Lauri Salemla, Mikko Närhi, Cyril Billet, Juha Toivonen, John Dudley

Proc. SPIE. 10903, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IV

KEYWORDS: Data modeling, Modulation, Fourier transforms, Interference (communication), Numerical simulations, Nonlinear optics, Neural networks, Machine learning, Systems modeling, Chaos

Read Abstract +

Proceedings Article | 14 March 2018 Presentation

Real-time full field measurements of transient dissipative soliton dynamics in a passively mode-locked laser (Conference Presentation)

Piotr Ryczkowski, Mikko Närhi, Cyril Billet, Jean-Marc Merolla, Goëry Genty, John Dudley

Proc. SPIE. 10517, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications III

KEYWORDS: Molecules, Fourier transforms, Solitons, Fiber lasers, Temporal resolution, Phase retrieval, Time metrology, Spectral resolution, Reconstruction algorithms, Phase measurement

Read Abstract +

Proceedings Article | 21 April 2017 Presentation

Real time measurements of spontaneous breathers generated by modulation instability in optical fibre (Conference Presentation)

John Dudley, Mikko Närhi, Benjamin Wetzel, Cyril Billet, Jean-Marc Merolla, Shanti Toenger, Thibaut Sylvestre, Roberto Morandotti, Goëry Genty, Frédéric Dias

Proc. SPIE. 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II

KEYWORDS: Optical fibers, Ultrafast phenomena, Modulation, Fiber optics, Complex systems, Plasmas, Physics, Time metrology, Nonlinear optics, Systems modeling

Read Abstract +

Proceedings Article | 21 April 2017 Presentation

Wavelength-multiplexed ghost imaging in time (Conference Presentation)

Piotr Ryczkowski, Goëry Genty, Margaux Barbier, Ari Friberg, John Dudley

Proc. SPIE. 10089, Real-time Measurements, Rogue Phenomena, and Single-Shot Applications II

KEYWORDS: Optical imaging, Optical filters, Light sources, Light emitting diodes, Real time imaging, Multiplexing, Computer programming, Image transmission, Electrooptic modulators, Ultrafast imaging

Read Abstract +

Proceedings Article | 1 May 2014 Paper

Controlling modulation instability using an incoherent low amplitude seed

Thomas Godin, Duc Minh Nguyen, Shanti Toenger, Yves Combes, Benjamin Wetzel, Thibaut Sylvestre, Goëry Genty, Frédéric Dias, John Dudley

Proc. SPIE. 9136, Nonlinear Optics and Its Applications VIII; and Quantum Optics III

KEYWORDS: Signal to noise ratio, Optical fibers, Continuous wave operation, Optical amplifiers, Modulation, Dispersion, Fourier transforms, Numerical simulations, Nonlinear optics, Picosecond phenomena

Read Abstract +

Proceedings Article | 1 May 2012 Paper

Second-harmonic generation from silicon nitride films

Tingyin Ning, Henna Pietarinen, Outi Hyvärinen, Janne Simonen, Goëry Genty, Martti Kauranen

Proc. SPIE. 8424, Nanophotonics IV

KEYWORDS: Thin films, Refractive index, Second-harmonic generation, Modulation, Silica, Polarization, Silicon, Silicon films, Plasma enhanced chemical vapor deposition, Dielectric polarization

Read Abstract +

Proceedings Article | 10 May 2011 Paper

Analytical studies of modulation instability and nonlinear compression dynamics in optical fiber propagation

B. Wetzel, M. Erkintalo, G. Genty, F. Dias, K. Hammani, B. Kibler, J. Fatome, C. Finot, G. Millot, N. Akhmediev, J. Dudley

Proc. SPIE. 8073, Optical Sensors 2011; and Photonic Crystal Fibers V

KEYWORDS: Optical fibers, Ultrafast phenomena, Modulation, Physics, Numerical simulations, Wave propagation, Nonlinear optics, Analytical research, Electroluminescent displays

Read Abstract +

Proceedings Article | 22 February 2011 Paper

Failure and limitations of linear Raman gain approximation for fiber supercontinuum generation modelling

Miro Erkintalo, Goëry Genty, Benjamin Wetzel, John Dudley

Proc. SPIE. 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X

KEYWORDS: Silica, Dispersion, Solitons, Raman spectroscopy, Wave propagation, Nonlinear optics, Terahertz radiation, Raman scattering, Supercontinuum generation, Nonlinear response

Read Abstract +

Proceedings Article | 22 February 2011 Paper

Rediscovered dynamics of nonlinear fiber optics: from breathers to extreme localisation

Bertrand Kibler, Julien Fatome, Christophe Finot, Kamal Hammani, Guy Millot, Frederic Dias, Goëry Genty, Miro Erkintalo, Nail Akhmediev, Benjamin Wetzel, John Dudley

Proc. SPIE. 7917, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications X

KEYWORDS: Ultrafast phenomena, Continuous wave operation, Modulation, Fiber optics, Physics, Solitons, Phase shift keying, Wave propagation, Nonlinear optics, Supercontinuum generation

Read Abstract +

Proceedings Article | 5 June 2010 Paper

Akhmediev Breather dynamics and the nonlinear modulation instability spectrum

Goëry Genty, Frederic Dias, Bertrand Kibler, Nail Akhmediev, John Dudley

Proc. SPIE. 7728, Nonlinear Optics and Applications IV

KEYWORDS: Photonic crystal fibers, Modulation, Dispersion, Solitons, Numerical simulations, Ocean optics, Turbulence, Nonlinear optics, Supercontinuum generation

Read Abstract +

Proceedings Article | 26 February 2010 Paper

Rogue waves in femtosecond supercontinuum generation

M. Erkintalo, G. Genty, J. Dudley

Proc. SPIE. 7598, Optical Components and Materials VII

KEYWORDS: Optical fibers, Optical filters, Femtosecond phenomena, Modulation, Dispersion, Solitons, Linear filtering, Raman spectroscopy, Ocean optics, Supercontinuum generation

Read Abstract +

Proceedings Article | 17 February 2010 Paper

Modulation instability, Akhmediev breathers, and rogue waves in nonlinear fiber optics

John Dudley, Goëry Genty, Frederic Dias, Bertrand Kibler, Nail Akhmediev

Proc. SPIE. 7580, Fiber Lasers VII: Technology, Systems, and Applications

KEYWORDS: Photonic crystal fibers, Modulation, Fiber optics, Dispersion, Solitons, Numerical simulations, Ocean optics, Nonlinear optics, Supercontinuum generation

Read Abstract +

Proceedings Article | 7 February 2009 Paper

New approaches to supercontinuum control in the long pulse regime

G. Genty, J. Dudley

Proc. SPIE. 7212, Optical Components and Materials VI

KEYWORDS: Optical fibers, Photonic crystal fibers, Femtosecond phenomena, Modulation, Dispersion, Solitons, Numerical simulations, Raman spectroscopy, Wave propagation, Picosecond phenomena

Read Abstract +