Dr. Lorenzo L. Columbo Profile

Dr. Lorenzo L. Columbo

Associate Professor at Politecnico di Torino

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Author

Publications (32)

Proceedings Article | 20 June 2024 Presentation + Paper

Towards a label free coherent detectorless imaging module in photonic integrated circuits

Maurizio Dabbicco, Başak Ersöz, Paolo Bardella, Lorenzo Columbo, Massimo Brambilla

Proceedings Volume 13006, 130060R (2024) https://doi.org/10.1117/12.3029530

KEYWORDS: Photonic integrated circuits, Coherence imaging, Imaging systems, Laser applications, Semiconductor lasers

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Proceedings Article | 20 June 2024 Presentation

Dissipative temporal solitons in a fast laser with a saturable absorber

Franco Prati, Massimo Brambilla, Lorenzo Columbo, Luigi Lugiato

Proceedings Volume PC13004, PC130040Q (2024) https://doi.org/10.1117/12.3017140

KEYWORDS: Solitons, Light absorption, Semiconductor lasers, Optical bistability, Mode locking, Quantum cascade lasers, Quantum systems, Quantum phenomena, Quantum modeling, Quantum enhancement

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Proceedings Article | 13 March 2024 Presentation + Paper

Comparative analysis of frequency combs in ring and Fabry-Perot quantum cascade lasers: an order-parameter equation approach

Carlo Silvestri, Paolo Bardella, Massimo Brambilla, Lorenzo Luigi Columbo

Proceedings Volume 12905, 1290507 (2024) https://doi.org/10.1117/12.3002458

KEYWORDS: Quantum cascade lasers, Frequency combs, Fabry Perot interferometers, Quantum numbers, Harmonic generation, Boundary conditions, Quantum modeling, Terahertz radiation, Simulations, Semiconductors

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Proceedings Article | 13 March 2024 Presentation

Nonlinear mid-infrared photonics with active resonators

Dmitry Kazakov, Theodore Letsou, Pawan Ratra, Marco Piccardo, Lorenzo Columbo, Massimo Brambilla, Franco Prati, Sandro Dal Cin, Maximillian Beiser, Nikola Opacak, Michael Pushkarsky, David Caffey, Timothy Day, Luigi Lugiato, Benedikt Schwarz, Federico Capasso

Proceedings Volume PC12905, PC1290508 (2024) https://doi.org/10.1117/12.3003043

KEYWORDS: Mid-IR, Photonics, Tunable filters, Solitons, Semiconductors, Phase shifts, Optical resonators, Nonlinear optics, Nonlinear filtering, Resonators

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Proceedings Article | 13 March 2024 Presentation + Paper

Frequency combs in III-V/SiN integrated hybrid lasers with narrowband mirror

Cristina Rimoldi, Lorenzo Columbo, Mariangela Gioannini

Proceedings Volume 12905, 129050I (2024) https://doi.org/10.1117/12.3003710

KEYWORDS: Reflectivity, Frequency combs, Waveguides, Laser optics, Four wave mixing, Continuous wave operation, Silicon photonics

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Proceedings Article | 13 March 2024 Presentation + Paper

Dynamical analysis of multimode VCSELs with elliptical oxide aperture

Cristina Rimoldi, Lorenzo Columbo, Alberto Tibaldi, Pierluigi Debernardi, Mariangela Gioannini

Proceedings Volume 12904, 129040L (2024) https://doi.org/10.1117/12.3003714

KEYWORDS: Vertical cavity surface emitting lasers, Oxides, Relative intensity noise, Modulation, Data communications, Simulations, Data transmission

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Proceedings Article | 13 March 2024 Presentation

Bright-dark solitons in a hybridized frequency comb

Theodore Letsou, Dmitry Kazakov, Pawan Ratra, Lorenzo Columbo, Sandro Dal Cin, Nikola Opacak, Marco Piccardo, Benedikt Schwarz, Federico Capasso

Proceedings Volume PC12905, PC1290509 (2024) https://doi.org/10.1117/12.3016806

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Proceedings Article | 11 March 2024 Presentation + Paper

Investigation of spatial hole burning and linewidth enhancement factor impact on distributed-feedback quantum cascade lasers dynamics

Sara Zaminga, Lorenzo Columbo, Carlo Silvestri, Mariangela Gioannini, Frédéric Grillot

Proceedings Volume 12880, 1288002 (2024) https://doi.org/10.1117/12.3001622

KEYWORDS: Quantum cascade lasers, Semiconductors, Semiconductor lasers, Quantum physics, Optical gratings, Free space optics, Computer simulations

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Proceedings Article | 9 March 2024 Presentation

Nozaki-Bekki optical solitons

Benedikt Schwarz, Nikola Opacak, Dmitry Kazakov, Lorenzo Columbo, Maximillian Beiser, Theodore Letsou, Florian Pilat, Massimo Brambilla, Franco Prati, Marco Piccardo, Federico Capasso

Proceedings Volume PC12895, PC128950M (2024) https://doi.org/10.1117/12.3003819

KEYWORDS: Optical solitons, Solitons, Semiconductor lasers, Quantum cascade lasers, Microresonators, Spectroscopy, Quantum systems, Quantum signals, Quantum sensing, Quantum optics applications

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Proceedings Article | 17 March 2023 Presentation

Ring quantum cascade lasers as versatile photonic components for the mid-infrared

Dmitry Kazakov, Theodore Letsou, Nikola Opačak, Maximillian Beiser, Sandro Dal Cin, Lorenzo Columbo, Massimo Brambilla, Franco Prati, Luigi Lugiato, Marco Piccardo, Benedikt Schwarz, Federico Capasso

Proceedings Volume PC12440, PC124400I (2023) https://doi.org/10.1117/12.2647068

KEYWORDS: Quantum cascade lasers, Mid-IR, Molecular spectroscopy, Wavelength division multiplexing, Tunable filters, Transceivers, Spectroscopy, Spectrometers, Optical amplifiers, Molecular photonics

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Proceedings Article | 17 March 2023 Presentation

Parametric processes and nonlinear dynamics of self-starting frequency combs

Nikola Opačak, Dmitry Kazakov, Lorenzo Columbo, Maximilian Beiser, Florian Pilat, Massimo Brambilla, Franco Prati, Marco Piccardo, Federico Capasso, Benedikt Schwarz

Proceedings Volume PC12440, PC124400G (2023) https://doi.org/10.1117/12.2651256

KEYWORDS: Frequency combs, Nonlinear dynamics, Semiconductor lasers, Quantum cascade lasers, Fluorescence correlation spectroscopy, Spectroscopy, Mode locking, Microresonators, Laser applications, Fabry–Perot interferometers

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Proceedings Article | 17 March 2023 Presentation

Quantum cascade laser frequency combs induced by a giant Kerr nonlinearity

B. Schwarz, N. Opacak, F. Pilat, D. Kazakov, S. Dal Cin, M. Beiser, L. Columbo, J. Hillbrand, M. Piccardo, F. Capasso

Proceedings Volume PC12440, PC124400F (2023) https://doi.org/10.1117/12.2651688

KEYWORDS: Quantum cascade lasers, Frequency combs, Semiconductor lasers, Nonlinear optics

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Proceedings Article | 17 March 2023 Presentation

Solitary structures and optical frequency combs in a ring quantum cascade laser

Lorenzo Luigi Columbo, Massimo Brambilla, Franco Prati, Nikola Opacak, Dmitry Kazakov, Marco Piccardo, Benedikt Schwarz, Luigi Lugiato, Federico Capasso

Proceedings Volume PC12440, PC124400J (2023) https://doi.org/10.1117/12.2650677

KEYWORDS: Quantum cascade lasers, Frequency combs, Wireless communications, Spectroscopy, Solitons

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Proceedings Article | 30 May 2022 Presentation

Dissipative solitons and frequency combs in a ring quantum cascade laser

Lorenzo Luigi Columbo, Marco Piccardo, Franco Prati, Luigi Lugiato, Massimo Brambilla, Alessandra Gatti, Carlo Silvestri, Mariangela Gioannini, Nikola Opacak, Benedikt Schwarz, Federico Capasso

Proceedings Volume PC12143, PC121430I (2022) https://doi.org/10.1117/12.2631339

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Proceedings Article | 24 May 2022 Presentation

Frequency comb operation induced by a giant Kerr nonlinearity in quantum cascade lasers

Benedikt Schwarz, Nikola Opacak, Florian Pilat, Dmitry Kazakov, Sandro Dal Cin, Maximilian Beiser, Lorenzo Columbo, Johannes Hillbrand, Marco Piccardo, Federico Capasso

Proceedings Volume PC12131, PC121310C (2022) https://doi.org/10.1117/12.2621685

KEYWORDS: Quantum cascade lasers, Frequency combs, Ultrafast phenomena, Turbulence, Spectroscopy, Solitons, Semiconductor lasers, Nonlinear optics

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Proceedings Article | 9 March 2022 Presentation

Frequency combs in ring quantum cascade lasers

Dmitry Kazakov, Maximilian Beiser, Nikola Opacak, Yiyang Zhi, Massimo Brambilla, Lorenzo Columbo, Benedikt Schwarz, Alexey Belyanin, Marco Piccardo, Federico Capasso

Proceedings Volume PC12021, PC1202108 (2022) https://doi.org/10.1117/12.2609111

KEYWORDS: Quantum cascade lasers, Frequency combs, Solitons, Resonators

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Proceedings Article | 4 March 2022 Presentation + Paper

Stability of a III-V/Si hybrid laser with a frequency-selective SiN mirror

Cristina Rimoldi, Lorenzo Columbo, Jock Bovington, Sebastian Romero-Garcia, Dominic Siriani, Mariangela Gioannini

Proceedings Volume 12021, 1202109 (2022) https://doi.org/10.1117/12.2608133

KEYWORDS: Semiconductor lasers, Reflectivity, Mirrors, Continuous wave operation, Laser stabilization, Silicon photonics, Laser applications, Reflectors, Waveguides

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Proceedings Article | 5 March 2021 Presentation

Manipulating frequency comb regimes in semiconductor ring lasers

Dmitry Kazakov, Marco Piccardo, Benedikt Schwarz, Nikola Opacak, Maximilian Beiser, Yongrui Wang, Shantanu Jha, Michele Tamagnone, Johannes Hillbrand, Lorenzo Columbo, Alexey Belyanin, Federico Capasso

Proceedings Volume 11705, 117050R (2021) https://doi.org/10.1117/12.2577301

KEYWORDS: Semiconductor lasers, Frequency combs, Semiconductors, Quantum cascade lasers, Hole burning spectroscopy

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Proceedings Article | 5 March 2021 Presentation

Frequency combs and temporal solitons in a coherently driven ring quantum cascade laser

Lorenzo Columbo, Franco Prati, Luigi Lugiato, Alessandra Gatti, Mariangela Gioannini, Carlo Silvestri, Benedikt Schwarz, Nikola Opacak, Marco Piccardo, Federico Capasso, Massimo Brambilla

Proceedings Volume 11705, 117050Y (2021) https://doi.org/10.1117/12.2578431

KEYWORDS: Quantum cascade lasers, Solitons, Frequency combs, Microresonators, Turbulence, Physics, Optical resonators

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Proceedings Article | 9 March 2020 Presentation

Time domain traveling wave model of optical feedback tolerant hybrid laser design for silicon photonics applications (Conference Presentation)

Lorenzo Luigi Columbo, Jock Bovington, Dominic Siriani, Sebastian Romero-Garcia, Mariangela Gioannini

Proceedings Volume 11301, 113010G (2020) https://doi.org/10.1117/12.2546731

KEYWORDS: Silicon photonics, Hybrid optics, Laser development, Reflectivity, Mirrors, Laser optics, Laser sources, Data communications, Semiconductor lasers, Semiconductor optical amplifiers

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Proceedings Article | 8 March 2019 Presentation

Modeling self-pulsing and self-generation of optical frequency combs in QD lasers (Conference Presentation)

Lorenzo Luigi Columbo, Paolo Bardella, Mariangela Gioannini

Proceedings Volume 10912, 109120K (2019) https://doi.org/10.1117/12.2515899

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Proceedings Article | 4 March 2019 Paper

Bistability in a monolithic multi-section quantum dot semiconductor laser

Dominik Auth, Christoph Weber, Stefan Breuer, Paolo Bardella, Lorenzo Columbo

Proceedings Volume 10939, 109391S (2019) https://doi.org/10.1117/12.2510221

KEYWORDS: Bistability, Semiconductor lasers, Quantum dots, Mode locking, Quantum wells, Numerical simulations

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Proceedings Article | 23 May 2018 Presentation

Self-generation of optical frequency combs in single section QD lasers: theory and numerical modelling (Conference Presentation)

Paolo Bardella, Lorenzo Columbo, Javad Rahimi, Mariangela Gioannini

Proceedings Volume 10682, 106820G (2018) https://doi.org/10.1117/12.2307025

KEYWORDS: Frequency combs, Quantum dot lasers, Numerical modeling, Integrated optics, Semiconductor lasers, Quantum dots, Fabry–Perot interferometers, Continuous wave operation, Quantum cascade lasers, Laser optics

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Optical Frequency Combs (OFC) generated by semiconductor lasers at optical communication wavelengths are promising laser sources for high capacity optical interconnects exploiting WDM techniques; very often they are integrated with Silicon Photonic integrated circuits to realize compact and low-cost transmitters. Quantum Dot (QD) or Quantum Dash (QDash) single section Fabry-Perot lasers have turned to be a good candidate for this application because they can generate a comb of self-locked optical lines using just one laser diode operating in CW and no saturable absorber section. In this talk we review the state-of-art of these devices and their applications, evidencing also the analogies with single section Quantum Cascade Lasers, that, as for QD and QDash lasers, generates optical combs in the mid-IR or THz range. We will focus on the understanding of the physical effects that can explain the self-locking of the lasing lines and we will compare the self-locking mechanism in Quantum Dot and Quantum Well lasers. We will then present the numerical simulation tool we have developed to simulate the self-locking in Quantum Dot Fabry-Perot lasers. Our model is based on a Time-Domain Traveling-Wave (TDTW) approach that properly accounts for coherent radiation-matter interaction in the semiconductor active medium and includes the carrier grating generated by the optical standing wave pattern in the laser cavity. We show that the latter is the fundamental physical effect at the origin of the multi-wavelength spectrum appearing just above the laser threshold, but it is not enough for forcing the self-locking of the optical lines. The self-mode-locking regime associated with the emission of OFC is achieved for higher bias currents and it ascribed to nonlinear phase sensitive effects as Four Wave Mixing (FWM). To quantify the locking of the lines we have calculated some indicators that are obtained by the post processing of the calculated optical electric field of the laser output. These indicators are the RF spectrum at the beat note, the optical linewidth of the lasing lines and the Relative Intensity Noise (RIN) spectrum for both the total power and the power of each line. Varying the CW injected current above threshold we have observed three different regimes: in the first one, at low current, the laser is dominated by multi-wavelength emission with rather wide RF beat note and high low frequency RIN, this regime corresponds to an unlocked regime. In the optical spectrum we observe an optical line and side bands due to FWM components. In the second regime, at much higher current, the RF beat note is extremely narrow and the low frequency RIN of each line reduces significantly; in the optical spectrum the lines narrow and the side-bands disappear. This is a self-locked regime. In an intermediate current range, we have a transition regime where the state (locked or unlocked) depends on the initial conditions. Our results explain in detail the behavior observed experimentally by different research groups and in different QD and Quantum Dash (QDash) devices.

Proceedings Article | 9 May 2018 Paper

RF line width and integrated RIN study of a single-section quantum dot comb laser

Paolo Bardella, Christoph Weber, Lorenzo Columbo, Luke Lester, Mariangela Gioannini, Stefan Breuer

Proceedings Volume 10682, 1068223 (2018) https://doi.org/10.1117/12.2307553

KEYWORDS: Mode locking, Semiconductor lasers, Quantum dots, Frequency combs, Laser optics, Quantum electronics, Quantum cascade lasers, Laser applications, Fabry–Perot interferometers, Applied physics

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Proceedings Article | 19 February 2018 Paper

Spontaneous generation of frequency combs in QD lasers

Lorenzo Luigi Columbo, Paolo Bardella, Mariangela Gioannini

Proceedings Volume 10553, 105530L (2018) https://doi.org/10.1117/12.2289886

KEYWORDS: Frequency combs, Semiconductor lasers, Waveguides, Fabry–Perot interferometers, Quantum dot lasers, Quantum dots, Optical simulations, Polarization, Reflectivity, Four wave mixing

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Proceedings Article | 8 February 2015 Paper

Quantum cascade lasers with optical feedback: regular multimode dynamics

L. Columbo, M. Brambilla, F. Mezzapesa, Maurizio Dabbicco, G. Scamarcio

Proceedings Volume 9370, 937013 (2015) https://doi.org/10.1117/12.2084520

KEYWORDS: Quantum cascade lasers, Mode locking, Terahertz radiation, Semiconductor lasers, Laser optics, Continuous wave operation, Mid-IR, Laser stabilization, Mirrors

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Proceedings Article | 8 February 2015 Paper

Nonlinear frequency mixing in QCL-based interferometry: beyond the intrinsic resolution

Francesco Mezzapesa, Lorenzo Columbo, Massimo Brambilla, Maurizio Dabbicco, Gaetano Scamarcio

Proceedings Volume 9370, 937015 (2015) https://doi.org/10.1117/12.2078829

KEYWORDS: Quantum cascade lasers, Oscillators, Interferometry, Interferometers, Sensors, Infrared sensors, Continuous wave operation, Spatial resolution, Reflection, Super resolution

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Proceedings Article | 4 February 2013 Paper

Single QCL-based sensor measuring the simultaneous displacement of independent targets

Lorenzo Columbo, Francesco Paolo Mezzapesa, Massimo Brambilla, Maurizio Dabbicco, Gaetano Scamarcio

Proceedings Volume 8631, 86312L (2013) https://doi.org/10.1117/12.2004295

KEYWORDS: Quantum cascade lasers, Sensors, Interferometry, Interferometers, Reflectivity, Numerical simulations, Infrared sensors, Target detection, Mirrors, Microfluidics

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Proceedings Article | 11 May 2012 Paper

Self-mixing in VCSELs for multi-parametric sensing applications: theory and experiment

Lorenzo Columbo, Francesco De Lucia, Massimo Brambilla, Maurizio Dabbicco, Gaetano Scamarcio

Proceedings Volume 8432, 843226 (2012) https://doi.org/10.1117/12.946605

KEYWORDS: Polarization, Vertical cavity surface emitting lasers, Semiconductor lasers, Modulation, Reflectivity, Linear polarizers, Sensors, Mirrors, Laser damage threshold, Interferometry

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Proceedings Article | 16 February 2012 Paper

Direct investigation of the ablation rate evolution during laser drilling of high-aspect-ratio micro-holes

Francesco Mezzapesa, Teresa Sibillano, Lorenzo Columbo, Francesca Di Niso, Antonio Ancona, Maurizio Dabbicco, Francesco De Lucia, Pietro Lugarà, Gaetano Scamarcio

Proceedings Volume 8243, 82430S (2012) https://doi.org/10.1117/12.905758

KEYWORDS: Laser ablation, Laser drilling, Aluminum, Metals, Interferometry, Semiconductor lasers, Sensors, Laser development, Ultrafast lasers, Laser applications

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Proceedings Article | 19 May 2008 Paper

Longitudinal multimode dynamics in a Fabry-Perot semiconductor microresonator

L. Columbo, L. Gil

Proceedings Volume 6997, 699721 (2008) https://doi.org/10.1117/12.783298

KEYWORDS: Fabry–Perot interferometers, Semiconductors, Semiconductor lasers, Microresonators, Numerical simulations, Resonators, Vertical cavity surface emitting lasers, Diffraction, Diffusion, Solitons

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Proceedings Article | 28 April 2005 Paper

Cavity light bullets: 3D self-confined structures in a passive nonlinear resonator

Massimo Brambilla, Tommaso Maggipinto, Giuseppe Patera, Lorenzo Columbo

Proceedings Volume 5722, (2005) https://doi.org/10.1117/12.605534

KEYWORDS: Resonators, 3D modeling, Modulation, Computer programming, Diffraction, Mirrors, Solitons, Reflectivity, Gaussian pulse, Microresonators

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Showing 5 of 32 publications

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