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2. Smart Nonlinear Photonics: From On-chip Pulse Processing to Tailored Nonlinear Fiber Propagation

Author

Hoang, V.T., primary, Boussafa, Y., additional, Chaves, B. P., additional, Sader, L., additional, Fischer, B., additional, Chemnitz, M., additional, Roztocki, P., additional, MacLellan, B., additional, Reimer, C., additional, Helsten, R., additional, Février, S., additional, Couderc, V., additional, Kues, M., additional, Pasquazi, A., additional, Peccianti, M., additional, Little, B., additional, Chu, S. T., additional, Moss, D.J., additional, Azaña, J., additional, Morandotti, R., additional, and Wetzel, B., additional

Published
2023
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3. High parametric efficiency in laser cavity-soliton microcombs

Author

Cutrona, Antonio, primary, Rowley, Maxwell, additional, Das, Debayan, additional, Olivieri, Luana, additional, Peters, Luke, additional, Chu, Sai T., additional, Little, Brent E., additional, Morandotti, Roberto, additional, Moss, David J., additional, Totero Gongora, Juan Sebastian, additional, Peccianti, Marco, additional, and Pasquazi, Alessia, additional

Published
2022
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4. Laser Cavity-Solitons and Turing Patterns Microcombs: the Interaction of Slow and Fast Nonlinearities

Author

Alessia Pasquazi, Maxwell Rowley, Pierre Henry Hanzard, Antonio Cutrona, Sai T. Chu, Brent E. Little, Roberto Morandotti, David J. Moss, Juan Sebastian Totero Gongora, and Marco Peccianti

Abstract

Slow nonlinearities are critical in microresonator-based frequency combs, regulating essential phenomena, from stability to soliton starting and formation. We discuss their effect in a microresonator-filtered fiber laser.

Published
2022
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5. Spatiotemporal Superfocusing of Ultrafast Terahertz Waves in Complex Media

Author

Vittorio Cecconi, Vivek Kumar, Alessia Pasquazi, Juan Sebastian Totero Gongora, and Marco Peccianti

Abstract

We present a theoretical/experimental investigation of broadband, spatiotemporal superfocusing (SF) and field-modulation of ultrafast terahertz (THz) waves in scattering media combining the nonlinear conversion of spatially modulated ultrashort pulses with THz time-domain field detection.

Published
2022
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6. Frequency Control of Laser Cavity Solitons for Metrological Applications

Author

Antonio Cutrona, Maxwell Rowley, Abdelkrim Bendahmane, Pierre-Henry Hanzard, Luke Peters, Vittorio Cecconi, Luana Olivieri, Brent E. Little, Sai T. Chu, Roberto Morandotti, David J. Moss, Juan Sebastian Totero-Gongora, Marco Peccianti, and Alessia Pasquazi

Abstract

We show the free-running frequency stability and the frequency control of a micro-comb system comprising a micro-ring nested into an amplifying fibre cavity.

Published
2022
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7. Terahertz 3D micro-tomography via time-resolved nonlinear ghost imaging

Author

Luana Olivieri, Luke Peters, Juan S. Totero Gongora, Alessia Pasquazi, and Marco Peccianti

Abstract

Terahertz near-field microscopy represents a remarkable challenge, deeply limited by diffraction. With our technique; time-resolved nonlinear ghost-imaging, we demonstrate that spatio-temporal coupling affecting subwavelength measurements can be exploited as a lens, retrieving volumetric hyperspectral insights.

Published
2022
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8. Deterministic Terahertz wave control in complex media

Author

Vivek Kumar, Vittorio Cecconi, Luke Peters, Jacopo Bertolotti, Alessia Pasquazi, Juan Sebastian Totero Gongora, and Marco Peccianti

Abstract

Harnessing the propagation of ultrafast pulses through complex media is a key challenge in photonics. In this theoretical work, we demonstrate that THz field-sensitive detection enables the broadband and deterministic spatiotemporal control of complex media.

Published
2022
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13. Frequency Control of Laser Cavity Solitons for Metrological Applications

Author

Cutrona, Antonio, primary, Rowley, Maxwell, additional, Bendahmane, Abdelkrim, additional, Hanzard, Pierre-Henry, additional, Peters, Luke, additional, Cecconi, Vittorio, additional, Olivieri, Luana, additional, Little, Brent E., additional, Chu, Sai T., additional, Morandotti, Roberto, additional, Moss, David J., additional, Totero-Gongora, Juan Sebastian, additional, Peccianti, Marco, additional, and Pasquazi, Alessia, additional

Published
2022
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14. Terahertz Near-Field Hot Carrier Microscopy

Author

Jacob Tunesi, Robyn Tucker, Maxwell Rowley, Luke Peters, Alessia Pasquazi, Marco Peccianti, and Juan Sebastian Totero Gongora

Subjects
Materials science, business.industry, Terahertz radiation, Microscopy, Optoelectronics, Near and far field, business
Abstract

Optical-Pump Terahertz (THz) Near-Field Microscopy (OP-TNFM) is a novel technique for trans- carrier hyperspectral imaging, capable of extracting recombination dynamics and the spatially distributed complex refractive index that results from thermalised carriers in semiconducting materials.

Published
2021
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15. Emergence of Laser Cavity-Solitons in a Microresonator-Filtered Fiber Laser

Author

Pierre-Henry Hanzard, Marco Peccianti, Juan Sebastian Totero Gongora, Brent E. Little, David J. Moss, Antonio Cutrona, Maxwell Rowley, Sai T. Chu, Roberto Morandotti, and Alessia Pasquazi

Subjects
Optical amplifier, Materials science, business.industry, Physics::Optics, Laser, law.invention, Nonlinear system, Aerospace electronics, law, Optical frequencies, Optical cavity, Driving current, Fiber laser, Optoelectronics, business, Nonlinear Sciences::Pattern Formation and Solitons
Abstract

In an open nonlinear system, emergent complex structures are generally determined by a set of global parameters. Cavity-solitons are an example of such structures and, in their temporal form, have seeded the last decade of major developments in microresonator-based optical frequency combs. These optical pulses typically require complex procedures and external feedback to be induced and maintained. Recent progress has seen the microresonators directly embedded into a laser cavity [1] , [2] where it is possible to simply initiate cavity-soliton formation by increasing the laser-diode driving current [3] . Hybrid laser-microresonator schemes have been considered since 2012 [4] , and extremely efficient laser cavity-solitons have been experimentally and theoretically demonstrated in a laser microcomb [5] .

Published
2021
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16. Full-field spatio-temporal shaping via space-time coupling in random media

Author

Alessia Pasquazi, Juan Sebastian Totero Gongora, Vivek Kumar, Marco Peccianti, and Vittorio Cecconi

Subjects
Physics, Coupling, Field (physics), Terahertz radiation, Wave propagation, Space time, Electric field, Acoustics, Broadband, Physics::Optics, Pulse (physics)
Abstract

We present a theoretical investigation of broadband, spatio-temporal control of THz light in random media. We consider the refocusing and compression of a THz pulse by optimising the spatiotemporal features of the transmitted field.

Published
2021
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17. Spontaneous Emergence of Microresonator Laser Cavity- Solitons

Author

Antonio Cutrona, Maxwell Rowley, Pierre-Henry Hanzard, Brent E. Little, Sai T. Chu, Alessia Pasquazi, David J. Moss, Roberto Morandotti, Marco Peccianti, and Juan Sebastian Totero Gongora

Subjects
Physics, Optics, law, business.industry, Optical cavity, business, law.invention
Abstract

A cartographical study is conducted within the parameter space of a microresonator- filtered fiber laser. We identify a region in which solitons are spontaneously formed and maintained, and we investigate the effects which govern their emergence.

Published
2021
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18. Phase-matching-free Two-color Terahertz Emission from Quasi-2D media

Author

Jacob Tunesi, Marco Peccianti, Matteo Clerici, Luke Peters, Alessia Pasquazi, Vittorio Cecconi, and Juan Sebastian Totero Gongora

Subjects
Physics, business.industry, Terahertz radiation, Physics::Optics, Nonlinear optics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Semiconductor laser theory, Optical rectification, Optics, Semiconductor, Electric field, Stimulated emission, business, Absorption (electromagnetic radiation)
Abstract

We provide the first demonstration of two-color optical rectification from semiconductors in an extreme absorption regime. The THz generation is free from phase-matching constraints due to the confinement of the interaction within a 25-atomic-layer region.

Published
2021
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19. Stability properties of temporal cavity solitons in laser micro-cavity based frequency combs

Author

Luana Olivieri, Juan-Sebastian Totero-Gongora, Marco Peccianti, Maxwell Rowley, Gian-Luca Oppo, Antonio Cutrona, Alessia Pasquazi, and Pierre Henry-Hanzard

Subjects
Physics, Optics, business.industry, law, business, Laser, Stability (probability), law.invention
Abstract

The stability of laser temporal cavity solitons in micro-ring cavities nested in an externally pumped fibre loop with gain is investigated. The crucial roles of group velocity mismatch and gain dispersion are identified.

Published
2020
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20. Terahertz Hyperspectral Microscopy via Nonlinear Ghost Imaging

Author

Jacob Tunesi, Juan Sebastian Totero Gongora, Alessia Pasquazi, Luana Olivieri, Robyn Tucker, Vittorio Cecconi, Antonio Cutrona, Luke Peters, and Marco Peccianti

Subjects
Nonlinear system, Optics, Materials science, business.industry, Terahertz radiation, Microscopy, Medical imaging, Physics::Optics, Hyperspectral imaging, Iterative reconstruction, Ghost imaging, Pattern generation, business
Abstract

We demonstrate a Terahertz Ghost-Imaging technique combining nonlinear pattern generation and single-pixel Time-Domain-Spectroscopy (TDS) detection. Our technique allows reconstructing the morphology and spectral features of subwavelength samples.

Published
2020
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24. Terahertz Near-Field Hot Carrier Microscopy

Author

Tucker, Robyn, primary, Peters, Luke, additional, Gongora, Juan Sebastian Totero, additional, Tunesi, Jacob, additional, Rowley, Maxwell, additional, Pasquazi, Alessia, additional, and Peccianti, Marco, additional

Published
2021
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27. Spontaneous Emergence of Microresonator Laser Cavity- Solitons

Author

Rowley, Maxwell, primary, Hanzard, Pierre Henry, additional, Cutrona, Antonio, additional, Chu, Sai T., additional, Little, Brent E., additional, Morandotti, Roberto, additional, Moss, David J., additional, Gongora, Juan Sebastian Totero, additional, Peccianti, Marco, additional, and Pasquazi, Alessia, additional

Published
2021
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28. Real-Time Study of Coexisting States in Laser Cavity Solitons

Author

Hanzard, Pierre Henry, primary, Rowley, Maxwell, additional, Cutrona, Antonio, additional, Chu, Sai T., additional, Little, Brent E., additional, Morandotti, Roberto, additional, Moss, David J., additional, Wetzel, Benjamin, additional, Gongora, Juan Sebastian Totero, additional, Peccianti, Marco, additional, and Pasquazi, Alessia, additional

Published
2021
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33. Mieroeombs Eased on Laser Cavity Solitons

Author

Pasquazi, Alessia, primary, Eao, Hualong, additional, Rowley, Maxwell, additional, Hazard, Pierre-Henry, additional, Olivieri, Luana, additional, Cutrona, Antonio, additional, Wetzel, Benjamin, additional, Di Lauro, Luigi, additional, Gongora, Juan Sebastian Totero, additional, Chu, Sai T., additional, Little, Erent E., additional, Oppo, Gian-Luea, additional, Morandotti, Roberto, additional, Moss, David J., additional, and Peeeianti, Mareo, additional

Published
2020
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34. 3084329.pdf

Author

Tomasino, Alessandro, Mazhorova, Anna, Clerici, Matteo, Peccianti, Marco, Ho, Sze Phing, jestin, yoann, Pasquazi, Alessia, Markov, Andrey, Jin, Xin, and Piccoli, Riccardo

Abstract

Supplemental document

Published
2017
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42. Parametric interaction of laser cavity-solitons with an external CW pump.

Author

Cooper A, Olivieri L, Cutrona A, Das D, Peters L, Chu ST, Little B, Morandotti R, Moss DJ, Peccianti M, and Pasquazi A

Abstract

We study the interaction of a laser cavity-soliton microcomb with an externally coupled, co-propagating tunable CW pump, observing parametric Kerr interactions which lead to the formation of both a cross-phase modulation and a four-wave mixing replica of the laser cavity-soliton. We compare and explain the dependence of the microcomb spectra from both the cavity-soliton and pump parameters, demonstrating the ability to adjust the microcomb externally without breaking or interfering with the soliton state. The parametric nature of the process agrees with numerical simulations. The parametric extended state maintains the typical robustness of laser-cavity solitons.

Published
2024
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43. Thermo-optical pulsing in a microresonator filtered fiber-laser: a route towards all-optical control and synchronization.

Author

Rowley M, Wetzel B, Di Lauro L, Gongora JST, Bao H, Silver J, Del Bino L, Haye PD, Peccianti M, and Pasquazi A

Abstract

We report on 'slow' pulsing dynamics in a silica resonator-based laser system: by nesting a high-Q rod-resonator inside an amplifying fiber cavity, we demonstrate that trains of microsecond pulses can be generated with repetition rates in the hundreds of kilohertz. We show that such pulses are produced with a period equivalent to several hundreds of laser cavity roundtrips via the interaction between the gain dynamics in the fiber cavity and the thermo-optical effects in the high-Q resonator. Experiments reveal that the pulsing properties can be controlled by adjusting the amplifying fiber cavity parameters. Our results, confirmed by numerical simulations, provide useful insights on the dynamical onset of complex self-organization phenomena in resonator-based laser systems where thermo-optical effects play an active role. In addition, we show how the thermal state of the resonator can be probed and even modified by an external, counter-propagating optical field, thus hinting towards novel approaches for all-optical control and sensing applications.

Published
2019
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44. Parametric control of thermal self-pulsation in micro-cavities.

Author

Di Lauro L, Li J, Moss DJ, Morandotti R, Chu ST, Peccianti M, and Pasquazi A

Abstract

We propose a scheme for bifurcation control in micro-cavities based on the interplay between the ultrafast Kerr effect and a slow nonlinearity, such as thermo-optical, free-carriers-induced, or opto-mechanical one. We demonstrate that Hopf bifurcations can be efficiently controlled with a low energy signal via four-wave mixing. Our results show that new strategies are possible for designing efficient micro-cavity-based oscillators and sensors. Moreover, they provide new understanding of the effect of coherent wave mixing in the thermal stability regions of optical micro-cavities, fundamental for micro-resonator-based applications in communications, sensing, and metrology, including optical micro-combs.

Published
2017
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45. CMOS compatible integrated all-optical radio frequency spectrum analyzer.

Author

Ferrera M, Reimer C, Pasquazi A, Peccianti M, Clerici M, Caspani L, Chu ST, Little BE, Morandotti R, and Moss DJ

Abstract

We report an integrated all-optical radio frequency spectrum analyzer based on a ~4 cm long doped silica glass waveguide, with a bandwidth greater than 2.5 THz. We use this device to characterize the intensity power spectrum of ultrahigh repetition rate mode-locked lasers at repetition rates up to 400 GHz, and observe dynamic noise related behavior not observable with other techniques.

Published
2014
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46. Integrated frequency comb source of heralded single photons.

Author

Reimer C, Caspani L, Clerici M, Ferrera M, Kues M, Peccianti M, Pasquazi A, Razzari L, Little BE, Chu ST, Moss DJ, and Morandotti R

Abstract

We report an integrated photon pair source based on a CMOS-compatible microring resonator that generates multiple, simultaneous, and independent photon pairs at different wavelengths in a frequency comb compatible with fiber communication wavelength division multiplexing channels (200 GHz channel separation) and with a linewidth that is compatible with quantum memories (110 MHz). It operates in a self-locked pump configuration, avoiding the need for active stabilization, making it extremely robust even at very low power levels.

Published
2014
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47. Self-locked optical parametric oscillation in a CMOS compatible microring resonator: a route to robust optical frequency comb generation on a chip.

Author

Pasquazi A, Caspani L, Peccianti M, Clerici M, Ferrera M, Razzari L, Duchesne D, Little BE, Chu ST, Moss DJ, and Morandotti R

Abstract

We report a novel geometry for OPOs based on nonlinear microcavity resonators. This approach relies on a self-locked scheme that enables OPO emission without the need for thermal locking of the pump laser to the microcavity resonance. By exploiting a CMOS-compatible microring resonator, we achieve oscillation featured by a complete absence of "shutting down", i.e. the self-terminating behavior that is a very common and detrimental occurrence in externally pumped OPOs. Further, our scheme consistently produces very wide bandwidth (>300nm, limited by our experimental set-up) combs that oscillate at a spacing equal to the FSR of the micro cavity resonance.

Published
2013
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48. FLEA: Fresnel-limited extraction algorithm applied to spectral phase interferometry for direct field reconstruction (SPIDER).

Author

Pasquazi A, Peccianti M, Azaña J, Moss DJ, and Morandotti R

Abstract

We present an extraction algorithm for spectral phase interferometry for direct field reconstruction (SPIDER) in the so-called X-SPIDER configuration. Our approach largely extends the measurable time windows of pulses without requiring any modification to the experimental X-SPIDER setup.

Published
2013
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49. Stable, dual mode, high repetition rate mode-locked laser based on a microring resonator.

Author

Pasquazi A, Peccianti M, Little BE, Chu ST, Moss DJ, and Morandotti R

Subjects
Absorption, Equipment Design, Optical Phenomena, Semiconductors, Lasers, Solid-State
Abstract

We demonstrate a novel mode locked ultrafast laser, based on an integrated high-Q microring resonator. Our scheme exhibits stable operation of two slightly shifted spectral optical comb replicas. It generates a highly monochromatic radiofrequency modulation of 65.8MHz with a linewidth < 10kHz, on a 200GHz output pulse train.

Published
2012
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50. Interaction of self-trapped beams in high index glass.

Author

D'Asaro E, Heidari-Bateni S, Pasquazi A, Assanto G, Gonzalo J, Solis J, and Afonso CN

Abstract

We observe attraction, repulsion and energy exchange between two self-trapped beams in a heavy-metal-oxide glass exhibiting a Kerr-like response with multiphoton absorption. The coherent interaction between spatial solitons is controlled by their relative phase and modelled by a nonlinear dissipative Schrödinger equation.

Published
2009
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