A5073944777- Advanced Fiber Laser Technologies
- Education, sociology, and vocational training
- Photonic and Optical Devices
- Cultural Insights and Digital Impacts
- Science Education and Pedagogy
- History and Theory of Mathematics
- Agriculture and Rural Development Research
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Linguistics and Discourse Analysis
- Educational Strategies and Epistemologies
- Optical Network Technologies
- Historical Astronomy and Related Studies
- French Urban and Social Studies
- Historical and Literary Studies
- History and Developments in Astronomy
- Psychoanalysis and Psychopathology Research
- Quantum Information and Cryptography
- Historical and Architectural Studies
- Education and Critical Thinking Development
- Animal and Plant Science Education
- French Language Learning Methods
- Educational Tools and Methods
- Nonlinear Photonic Systems
- Quantum optics and atomic interactions
Université Côte d'Azur
1999-2024
Centre National de la Recherche Scientifique
1994-2024
Institut de Physique de Nice
2009-2024
Maison des Sciences de l'Homme
2016-2024
Maison des Sciences de l'Homme et de la Société Sud-Est
2016-2024
Maison des Sciences sociales et des Humanités Lorraine
2019-2022
Laboratoire de physique de la matière condensée
2003-2018
Laboratoire de Physique Théorique de la Matière Condensée
2003-2018
Observatoire de la Côte d’Azur
1998-2018
Nantes Université
2018
Integrated optical components on lithium niobate play a major role in standard high-speed communication systems. Over the last two decades, after birth and positioning of quantum information science, waveguide architectures have emerged as one key platforms for enabling photonics technologies. Due to mature technological processes structure integration, well inherent efficient properties nonlinear effects, devices are nowadays at heart many photon-pair or triplet sources, single-photon...
Although understandings of scientific inquiry (as opposed to conducting inquiry) are included in science education reform documents around the world, little is known about what students have learned during their elementary school years. This partially due lack any assessment instrument measure inquiry. However, a valid and reliable has recently been developed published, Views About Scientific Inquiry (VASI; Lederman et al. [2014], Journal Research Science Teaching, 51, 65–83). The purpose...
Over the last two decades, integrated photonics has profoundly revolutionized domain of quantum technologies. The ongoing second revolution stands as a timely opportunity for state-of-the-art review and, most important, an exploration directions undertaken by photonics. Within this perspective, based on recent advances, we discuss current challenges and future trends related to different technological platforms. Key examples will be considered across various subfields, including...
Nonstationary stimulated Brillouin backscattering in a large gain optical-fiber ring cavity laser exhibits superluminous Stokes pulses of quasisoliton type and partial self-induced transparency for the pump. Experimental evidences, comforted by numerical simulation three-wave coherent model taking acoustic-wave dynamics into account, show that this class long transients occurs even with cw-coupled pump wave.
We report an efficient energy-time entangled photon-pair source based on four-wave mixing in a CMOS-compatible silicon photonics ring resonator. Thanks to suitable optimization, the shows large spectral brightness of 400 pairs photons /s/MHz for 500 μW pump power, compatible with standard telecom dense wavelength division multiplexers. demonstrate high-purity entanglement, i.e., free photonic noise, near perfect raw visibilities (> 98%) between various channel C-band. Such compact stands as...
Les technologies quantiques s’aventurent aujourd’hui en dehors des laboratoires. Une équipe chinoise a même déjà distribué clefs sur plusieurs milliers de km via un satellite. De telles annonces sensationnelles masquent cependant la partie immergée l’iceberg : seconde révolution quantique est constituée d’une multitude d’avancées scientifiques et technologiques très diverses, que nous souhaitons illustrer ici par démonstration réalisée l’équipe azuréenne distribution clef 50 basée l’intrication.
Understandings of the nature scientific inquiry (NOSI), as opposed to engaging students in learning experiences, are included science education reform documents around world. However, little is known about what have learned NOSI during their pre-college school years. The purpose this large-scale follow-up international project (i.e. 32 countries and regions, spanning six continents including 3917 for high sample) was collect data on exiting NOSI. Additionally, study investigated changes 12th...
Stability analysis allows the understanding of experimental steady and pulsed regimes observed in cw-pumped Brillouin fiber-ring lasers. The instantaneous acoustic response model proves to be singular, while coherent stimulated-Brillouin-scattering (SBS) three-wave yields a well-behaved Hopf bifurcation for critical value feedback (several percent intensity). computed nonlinear dynamics shows self-organization asymptotically stable pulses, not depending on initial noise. Further experiments...
A stable train of compressed Stokes pulses (to ~10 nsec) is obtained in a stimulated Brillouin fiber ring laser (of length L = 83 m) by periodically interrupting the argon-ion cw pump beam with an intraring cavity acousto-optic modulator. Interruption action, at each round-trip time tr ≃ Ln/c, permits damping excited sound waves that accumulate entry owing to inertial response material, well described coherent three-wave scattering model (C3W-SBS equations). Amplification and compression...
Photon statistical measurements on a semiconductor microlaser, obtained using single-photon counting techniques, show that newly discovered spontaneous pulsed emission regime possesses superthermal properties. The observed spike dynamics, typical of small-scale devices, is at the origin an unexpected discordance between probability density function and its representation in terms first moments, so far unnoticed all devices. impact this new dynamics potentially large, since coincidence...
The nonlinear dynamics of cw-pumped Brillouin long-fiber ring lasers that contain a large number longitudinal modes N beneath the gain curve is controlled by single parameter, namely, Stokes feedback R. Below Rcrit, stable train dissipative solitonic pulses spontaneously structured at round-trip frequency fr without any additional intracavity mode locking. Experimental observations in fiber cavities, supported numerical simulation coherent space–time three-wave model includes optical Kerr...
Knowledge of scientific inquiry (SI) is considered essential to the development an individual's Scientific Literacy (SL) and therefore, SI included in many international science education reform documents. Two previous large scale studies assessed understandings students entering middle school secondary at end their formal K-12 education. The purpose this project was use VASI-E collect data on what primary level have learned about first few years school. This study adds research bridge...
Transverse material inhomogeneities yielding the guiding properties of any optical fibre also cause a variation stimulated Brillouin resonance frequency, and thus spectral broadening as well reduction overall SBS gain. A simple model defines an effective steady gain, may explain dispersion available measured values.
Pulse propagation in optical fibers may electrostrictively excite acoustic waves as a result of cladding Brillouin scattering, transversally propagating with respect to the fiber axis fiber's cladding, and mechanical coating. We show, for first time our knowledge, experimentally theoretically that these transverse resonances within finite frequency ranges cooperatively couple longitudinal modes resonator, giving rise stable trains either spread or compressed three-wave solitons propose...
Because the material time response of silica is very short (∼75 fs), it neglected in most models stimulated Raman scattering optical fibers as soon characteristic pulse width involved interaction lies picosecond range. We discuss these and relevance this approximation when both a pump Stokes wave are distinguishable. show that excitation resonantly coupled to fields thus can be responsible for chaotic dynamics, even regime, strong power.
La légende dorée de l’astronomie moderne réduit souvent son histoire à deux moments marquants : la « révolution copernicienne » et le défi Galilée l’obscurantisme présumé l’Église. Inévitablement, réelle s’avère plus riche subtile, en interaction permanente avec l’imaginaire scientifique temps. Nous proposons relire lumière l’histoire science-fiction, d’examiner quelle manière celle-ci a pu contribuer déstabiliser les paradigmes astronomiques du passé tenter d’identifier quelques enjeux...
We investigate the dynamics of backward stimulated Raman process in optical fibers; spatiotemporal (1+1)-dimensional three-wave dissipative inertial model accounts for noninstantaneous response medium, Kerr effect, and group velocity dispersion. A different class superluminous solitary structures emerges from a chaotic Stokes dynamics. In contrast with nonlinear Schr\"odinger equations, wave plays key role has been determined by Kolmogorov-Petrovskii-Piskunov procedure. The long-term...
A coherent model of cladding Brillouin scattering (CBS) is proposed. This describes both the so-called (spontaneous) guided acoustic wave (GAWBS) in low field limit, and 'long-range interaction' observed solitonic fibre transmissions. The coupling CBS with optical Kerr effect discussed.