A5025232194- Photonic and Optical Devices
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Advanced Fiber Laser Technologies
- Quantum Mechanics and Applications
- Neural Networks and Reservoir Computing
- Optical Network Technologies
- Mechanical and Optical Resonators
- Quantum Computing Algorithms and Architecture
- Photorefractive and Nonlinear Optics
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Advanced Optical Sensing Technologies
- Advanced Photonic Communication Systems
- Photonic Crystal and Fiber Optics
- Cold Atom Physics and Bose-Einstein Condensates
- Orbital Angular Momentum in Optics
- Photonic Crystals and Applications
- Atomic and Subatomic Physics Research
- Advanced Fluorescence Microscopy Techniques
- Spectroscopy and Laser Applications
- Laser-Matter Interactions and Applications
- Semiconductor Quantum Structures and Devices
- Random lasers and scattering media
- Optical Coatings and Gratings
Institut de Physique de Nice
2016-2025
Université Côte d'Azur
2015-2024
Centre National de la Recherche Scientifique
2015-2024
Observatoire de la Côte d’Azur
2018-2024
Institut Universitaire de France
2022
Institut de Biologie Valrose
2022
Laboratoire de physique de la matière condensée
2011-2020
Laboratoire de Physique Théorique de la Matière Condensée
2011-2020
Quantum Technologies (Sweden)
2019
Universitat Politècnica de València
2018
Applications of Integrated Optics to quantum sources, detectors, interfaces, memories and linear optical computing are described in this review. By their inherent compactness, efficiencies, interconnectability, many the demonstrated individual devices can clearly serve as building blocks for more complex systems, that could also profit from incorporation other guided wave technologies.
A new kind of correlated photon-pair source based on a waveguide integrated periodically poled lithium niobate substrate is reported. Using pump laser few µW at 657 nm, photon-pairs are generated/degenerated 1314 nm. Detecting ~1500 coincidences per second, conversion rate 10-6 pairs photon can be inferred, which four orders magnitude higher than that obtained with previous bulk sources. These results very promising for the realisation sources quantum communication and metrology experiments...
We report on the experimental realization and characterization of an asynchronous heralded single-photon source based spontaneous parametric down-conversion. Photons at 1550 nm are as being inside a single-mode fibre with more than 60% probability, multi-photon emission probability is reduced by factor up to 500 compared Poissonian light sources. These figures merit, together choice telecom wavelength for photons, compatible practical applications needing very efficient robust
Complementarity, that is the ability of a quantum object to behave either as particle or wave, one most intriguing features mechanics. An exemplary Gedanken experiment, emphasizing such measurement-dependent nature, was suggested by Wheeler using single photons. The subtleness idea lies in fact output beam-splitter Mach-Zehnder interferometer put removed after photon has already entered interferometer, thus performing delayed test wave-particle complementary behavior. Recently, it proposed...
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...
Abstract A key resource for quantum optics experiments is an on‐demand source of single and multiple photon states at telecommunication wavelengths. This letter presents a heralded based on hybrid technology approach, combining high efficiency periodically poled lithium niobate waveguides, low‐loss laser inscribed circuits, fast (>1 MHz) fibre coupled electro‐optic switches. Hybrid interfacing different platforms promising route to exploiting the advantages existing has permitted...
Abstract Quantum Information Networks (QINs) attract increasing interest, as they enable connecting quantum devices over long distances, thus greatly enhancing their intrinsic computing, sensing, and security capabilities. The core mechanism of a QIN is state teleportation, consuming entanglement, which can be seen in this context new kind network resource. Here we identify use cases per activity sector, including key performance targets, reference for the requirements. We then define...
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...
We have developed a hybrid single photon detection scheme for telecom wavelengths based on nonlinear sum-frequency generation and silicon single-photon avalanche diodes (SPADs). The SPAD devices employed been designed to very narrow temporal response, i.e. low jitter ∼40 ps, which we can exploit increasing the allowable bit rate quantum key distribution. wavelength conversion is obtained using periodically poled lithium niobate waveguides (W/Gs). inherently high efficiency of these W/Gs...
We report the realization of a fiber coupled polarization entangled photon-pair source at 1310 nm based on birefringent titanium in-diffused waveguide integrated periodically poled lithium niobate. By taking advantage dedicated and high-performance setup, we characterized quantum properties pairs by measuring two-photon interference in both Hong-Ou-Mandel standard Bell inequality configurations. obtained, for two sets measurements, net visibilities reaching nearly 100%, which represent...
Squeezed light is a fundamental resource for quantum communication.In view of its real-world applications, the realization easy-to-operate experimental systems compatible with existing fiber networks crucial step.To comply these requirements, we demonstrate feasibility squeezing experiment at telecom wavelength realized, first time, in an entirely guided-wave fashion.In our work, state generation relies on waveguide non-linear optics technology while collection and transmission are...
Abstract Granting information privacy is of crucial importance in our society, notably fiber communication networks. Quantum cryptography provides a unique means to establish, at remote locations, identical strings genuine random bits, with level secrecy unattainable using classical resources. However, several constraints, such as non‐optimized photon number statistics and resources, detectors' noise, optical losses, currently limit the performances terms both achievable secret key rates...
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...
The realization of an ultra-fast source heralded single photons emitted at the wavelength 1540 nm is reported. presented strategy based on state-of-the-art telecom technology, combined with off-the-shelf fiber components and waveguide non-linear stages pumped by a 10 GHz repetition rate laser. are as high 2.1 MHz heralding efficiency 42%. Single-photon character inferred measuring second-order autocorrelation function. For highest rate, value low 0.023 found. This not only proves negligible...
We demonstrate a squeezing experiment exploiting the association of integrated optics and telecom technology as key features for compact, stable, practical continuous variable quantum optics.In our setup, squeezed light is generated by single pass spontaneous parametric down conversion on lithium niobate photonic circuit detected an homodyne detector whose interferometric part directly same platform.The remaining parts are implemented using commercial plug-and-play devices based guided-wave...
We experimentally investigate time-bin qubits for distributed quantum communication. The robustness of maximal and nonmaximal entangled (photons) over distances up to 11 km is shown. entanglement set by controllable parameters in all cases found be robust, that the maintain their degree after transmission along telecommunication fiber.
Abstract Selective optical filters with high rejection levels are of fundamental importance for a wide range advanced photonic circuits. However, the implementation high‐rejection on‐chip is seriously hampered by phase errors arising from fabrication imperfections. Due to coherent interactions, unwanted phase‐shifts result in detrimental destructive interferences that distort filter response, whatever chosen strategy (resonators, interferometers, Bragg filters, etc.). State‐of‐the‐art...
We present the implementation of a time synchronization protocol as part an experimentally deployed entanglement-based quantum key distribution (QKD) link. The system is over 48 km optical fibers across M\'etropole C\^ote d'Azur and enables secret cryptographic exchange between two remote users, with average rate 7 kbps. exploit correlation paired photons generated by high-quality source energy-time entanglement implemented in QKD link to synchronize rubidium clocks located at end stations....
Abstract The interference between two independent photons stands as a crucial aspect of numerous quantum information protocols and technologies. In this work, we leverage fiber-coupled devices, which encompass fibered photon pair-sources off- the-shelf optics, to demonstrate Hong-Ou-Mandel interference. We employ distinct single sources, namely an heralded single-photon source weak coherent laser source, both operating asynchronously in continuous-wave regime. record two-photon coincidences,...
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.