Sources lasers hybrides III-V sur silicium pour les communications optiques

Photonic integration reduces the size and energy consumption of fiber optic communication systems compared to systems assembled from discrete components. This technology has recently attracted a great interest with the progress of integration on InP and the development of silicon photonics. The latter challenges the integration platform on InP as high-performance and low-cost components can be manufactured in foundries originally developed for microelectronics. Lasers are one of the main parts of transceivers for optical communications. With their integration on the silicon platform, transceivers that include the critical functions of light emission, modulation and detection on the same chip can be made. In the heterogeneous integration platform, components are manufactured in high volumes: several tens or even hundreds of components are produced per wafer. In this thesis, I studied theoretically and experimentally the properties of tunable lasers based on silicon ring resonators, directly modulated distributed feedback lasers and low noise high-quality factor lasersL’intégration photonique permet de réduire la taille et la consommation d’énergie des systèmes de communication par fibre optique par rapport aux systèmes assemblés à partir de composants unitaires. Cette technologie a récemment suscité un grand intérêt avec les progrès de l’intégration sur InP et le développement de la photonique sur silicium. Cette dernière challenge la plate-forme d’intégration sur InP car des composants à hautes performances et faibles coûts peuvent être fabriqués dans des fonderies originellement développées pour la microélectronique. Les lasers sont l'une des pièces maitresses des émetteurs-récepteurs pour les communications optiques. Leur intégration sur la plateforme silicium permet de développer des émetteurs-récepteurs comprenant les fonctions critiques d’émission de lumière, de modulation et de détection sur une même puce. L’intégration de matériaux III-V par collage moléculaire sur plaque silicium permet de produire de grands volumes : plusieurs dizaines voire centaines de composants sont réalisés par wafer. Dans cette thèse, j’ai étudié théoriquement et expérimentalement les propriétés des lasers accordables basés sur des résonateurs en anneau en silicium, des lasers à rétroaction distribuée modulés directement et des lasers à haut facteur de qualité qui présentent un faible bruit de phase et d’intensité

Design, Fabrication and Characterization of Hybrid III-V/SOI Phase-shift Free DFB Laser with Tapered Silicon waveguide

International audienc

Passive Chaos Bandwidth Enhancement Under Dual-Optical Feedback with Hybrid III–V/Si DFB Laser

International audienceThe chaotic dynamics of a DFB laser are studied experimentally under a combination of short and long feedbacks. Chaos bandwidth enhancement is demonstrated using a hybrid III-V/Si DFB laser with a large relaxation oscillation frequency (ROF) of 14 GHz. The impact of short feedback on the ROF is studied and an increase of 2 GHz is observed. Under long feedback, the route to chaos of the device and its dependence on the short feedback dynamics are studied. The short feedback allows tuning the chaotic dynamics obtained under long feedback, and the increase of the ROF translates into an enhancement of the chaos bandwidth to above 16 GHz. This configuration can allow generation of wideband chaos using a single laser source in a photonic integrated circuit

Influences of Nanoparticles Characteristics on the Cellular Responses: The Example of Iron Oxide and Macrophages

Iron oxide nanoparticles/microparticles are widely present in a variety of environments, e.g., as a byproduct of steel and iron degradation, as, for example, in railway brakes (e.g., metro station) or in welding fumes. As all particulate material, these metallic nanoparticles are taken up by macrophages, a cell type playing a key role in the innate immune response, including pathogen removal phagocytosis, secretion of free radical species such as nitric oxide or by controlling inflammation via cytokine release. In this paper, we evaluated how macrophages functions were altered by two iron based particles of different size (100 nm and 20 nm). We showed that at high, but subtoxic concentrations (1 mg/mL, large nanoparticles induced stronger perturbations in macrophages functions such as phagocytic capacity (tested with fluorescent latex microspheres) and the ability to respond to bacterial endotoxin lipopolysaccharide stimulus (LPS) in secreting nitric oxide and pro-cytokines (e.g., Interleukin-6 (IL-6) and Tumor Necrosis Factor (TNF)). These stronger effects may correlate with an observed stronger uptake of iron for the larger nanoparticles

Long Delay Optical Feedback Sensitivity of Hybrid III-V/SOI Directly Modulated DFB Lasers

International audienc

Direct modulation of a hybrid III-V/Si DFB laser with MRR filtering for 22.5-Gb/s error-free dispersion-uncompensated transmission over 2.5-km SSMF

International audienceError-free and penalty-free transmission over 2.5 km SSMF of a 22.5 Gb/s data signal from a directly modulated hybrid III-V/Si DFB laser is achieved by enhancing the dispersion tolerance using a silicon micro-ring resonator

Directly modulated and ER enhanced hybrid III-V/SOI DFB laser operating up to 20 Gb/s for extended reach applications in PONs

International audienceWe demonstrate error-free performance of an MRR filtered DML on the SOI platform over 40-and 81-km of SSMF. The device operates up to 17.5 Gb/s over 81 km and 20 Gb/s over 40 km

Influences of Nanoparticles Characteristics on the Cellular Responses: The Example of Iron Oxide and Macrophages

International audienceIron oxide nanoparticles/microparticles are widely present in a variety of environments, e.g., as a byproduct of steel and iron degradation, as, for example, in railway brakes (e.g., metro station) or in welding fumes. As all particulate material, these metallic nanoparticles are taken up by macrophages, a cell type playing a key role in the innate immune response, including pathogen removal phagocytosis, secretion of free radical species such as nitric oxide or by controlling inflammation via cytokine release. In this paper, we evaluated how macrophages functions were altered by two iron based particles of different size (100 nm and 20 nm). We showed that at high, but subtoxic concentrations (1 mg/mL, large nanoparticles induced stronger perturbations in macrophages functions such as phagocytic capacity (tested with fluorescent latex microspheres) and the ability to respond to bacterial endotoxin lipopolysaccharide stimulus (LPS) in secreting nitric oxide and pro-cytokines (e.g., Interleukin-6 (IL-6) and Tumor Necrosis Factor (TNF)). These stronger effects may correlate with an observed stronger uptake of iron for the larger nanoparticles

Repeaterless data transmission at 1310 nm using silicon photonic integrated circuit

NRZ data with PRBS length 231 − 1, was propagated over 25 km of standard single mode fibre at a rate of 10 Gbit/s and 12.5 Gbit/s in a repeater-less transmission system. Results show that, for a received optical power of −13.2 dBm, the BER were 2.7 × 10−6 and 3.3 × 10−4 respectively, with sufficient margin below the FEC limit of 1 × 10−3 . The packaged transmitter comprised an integrated DFB laser, electro-absorption modulator and semiconductor optical amplifier hybrid integrated on silicon wafer