Published in Optical and Quantum Electronics
Fabrication and characterization of SPR based fiber optic sensor utilizing bi-layers of ITO-Ag is presented. Effects of thicknesses of ITO and Ag layers on the sensitivity of sensor are studied experimentally. Sensitivity ascends as the thickness of Ag layer is enhanced till 30 nm and it starts decreasing as the thickness of Ag layers is further in...
Les travaux de cette thèse s’inscrivent dans le cadre d’une collaboration CIFRE entre Naval Group, le Laboratoire d’Hydrodynamique, d’Energétique et d’Environnement Atmosphérique (LHEEA) de l’Ecole Centrale de Nantes et de l’Institut de Génie des Matériaux (GeM) de l’ICAM de Nantes, sur la problématique de développement d’hélices marines plus effic...
Published in Photoacoustics
In this paper, we report a new photoacoustic sensing probe design consisting of two optical fibers. One optical fiber is used for delivering the excitation light pulses. The other one serves as an acoustic delay line to relay the generated PA signal from the target to an outside ultrasound transducer. With the addition of suitable time delay, the o...
Rare-earth-doped oxide nanoparticles in the core of silica optical fibers are becoming well studied as they yield enhanced and tailorable spectroscopic and optical properties. In this paper, the evolution of particle morphology , induced by the drawing step, is studied. Indeed, during the fiber draw process, the glass flows and particles can elonga...
Optická vlákna s Braggovskými mřížkami slouží nejen pro telekomunikační účely, ale také pro účely senzorické a postupně nahrazují dříve používané technologie. Tato diplomová práce je zaměřena na monitorování hustoty automobilové dopravy. Cílem je výroba a otestování mobilního měřícího pásu s FBG senzorem v reálném provozu. Nejprve je zpracována teo...
A novel removal technique of silica optical fiber coating with chemical stripping gel was used. We observed that the fiber strength decreases from 5.48 to 4.96 GPa in the case of tensile test and from 0.06 to 0.05 GPa in the case of bending test when the coating was removed from the cladding surface. But the stress corrosion parameter varies little...
Published in Journal of Mechanical Science and Technology
Miniaturized and “smart” sensors are required for research in biology, physiology, and biomechanics, and they have extremely important clinical applications for diagnostics and minimally invasive surgery. Fiber optic sensors have been proven to provide advantages compared to conventional sensors and high potential for biomechanical and biomedical a...
Cette thèse de doctorat porte sur la conception et la fabrication de microfils optiques de silice par la technique de fusion et d'étirage de fibres optiques standards, ainsi qu'une étude détaillée de leurs propriétés élastiques par spectroscopie Brillouin. Nous apportons une description complète, théorique et expérimentale, des spectres Brillouin r...
Published in Optical and Quantum Electronics
In this paper, we study a nonlinear Schrödinger equation with quintic nonlinearity, self-steepening and self-frequency shift terms describing the polarization mode in an optical fiber. As results, several new chirped soliton solutions not yet reported in the literature are obtained. These solutions are found without using computer codes. The soluti...
The ability to detect substances or molecules with high sensitivity and to image objects with high resolution plays an important role in our everyday life as well as in advances in understanding fundamental phenomena. Optical techniques are generally highly beneficial for this purpose as they are intrinsically remote, non-invasive and exhibit super...
