Search Results - "Velha, P."

Adaptable Pulse Compression in ϕ-OTDR With Direct Digital Synthesis of Probe Waveforms and Rigorously Defined Nonlinear Chirping by Muanenda, Y., Faralli, S., Oton, C. J., Velha, P., Di Pasquale, F. Di

“…Recent research in Phase-Sensitive Optical Time Doman Reflectometry (ϕ-OTDR) has been focused, among others, on performing spatially resolved measurements with…”
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Ultra-High Q/V Fabry-Perot microcavity on SOI substrate by Velha, P, Picard, E, Charvolin, T, Hadji, E, Rodier, J C, Lalanne, P, Peyrade, D

“…We experimentally demonstrate an ultra high Q/V nanocavity on SOI substrate. The design is based on modal adaptation within the cavity and allows to measure a…”
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Low-Power-Consumption Integrated Tunable Filters for WDM Switching Applications in Silicon Photonics by Manganelli, C. L., Velha, P., Pintus, P., Gambini, F., Lemonnier, O., Adelmini, L., Kopp, C., Faralli, S., Di Pasquale, F., Wenger, C., Oton, C. J.

“…We present the experimental results of thermally tunable double microring resonator devices for integrated wavelength division multiplexing applications. The…”
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1.55  μ m direct bandgap electroluminescence from strained n-Ge quantum wells grown on Si substrates by Gallacher, K., Velha, P., Paul, D. J., Cecchi, S., Frigerio, J., Chrastina, D., Isella, G.

“…Electroluminescence from strained n-Ge quantum well light emitting diodes grown on a silicon substrate are demonstrated at room temperature…”
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Compact and efficient injection of light into band-edge slow-modes by Velha, P, Hugonin, J P, Lalanne, P

“…We design compact (a few wavelength long) and efficient (>99%) injectors for coupling light into slow Bloch modes of periodic thin film stacks and of periodic…”
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Ultra-high-reflectivity photonic-bandgap mirrors in a ridge SOI waveguide by Velha, P, Rodier, J C, Lalanne, P, Hugonin, J P, Peyrade, D, Picard, E, Charvolin, T, Hadji, E

“…Microcavities consisting of two identical tapered mirrors etched into silicon-on-insulator ridge waveguides are investigated for operation at telecommunication…”
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Silicon photonic devices for optical data readout in high-energy physics detectors by Cammarata, S., Velha, P., Di Pasquale, F., Saponara, S., Palla, F., Faralli, S.

“…Silicon photonics is standing out as a potential technology for the development of radiation-tolerant optical transceivers. In this work, we report the…”
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Ohmic contacts to n-type germanium with low specific contact resistivity by Gallacher, K., Velha, P., Paul, D. J., MacLaren, I., Myronov, M., Leadley, D. R.

“…A low temperature nickel process has been developed that produces Ohmic contacts to n-type germanium with specific contact resistivities down to (2.3±1.8)×10…”
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Ultracompact microinterferometer-based fiber Bragg grating interrogator on a silicon chip by Elaskar, J., Bontempi, F., Velha, P., Ayaz, R. M. A., Tozzetti, L., Faralli, S., Pasquale, F. Di, Oton, C. J.

“…We report an interferometer-based multiplexed fiber Bragg grating (FBG) interrogator using silicon photonic technology. The photonic-integrated system includes…”
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An integrated and pre-amplified demodulator for 56 Gb/s WDM-DPSK signals by Contestabile, G., Velha, P., Andriolli, N.

“…We demonstrate an InP-integrated WDM-DPSK demodulator encompassing a semiconductor optical preamplifier. The demodulator is based on ad-hoc optical filtering…”
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Near-field interactions between a subwavelength tip and a small-volume photonic-crystal nanocavity by Lalouat, L., Cluzel, B., Velha, P., Picard, E., Peyrade, D., Hugonin, J. P., Lalanne, P., Hadji, E., de Fornel, F.

“…The fundamentals of the near-field interaction between a subwavelength metallic tip and a photonic-crystal nanocavity are investigated experimentally and…”
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Monitoring and Tuning Micro-Ring Properties Using Defect-Enhanced Silicon Photodiodes at 1550 nm by Logan, D. F., Velha, P., Sorel, M., De La Rue, R. M., Jessop, P. E., Knights, A. P.

“…We report on the application of defect-enhanced silicon waveguide photodiodes operating at 1550 nm as power monitors for use in photonic integrated circuits…”
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1.55??m direct bandgap electroluminescence from strained n-Ge quantum wells grown on Si substrates by Gallacher, K, Velha, P, Paul, D J, Cecchi, S, Frigerio, J, Chrastina, D, Isella, G

“…Electroluminescence from strained n-Ge quantum well light emitting diodes grown on a silicon substrate are demonstrated at room temperature…”
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Ultracompact silicon-on-insulator ridge-waveguide mirrors with high reflectance by Velha, P., Rodier, J. C., Lalanne, P., Hugonin, J. P., Peyrade, D., Picard, E., Charvolin, T., Hadji, E.

“…Microcavities offering small modal volumes V≈0.6 (λ∕n)3 and consisting of two identical tapered Bragg mirrors etched into a monomode silicon-on-insulator ridge…”
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Defect-Enhanced Silicon-on-Insulator Waveguide Resonant Photodetector With High Sensitivity at 1.55 \mum by Logan, D F, Velha, P, Sorel, M, De La Rue, R M, Knights, A P, Jessop, P E

“…We describe the fabrication and characterization of a silicon waveguide resonant photodetector compatible with the optical-to-electrical conversion of…”
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Subwavelength imaging of light confinement in high- Q /small- V photonic crystal nanocavity by Lalouat, Loic, Cluzel, Benoit, de Fornel, Frédérique, Velha, Philippe, Lalanne, Philippe, Peyrade, David, Picard, Emmanuel, Charvolin, Thomas, Hadji, Emmanuel

“…The optical near field of a high- Q and ultrasmall volume photonic crystal nanocavity is visualized with a subwavelength resolution by using a scanning…”
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A near-field actuated optical nanocavity by Cluzell, Benoit, Lalouat, Loic, Velha, Philippe, Picard, Emmanuel, Peyrade, David, Rodier, Jean-Claude, Charvolin, Thomas, Lalanne, Philippe, de Fornel, Frédérique, Hadji, Emmanuel

“…We demonstrate here that switching and tuning of a nanocavity resonance can be achieved by approaching a sub-micrometer tip inside its evanescent near-field…”
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Ultracompact silicon-on-insulator ridge-waveguide mirrorswith high reflectance by Velha, P., Rodier, J. C., Lalanne, P., Hugonin, J. P., Peyrade, D., Picard, E., Charvolin, T., Hadji, E.

“…Microcavities offering small modal volumes V ≈ 0.6 ( λ ∕ n ) 3 and consisting of two identical tapered Bragg mirrors etched into a monomode…”
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Generation and manipulation of coherent and incoherent light in silicon structures by Verbert, J., Salomon, A., Noe, P., Cluzel, B., Velha, P., Calvo, V., Charvolin, T., Picard, E., Hadji, E.

“…We will present recent achievements on room temperature silicon based light emitting material and demonstrate strong emission or extraction enhancement by…”
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Process-induced strain bandgap reduction in Germanium nanostructures by Velha, P., Paul, D. J., Myronov, M., Leadley, D. R.

“…We studied the photoluminescence of tensile strained germanium nanostructures. Sub-micron gratings and pillars were fabricated before being coated with…”
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