The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Pierre Berini - One of the best experts on this subject based on the ideXlab platform.
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passive Integrated Optics elements based on long range surface plasmon polaritons
Journal of Lightwave Technology, 2006Co-Authors: Robert Charbonneau, Christine Scales, Ian Breukelaar, S Fafard, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:Waveguides and passive Integrated Optics elements constructed from thin metal films of finite width embedded in a homogeneous background dielectric and propagating long-range surface plasmon polaritons (LRSPPs) have been characterized experimentally at free-space optical wavelengths near 1550 nm. Straight and curved waveguides, s-bends, four-port couplers, y-junctions, and Mach-Zehnder interferometers have been carefully characterized. Additionally, rigorous models based on modal decomposition have been proposed for all of these elements and validated via comparisons with the measurements. Excellent qualitative and quantitative agreement between theory and experiment is observed for all structures over all measurement wavelengths. It is hoped that this work will help further establish this new Integrated Optics technology, taking it beyond demonstrators.
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demonstration of Integrated Optics elements based on long ranging surface plasmon polaritons
Optics Express, 2005Co-Authors: Robert Charbonneau, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:An experimental investigation of long-ranging surface plasmonpolariton waves guided along thin finite width Au structures embedded in a homogeneous background dielectric is reported. The operation of key passive Integrated Optics elements such as straight waveguides, s-bends, y-junctions and couplers is demonstrated at a free space optical wavelength of 1550 nm. The influence of some important design parameters on the performance of these elements is presented and discussed.
Robert Charbonneau - One of the best experts on this subject based on the ideXlab platform.
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passive Integrated Optics elements based on long range surface plasmon polaritons
Journal of Lightwave Technology, 2006Co-Authors: Robert Charbonneau, Christine Scales, Ian Breukelaar, S Fafard, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:Waveguides and passive Integrated Optics elements constructed from thin metal films of finite width embedded in a homogeneous background dielectric and propagating long-range surface plasmon polaritons (LRSPPs) have been characterized experimentally at free-space optical wavelengths near 1550 nm. Straight and curved waveguides, s-bends, four-port couplers, y-junctions, and Mach-Zehnder interferometers have been carefully characterized. Additionally, rigorous models based on modal decomposition have been proposed for all of these elements and validated via comparisons with the measurements. Excellent qualitative and quantitative agreement between theory and experiment is observed for all structures over all measurement wavelengths. It is hoped that this work will help further establish this new Integrated Optics technology, taking it beyond demonstrators.
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demonstration of Integrated Optics elements based on long ranging surface plasmon polaritons
Optics Express, 2005Co-Authors: Robert Charbonneau, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:An experimental investigation of long-ranging surface plasmonpolariton waves guided along thin finite width Au structures embedded in a homogeneous background dielectric is reported. The operation of key passive Integrated Optics elements such as straight waveguides, s-bends, y-junctions and couplers is demonstrated at a free space optical wavelength of 1550 nm. The influence of some important design parameters on the performance of these elements is presented and discussed.
Sébastien Tanzilli - One of the best experts on this subject based on the ideXlab platform.
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A quantum relay chip based on telecommunication Integrated Optics technology
New Journal of Physics, 2012Co-Authors: A. Martin, Olivier Alibart, Marc De Micheli, Daniel Barry Ostrowsky, Sébastien TanzilliAbstract:We investigate an Integrated optical circuit on lithium niobate designed to implement a teleportation-based quantum relay scheme for one- way quantum communication at a telecom wavelength. Such an advanced quantum circuit merges for the first time both optical-optical and electro-optical nonlinear functions necessary for implementing the desired on-chip single-qubit teleportation. On the one hand, spontaneous parametric down-conversion is used to produce entangled photon pairs. On the other, we take advantage of two photon routers, consisting of electro-optically controllable couplers, to separate the paired photons and to carry out a Bell state measurement, respectively. After having validated all the individual functions in the classical regime, we performed a Hong-Ou-Mandel experiment to mimic a one-way quantum communication link. Such a quantum effect, seen as a prerequisite towards achieving teleportation, has been obtained at one of the routers when the chip was coupled to an external single-photon source. The two-photon interference pattern shows a net visibility of 80%, which validates the proof of principle of a 'quantum relay circuit' for qubits carried by telecom photons. In the case of optimized losses, such a chip could increase the maximal achievable distance of one-way quantum key distribution links by a factor of 1.8. Our approach and results emphasize the potential of Integrated Optics on lithium niobate as a key technology for future reconfigurable quantum information manipulation.
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A quantum relay chip based on telecommunication Integrated Optics technology
New Journal of Physics, 2012Co-Authors: A. Martin, Olivier Alibart, Marc De Micheli, M. P. De Micheli, Daniel Barry Ostrowsky, Sébastien TanzilliAbstract:We investigate an Integrated optical circuit on lithium niobate designed to implement the teleportation-based quantum relay scheme for one-way quantum communication at a telecom wavelength. Such an advanced quantum circuit merges for the first time, both optical-optical and electro-optical non-linear functions necessary to implement the desired on-chip single qubit teleportation. On one hand, spontaneous parametric down-conversion is used to produce entangled photon-pairs. On the other hand, we take advantage of two photon routers, consisting of electro-optically controllable couplers, to separate the paired photons and to perform a Bell state measurement, respectively. After having validated all the individual functions in the classical regime, we have performed a Hong-Ou-Mandel (HOM) experiment to mimic a one-way quantum communication link. Such a quantum effect, seen as a prerequisite towards achieving teleportation, has been obtained, at one of the routers, when the chip was coupled to an external single photon source. The two-photon interference pattern shows a net visibility of 80%, which validates the proof of principle of a "quantum relay circuit" for qubits carried by telecom photons. In case of optimized losses, such a chip could increase the maximal achievable distance of one-way quantum key distribution links by a factor 1.8. Our approach and results emphasize the high potential of Integrated Optics on lithium niobate as a key technology for future reconfigurable quantum information manipulation.
P Kern - One of the best experts on this subject based on the ideXlab platform.
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mai2 nulling breadboard based on Integrated Optics test results
International Conference on Space Optics — ICSO 2004, 2018Co-Authors: Marc Barillot, P Labeye, P Kern, Isabelle Schanenduport, P Haguenauer, Valerie Weber, Laurence Pujol, Zoran SodnikAbstract:In the framework of the preparation of the Darwin mission, Alcatel Space has been developing a Multi- Aperture Imaging Interferometer (MAI²) for ESA. The main purpose of this activity is to achieve a deep extinction rate, or "nulling", in the laboratory. The performance goal is a 106 nulling of a simulated star. A second objective is to image a planet-like source. The selected operating wavelength is centred around 1.55 microns, with a relative bandwidth of a few percent. The selected function conceptual designs can be updated to the Darwin spectral range (6-18μm).
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first fringes with an Integrated Optics beam combiner at 10 μm a new step towards instrument miniaturization for mid infrared interferometry
Astronomy and Astrophysics, 2011Co-Authors: G Martin, L Labadie, Norman C Anheier, Brahim Arezki, Hong A Qiao, Bruce E Bernacki, P KernAbstract:Context. Observations of milliarcsecond-resolution scales and high dynamic range hold a central place in the exploration of distant planetary systems in order to achieve, for instance, the spectroscopic characterization of exo-Earths or the detailed mapping of their protoplanetary disc birthplace. Multi-aperture infrared interferometry, either from the ground or from space, is a very powerful technique to tackle these goals. However, significant technical efforts still need to be undertaken to achieve a simplification of these instruments if we wish to recombine the light from a large number of telescopes. Integrated-Optics concepts appear to be a suitable alternative to the current conventional designs, especially if their use can be extended to a higher number of astronomical bands. Aims. This article reports, for the first time to our knowledge, the experimental demonstration of the feasibility of an Integrated-Optics approach to mid-infrared beam combination for single-mode stellar interferometry. Methods. We fabricated a two-telescope beam combiner prototype Integrated on a substrate of chalcogenide glass, a material transparent from ∼1 μ mt o∼14 μm. We developed laboratory tools to characterize in the mid-infrared the modal properties and the interferometric capabilities of our device. Results. We obtain interferometric fringes at 10 μm and measure a mean contrast V = 0.981 ± 0.001 with high repeatability over one week and high stability over a time-period of ∼5 h. We show experimentally – as well as on the basis of modeling considerations – that the component has a single-mode behavior at this wavelength, which is essential to achieve high-accuracy interferometry. From previous studies, the propagation losses are estimated to be 0.5 dB/cm for this type of component. We also discuss possible issues that may impact the interferometric contrast. Conclusions. The IO beam combiner performs well at the tested wavelength. We also anticipate the requirement of a closer matching between the numerical apertures of the component and the (de)coupling Optics to optimize the total throughput. The next step foreseen is the achievement of wide-band interferograms.
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an Integrated Optics beam combiner for the second generation vlti instruments
Astronomy and Astrophysics, 2009Co-Authors: M Benisty, L Jocou, K Perraut, P Labeye, J. Berger, F Malbet, P KernAbstract:Context. Recently, an increasing number of scientific publications making use of images obtained with near-infrared long-baseline interferometry have been produced. The technique has reached, at last, a technical maturity level that opens new avenues for numerous astrophysical topics requiring milli-arc-second model-independent imaging. The Very Large Telescope Interferometer (VLTI) will soon be equipped with instruments able to combine between four and six telescopes. Aims. In the framework of the VLTI second generation instruments Gravity and VSI, we propose a new beam combining concept using Integrated Optics (IO) technologies with a novel ABCD-like fringe encoding scheme. Our goal is to demonstrate that IO-based combinations bring considerable advantages in terms of instrumental design and performance. We therefore aim at giving a full characterization of an IO beam combiner in order to establish its performance and check its compliance with the specifications of an imaging instrument. Methods. For this purpose, prototype IO beam combiners have been manufactured and laboratory measurements were made in the H band with a dedicated testbed, simulating a four-telescope interferometer. We studied the beam combiners through the analysis of throughput, instrumental visibilities, phases and closure phases in wide band as well as with spectral dispersion. Study of the polarization properties was also carried out. Results. We obtain competitive throughput (65%), high and stable instrumental contrasts (from 80% in wide band up to 100% ± 1% with spectral dispersion), stable but non-zero closure phases (e.g. 115° ± 2°) which we attribute to internal optical path differences (OPD) that can be calibrated. We validate a new static and an achromatic phase shifting IO function close to the nominal 90° value (e.g. 80° ± 1°). All these observables show limited chromaticity over the H band range. Conclusions. Our results demonstrate that such ABCD-like beam combiners are particularly well suited for interferometric combination of multiple beams to achieve aperture synthesis imaging. This opens the way to extending this technique to all near infrared wavelengths and in particular, the K band.
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an Integrated Optics beam combiner for the second generation vlti instruments
arXiv: Instrumentation and Methods for Astrophysics, 2009Co-Authors: M Benisty, L Jocou, K Perraut, P Labeye, J. Berger, F Malbet, P KernAbstract:The very recent years have seen a promising start in scientific publications making use of images produced by near-infrared long-baseline interferometry. The technique has reached, at last, a technical maturity level that opens new avenues for numerous astrophysical topics requiring milli-arcsecond model-independent imaging. The Very Large Telescope Interferometer (VLTI) is on the path to be equipped with instruments capable to combine between four to six telescopes. In the framework of the VLTI second generation instruments Gravity and VSI, we propose a new beam combining concept using Integrated Optics (IO) technologies with a novel ABCD-like fringe encoding scheme. Our goal is to demonstrate that IO-based combination brings considerable advantages in terms of instrumental design and performance. We therefore aim at giving a full characterization of an IO beam combiner to establish its performances and check its compliance with the specifications of an imaging instrument. Laboratory measurements were made in the H band with a dedicated testbed. We studied the beam combiners through the analysis of throughput, instrumental visibilities, phases and closure phases in wide band as well as with spectral dispersion. Study of the polarization properties is also done. We obtain competitive throughput, high and stable instrumental contrasts, stable but non-zero closure phases which we attribute to internal well calibrable optical path differences. We validate a new static and achromatic phase shifting IO function close to the nominal 90deg value. All these observables show limited chromaticity over the H band range. Our results demonstrate that such ABCD-like beam combiners are particularly well suited to achieve aperture synthesis imaging. This opens the way to extend to all near infrared wavelengths and in particular, the K band.
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technology challenges for space interferometry the option of mid infrared Integrated Optics
Advances in Space Research, 2008Co-Authors: Lucas Labadie, P Labeye, P Kern, E Lecoarer, C Vigreuxbercovici, A Pradel, J E Broquin, Volker KirschnerAbstract:Abstract Nulling interferometry is a technique providing high angular resolution which is the core of the space missions Darwin and TPF . The first objective is to reach a deep degree of starlight cancelation in the range 6–20 μm, in order to observe and to characterize the signal from an earth-like planet. Among the numerous technological challenges involved in these missions, the question of the beam combination and wavefront filtering has an important place. A single-mode Integrated Optics (IO) beam combiner could support both the functions of filtering and the interferometric combination, simplifying the instrumental design. Such a perspective has been explored in this work within the project Integrated Optics for Darwin (IODA), which aims at developing a first IO combiner in the mid-infrared. The solutions reviewed here to manufacture the combiner here are based on infrared dielectric materials on one side, and on metallic conductive waveguides on the other side. With this work, additional inputs are offered to pursue the investigation on mid-infrared photonics devices.
Nancy Lahoud - One of the best experts on this subject based on the ideXlab platform.
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passive Integrated Optics elements based on long range surface plasmon polaritons
Journal of Lightwave Technology, 2006Co-Authors: Robert Charbonneau, Christine Scales, Ian Breukelaar, S Fafard, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:Waveguides and passive Integrated Optics elements constructed from thin metal films of finite width embedded in a homogeneous background dielectric and propagating long-range surface plasmon polaritons (LRSPPs) have been characterized experimentally at free-space optical wavelengths near 1550 nm. Straight and curved waveguides, s-bends, four-port couplers, y-junctions, and Mach-Zehnder interferometers have been carefully characterized. Additionally, rigorous models based on modal decomposition have been proposed for all of these elements and validated via comparisons with the measurements. Excellent qualitative and quantitative agreement between theory and experiment is observed for all structures over all measurement wavelengths. It is hoped that this work will help further establish this new Integrated Optics technology, taking it beyond demonstrators.
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demonstration of Integrated Optics elements based on long ranging surface plasmon polaritons
Optics Express, 2005Co-Authors: Robert Charbonneau, Nancy Lahoud, Greg Mattiussi, Pierre BeriniAbstract:An experimental investigation of long-ranging surface plasmonpolariton waves guided along thin finite width Au structures embedded in a homogeneous background dielectric is reported. The operation of key passive Integrated Optics elements such as straight waveguides, s-bends, y-junctions and couplers is demonstrated at a free space optical wavelength of 1550 nm. The influence of some important design parameters on the performance of these elements is presented and discussed.