Search Results - "Wolffer, N."

Dynamic bandpass filtering using a programmable Interferometer array by Afonso, A., de la Tocnaye, J.Ld.B., Wolffer, N., Defosse, Y., Gautier, P.

“…We describe the principle and present preliminary results obtained on a dynamic bandpass filter using a 4-f free space imaging system with demultiplexing…”
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Effect of the lateral dimension on the grating formation and stability in the double-phase-conjugate mirror: application to interconnects between single-mode fibres by Wolffer, N., Gravey, P.

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Holographic switching between single mode fibres based on electrically addressed nematic liquid crystal gratings with high deflection accuracy by Wolffer, N, Vinouze, B, Gravey, P

“…Accurate control of the deflection angle needed when connecting single mode fibres can be performed in electrically addressed nematic liquid crystal…”
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Comparison of twisted and parallel nematic liquid crystal polarisation controllers. Application to a 4 × 4 free space optical switch at 1.5 μm by Pain, F, Coquillé, R, Vinouze, B, Wolffer, N, Gravey, P

“…This paper describes the design of a polarisation controller using a nematic liquid crystal in the infrared. Theoretical comparison of parallel and twisted…”
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Polarization-independent double phase conjugate mirror by Dupray, V, Brunel, M, Özkul, C, Wolffer, N

“…We present a polarization-independent double phase conjugate mirror (DPCM) working at telecommunication wavelength 1.32 μm. To do this, InP:Fe photorefractive…”
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Double-phase conjugated mirror and double color pumped oscillator in photorefractive InP:Fe by VIEUX, V, GRAVEY, P, WOLFFER, N, PICOLI, G

“…We report on double-phase conjugation at 1.06 μm wavelength in InP:Fe with applied continuous electric field. Conversion efficiencies up to 74% with a grating…”
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Relationship between deep levels in vanadium-doped CdTe and photorefractive effect by Zerrai, A., Marrakchi, G., Bremond, G., Moisan, J.Y., Martel, G., Gauneau, M., Lambert, B., Gravey, P., Wolffer, N., Aoudia, A., Marfaing, Y., Triboulet, R., Koebel, J.M., Hadj-Ali, M., Siffert, P.

“…We present electro-optical characterization (by deep level transient spectroscopy, deep level optical spectroscopy and photo-induced current transient…”
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Influence of zinc on the photorefractive behaviour of Cd1-xZnxTe:V by MARTEL, G, MOISAN, J. Y, TRIBOULET, R, BUSCH, M. C, HADJ-ALI, M, KOEBEL, J. M, SIFFERT, P, BREMOND, G, ZERRAI, A, MARRAKCHI, G, LAMBERT, B, GAUNEAU, M, STEPHAN, S, WOLFFER, N, GRAVEY, P, AOUDIA, A, RZEPKA, E, MARFAING, Y

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Behaviour of hole and electron dominated photorefractive CdTe: V crystals under external continuous or periodic electric field by Moisan, J.Y., Gravey, P., Martel, G., Wolffer, N., Aoudia, A., Marfaing, Y., Triboulet, R., Busch, M.C., Hadj-Ali, M., Koebel, J.M., Siffert, P.

“…The photorefractive properties of two CdTe: V crystals are compared in the infrared range. For both crystals, an increase of the electron-hole competition…”
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Guides D’ondes Planaires À Cristaux Liquides Pour la dÉflection: UNE Àtude Comparative by Gros, E, De Bougrenet De La Tsocnaye J L, coquillé, R, Wolffer, N

“…RésuméDans cet article, on propose une variante technologique pour la réalisation de commutateurs analogiques à plusieurs étages, en utilisant des déflecteurs…”
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Liquid crystal planar waveguide beam shifters : a comparative study by GROS, E, DE BOUGRENET DE LA TOCNAYE, J. L, COQUILLE, R, WOLFFER, N

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Influence of zinc on the photorefractive behaviour of Cd 1− xZn xTe:V by Martel, G., Moisan, J.Y., Lambert, B., Gauneau, M., Stephan, S., Wolffer, N., Gravey, P., Aoudia, A., Rzepka, E., Marfaing, Y., Triboulet, R., Busch, M.C., Hadj-Ali, M., Koebel, J.M., Siffert, P., Bremond, G., Zerrai, A., Marrakchi, G.

“…Recent studies of the photorefractive characteristics of CdTe:V compound have demonstrated this material to provide high two wave mixing gain in the 1–1.5 μm…”
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Liquid crystal planar waveguide beam shifters: a comparative study by Gros, E., De Bougrenet De La Tsocnaye, J. L., coquillé, R., Wolffer, N.

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Polarization-Independent Double Phase Conjugate Mirror by Dupray, V., Brunel, M., Ozkul, C., Wolffer, N., Gravey, P.

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Active 1/spl times/N splitter based on cascaded beam shifters at 1.5 /spl mu/m by Pain, F., Coquille, R., Vinouze, B., Wolffer, N., Gravey, P.

“…Active splitting between up to several hundreds outputs is shown to be feasible using cascaded liquid crystal beam shifters. Performances of 1/spl times/4 and…”
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A CMOS VLSI pilot and support chip for a liquid crystal on silicon 8 × 8 optical cross-connect by Lelah, A., Martel, G., Segovia, T.P., Geoffroy, P., Laval, J., Jayet, P., Vinouze, B., Senn, P., Gravey, P., Wolffer, N., Lever, R., Tan, A.

“…As the telecommunication world turns to wavelength division multiplexed optical transport networks (WDM) needs are growing for large-scale optical cross…”
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