Zobrazeno 1 - 10 of 39 pro vyhledávání: '"G. Froc"'
1
Photon return analysis of a polychromatic laser guide star
Autor: E. Rosencher, V. Michau, B Attal-Trétout, G. Froc
Publikováno v: Optics Communications. 178:405-409
The numbers of UV photons detected in a two photon sodium guide star are calculated in different laser excitation regimes. These values are somewhat smaller than the one obtained for monochromatic beacon. This comes mostly from the small optical cros
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d1c67d379f51e2c3b92d01a7098a564a
https://doi.org/10.1016/s0030-4018(00)00674-x
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2
Multi-band OFDM Transmission with Sub-band Optical Switching
Autor: G. Froc, Alain Poudoullec, N. Nicolas, Mengdi Song, M. Morvan, Y. Jaouen, M. Van der Keur, Philippe Gravey, Julie Karaki, Erwan Pincemin
Publikováno v: ECOC 2013 : 39th European Conference and Exhibition on Optical Communication
ECOC 2013 : 39th European Conference and Exhibition on Optical Communication, Sep 2013, Londres, United Kingdom. pp.1-3, ⟨10.1049/cp.2013.1527⟩
International audience; We show here that coherent dual-polarization multi-band OFDM (DP-MB-OFDM) is a good candidate for long-haul WDM transmission and sub-wavelength optical switching. We demonstrate that optical add-drop of OFDM sub-bands as narro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b39b256fe8a25ccdc8ba7b5399a0f5fb
https://doi.org/10.1049/cp.2013.1527
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3
On the data delivery delay taken by random walks in wireless sensor networks
Autor: G. Froc, Issam Mabrouki, Xavier Lagrange
Publikováno v: Proceedings QEST '08 : 5th International Conference on the Quantitative Evaluation of SysTems
QEST '08 : 5th International Conference on the Quantitative Evaluation of SysTems
QEST '08 : 5th International Conference on the Quantitative Evaluation of SysTems, Sep 2008, Saint Malo, France
QEST
International audience; In recent years, the use of random walk techniques in wireless sensor networks has attracted considerable interest among numerous research efforts. The popularity of this approach is attributed to the natural properties of ran
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68da777e1b2314e2ea146cc2b8824e88
https://hal.archives-ouvertes.fr/hal-02162375/file/4801.pdf
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4
Low Cost Transparent Radio-over-Fibre System for UWB Based Home Network
Autor: Sylvain Meyer, C. Sillans, Anna Pizzinat, Franck Payoux, Benoit Charbonnier, Jean-Luc Polleux, G. Froc, Michel Terre, S. Bories, H. Jaquinot, C. Algani, Y. Le Guennec, Anne-Laure Billabert, I. Louriki
Publikováno v: ECOC
ECOC, Sep 2008, Brussels, Belgium
International audience; We show for the first time the feasibility of a multipoint to multipoint architecture for the distribution of ultra wide band radio signals over multimode fibre with low cost components. In a few years home networks will have
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::383dac26735b3a14cba7dba35e7a008b
https://hal.archives-ouvertes.fr/hal-00907451
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6
Simulation of the photon return of a mono and polychromatic sodium guide star
Autor: V. Michau, E. Rosencher, B. Attal-Trétout, G. Froc, T. K. Gustafson
Publikováno v: Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Edition. CLEO '99. Conference on Lasers and Electro-Optics (IEEE Cat. No.99CH37013).
Summary form only given. Adaptive optics can improve the imaging of ground based telescopes near the diffraction limit in spite of atmospheric turbulence. Laser excitation of the mesospheric sodium layer have been proposed and experimentally investig
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1eea4882b427cd2ecd39c2ab67172c69
https://doi.org/10.1109/cleo.1999.834380
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7
Photoassisted poling, at room temperature, of dye molecules in amorphous films
Autor: M. Dumont, G. Froc, S. Hosotte
Publikováno v: Proceedings of 8th International Symposium on Electrets (ISE 8).
The photoisomerization of some anisotropic molecules modifies their orientational order and induces a macroscopic anisotropy which produces a dichroism and a birefringence. Starting from this well known property, we have demonstrated that the photois
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7f3a32088d4bdbb2eac0dc73edfaed43
https://doi.org/10.1109/ise.1994.515231
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8
Analysis of the photon return of a polychromatic laser guide star
Autor: E. Rosencher, G. Froc, B. Attal-Trétout, V. Michau
Publikováno v: Journal de Physique IV Proceedings
Journal de Physique IV Proceedings, EDP Sciences, 2000, 6èmes Colloque sur les Lasers et l'Optique Quantique, 10 (PR8), pp.Pr8-93. ⟨10.1051/jp4:2000812⟩
The numbers of UV photons detected in a two photon sodium guide star are calculated in different laser excitation regimes. These values are somewhat smaller than the one obtained for monochromatic beacon, This comes mostly from the small optical cros
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2693808750c029f3e4a4fbdda2a80cee
https://hal.archives-ouvertes.fr/hal-03245928
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9
Orientational manipulation of chromophores through photoisomerization
Autor: Sophie Hosotte, Zouheir Sekkat, G. Froc, Michel Dumont
Publikováno v: SPIE Proceedings.
Dye molecules are widely used as optical active dopants in polymer (or sol-gel) films designed for integrated optics. A large effort is made to control the orientation of dye molecules, in order to produce macroscopic anisotropy (permanent and revers
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8f9251c8161c01ad0bd59baa08868fc
https://doi.org/10.1117/12.166297
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10
Photoassisted poling of spiropyrans in polymer films—experiments and theoretical model
Autor: S. Hosotte, G. Froc, M. Dumont, Y. Atassi, K. Nakatani, J. A. Delaire
Publikováno v: 1994 Conference on Lasers and Electro-Optics Europe.
Three years ago, we demonstrated Photo-Assisted Poling1,2 (PAP), a new optical technique for breaking the centrosymmetry of some dye-doped polymer films, in order to induce Second Harmonic Generation (SHG) and Electro-Optic (EO) properties. The first
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::774d0344a5fb3dfae425513a0ca5439a
https://doi.org/10.1364/cleo_europe.1994.cmk4
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