Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Monnom, Gérard"'
Publikováno v:
Optical Materials 16 (2001) 269-277
We have made chromium-doped, silica-based preforms and optical fibres by Modified Chemical Vapour Deposition and have studied the influence of the chemical composition of the doped region on the Cr-oxidation states and the spectroscopic properties of
Externí odkaz:
http://arxiv.org/abs/1303.3835
Autor:
Shen, Y. H., Pal, S., Mandal, J., Sun, T., Grattan, K. T. V., Wade, S. A., Collins, Stephen F., Baxter, Gregory W., Dussardier, Bernard, Monnom, Gérard
Publikováno v:
Optics Communications 237, 4-6 (2004) 301-308
Three different types of Er doped photosensitive fibers, germanium/erbium (Ge/Er) fiber, tin/germanium/erbium fiber (Sn/Er) and antimony/germanium/erbium fiber (Sb/Er) have been manufactured and studied for use in optical sensor systems. Their charac
Externí odkaz:
http://arxiv.org/abs/1111.7306
Autor:
Dussardier, Bernard, Trzesien, Stanislaw, Ude, Michèle, Rastogi, Vipul, Kumar, Ajeet, Monnom, Gérard
Publikováno v:
9th International Conference on Fiber Optics and Photonics, Delhi : India (2008)
A large mode area single-mode optical fibre based on leaky mode filtering was prepared by MCVD. The cladding structure discriminates the fundamental mode from the higher order ones. A preliminary version has 25-$\mu$m core diameter and 0.11 numerical
Externí odkaz:
http://arxiv.org/abs/1102.1282
Autor:
Dussardier, Bernard, Blanc, Wilfried, Mauroy, Valérie, Ude, Michèle, Trzesien, Stanislaw, Mady, Franck, Benabdesselam, Mourad, Monnom, Gérard
An efficient method to fabricate transparent glass ceramic fibers containing in-situ grown Er3+-doped oxide nanoparticles is presented. Characterization of the drawn fibers exhibits low loss (0.4 dB/m) and broadened Er3+ emission spectrum. This attra
Externí odkaz:
http://arxiv.org/abs/1101.2814
Autor:
Simpson, David A., Baxter, Gregory W., Collins, Stephen F., Gibbs, W. E. K., Blanc, Wilfried, Dussardier, Bernard, Monnom, Gérard
Publikováno v:
Journal of Non-Crystalline Solids 352 (2005) 136-141
A study of the mechanisms responsible for the infra-red to near infra-red up-conversion in Tm3+-doped silica fibers is presented. Upconversion luminescence was observed from the 3H4 level of Tm3+ under 1586 nm pumping into the 3F4 level. The quadrati
Externí odkaz:
http://arxiv.org/abs/1004.1013
Publikováno v:
Journal of Optics (2010) J. Opt. 12 (2010) 065705 (4pp)
We analyse a multilayer leaky cladding (MLC) fibre using the finite element method and study the effect of the MLC on the bending loss and birefringence of two types of structures: (i) a circular core large-mode-area structure and (ii) an elliptical-
Externí odkaz:
http://arxiv.org/abs/1003.3743
Publikováno v:
Journal of Non-Crystalline Solids 353 (2007) 2767?2773
The role of some glass network modifiers on the quantum efficiency of the near-infrared fluorescence from the 3H4 level of Tm3+ ion in silica-based doped fibres is studied. Modifications of the core composition affect the spectroscopic properties of
Externí odkaz:
http://arxiv.org/abs/1003.0166
Autor:
Nagaraju, B., Paul, M. C., Pal, M., Pal, A., Varshney, Ravi K., Pal, B. P., Bhadra, S. K., Monnom, Gérard, Dussardier, Bernard
Publikováno v:
Optics Communications 282, 12 (2009) 2335-2338
We report design and subsequent fabrication of an intrinsically gain flattened Erbium doped fiber amplifier (EDFA) based on a highly asymmetrical and concentric dual-core fiber, inner core of which was only partially doped. Phase-resonant optical cou
Externí odkaz:
http://arxiv.org/abs/0911.3960
Publikováno v:
Fiber and Integrated Optics 27, 6 (2008) 484-504
We present some of our research activities dedicated to doped silica-based optical fibers, aiming at understanding the spectral properties of luminescent ions, such as rare-earth and transition metal elements. The influence of the local environment o
Externí odkaz:
http://arxiv.org/abs/0911.1683
Visible and near infra-red up-conversion in Tm3+/Yb3+ co-doped silica fibres under 980 nm excitation
Autor:
Simpson, David A., Gibbs, Keith W. E., Collins, Stephen F., Blanc, Wilfried, Dussardier, Bernard, Monnom, Gérard, Peterka, Pavel, Baxter, Gregory W.
Publikováno v:
Optics express 16, 18 (2008) 13781-13799
The spectroscopic properties of Tm3+/Yb3+ co-doped silica fibers under excitation at 980 nm are reported. Three distinct up-conversion fluorescence bands were observed in the visible to near infra-red regions. The blue and red fluorescence bands at 4
Externí odkaz:
http://arxiv.org/abs/0809.0229