Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Gérard Monnom"'
Autor:
Gérard Monnom, Bernard Dussardier, W.E.K. Gibbs, Gregory W Baxter, Wilfried Blanc, David Simpson, Stephen F Collins
Publikováno v:
Journal of Non-Crystalline Solids
Journal of Non-Crystalline Solids, Elsevier, 2005, 352, pp.136-141
Journal of Non-Crystalline Solids, Elsevier, 2005, 352, pp.136-141
International audience; 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
Autor:
Andreas T. Augousti, Bernard Dussardier, Scott A Wade, Gérard Monnom, Kenneth T. V. Grattan, Gregory W Baxter, Stephen F Collins, Tong Sun, Jharna Mandal
Publikováno v:
Measurement Science and Technology. 15:1113-1119
A fibre laser sensor has been developed to operate over a wide temperature range from room temperature to 440 °C, where the laser cavity has been formed using a combination of a chirped grating and a type IIA fibre Bragg grating (FBG), enclosing a l
Autor:
Bernard Dussardier, Kenneth T. V. Grattan, Gregory W Baxter, Suchandan Pal, Scott A Wade, Gérard Monnom, Tong Sun, Stephen F Collins
Publikováno v:
Review of Scientific Instruments. 75:1327-1331
A simple and effective technique for strain-independent temperature measurement has been demonstrated using the peak wavelengths of both type-I and type-IIA fiber Bragg gratings written without hydrogen loading in the same fiber, this having been spe
Autor:
Bernard Dussardier, Gregory W Baxter, Stephen F Collins, Scott A Wade, Tong Sun, Suchandan Pal, Gérard Monnom, Kenneth T. V. Grattan
Publikováno v:
Sensors and Actuators A: Physical. 112:211-219
Temperature measurements have been made by using fibre Bragg gratings (FBGs) written in a range of fibres and detailed data on their characteristics are presented. The data are fitted to polynomials that may be used in the calibration of temperature
Publikováno v:
Review of Scientific Instruments. 72:3180-3185
The effect of strain upon the fluorescence intensity ratio technique of optical fiber based temperature sensing has been investigated using a series of different Yb3+- and Nd3+-doped optical fibers. Measurements were conducted with each of the doped
Publikováno v:
Fiber and Integrated Optics. 20:221-229
Wavelength tunability of an Er 3+ -doped fiber laser is reported by the use of an integrated optics Mach-Zehnder interferometer driven electro-optically. A pump laser threshold of 5 mW and a continuous tunable band from 1530 nm to 1554 nm are achieve
Publikováno v:
Optical Materials
Optical Materials, Elsevier, 2001, 16, pp.269-277
Optical Materials, Elsevier, 2001, 16, pp.269-277
We have made chromium-doped, silica-based preforms and optical fibres by modified chemical vapour deposition (MCVD) and have studied the influence of the chemical composition of the doped region on the Cr-oxidation states and the spectroscopic proper
Autor:
M Clapeau, Bernard Dussardier, Gérard Monnom, Jean-Louis Auguste, Jean-Marc Blondy, J. Marcou, Rajeev Jindal
Publikováno v:
Optics Communications. 178:71-77
In this paper, we present the simulation results, using a cylindrical coordinates beam propagation method, of the effect of the central index dip in an optical fibre with high negative chromatic dispersion at 1.55 μm. This leads to the definition of
Publikováno v:
The European Physical Journal Applied Physics. 6:225-228
We show theoretically and experimentally that the wavelength tunability of an Er 3+ –doped fiber laser is improved by using a twofold filter combining a Mach-Zehnder interferometer and a polarimetric filter. This new filter allows us to tune contin
Autor:
Basile Faure, Vlastimil Matějec, Gérard Monnom, Ivan Kašík, Václav Kubeček, Wilfried Blanc, Pavel Peterka, Bernard Dussardier
Publikováno v:
Optical Materials
Optical Materials, Elsevier, 2007, 30 (1), pp.174-176. ⟨10.1016/j.optmat.2006.11.039⟩
Optical Materials, Elsevier, 2007, 30 (1), pp.174-176. ⟨10.1016/j.optmat.2006.11.039⟩
We present preparation and spectroscopic characterization of thulium-doped fibers with enhanced 3H4 fluorescence lifetime obtained by codoping with alumina. With an alumina content of 10 mol%, a fluorescence lifetime of 58 μs is achieved. For the fi