Zobrazeno 1 - 10
of 97
pro vyhledávání: '"E. Delevaque"'
Autor:
Wenxiang Xie, J.F. Bayon, E. Delevaque, H. Poignant, Bertrand Poumellec, P. Bernage, Pierre Niay, Marc Douay, B. Leconte, D. Ramecourt
Publikováno v:
Optical Materials. 11:115-129
Photosensitivity designates the ability to permanently change the refractive index of a glass by optical processing. The phenomenon allows the fabrication of numerous phase structures, the simplest of which is the Bragg grating obtained by photoimpri
Autor:
H. Poignant, Marc Douay, E. Delevaque, P. Bernage, Pierre Niay, B. Loisel, J.F. Bayon, Gilbert Martinelli, Yves Quiquempois
Publikováno v:
Optical Materials. 9:361-367
Poling has been achieved in a specially designed germanosilicate fiber. The Ξ(2) susceptibility was detected and measured through refractive index changes measurements using an interferometric method within the fiber. Two methods for poling have bee
Publikováno v:
Optical Fiber Technology. 3:267-271
We propose a new technique for producing UV-induced chirped fiber Bragg gratings for dispersion compensation by using a standard unchirped phase mask. The realization of apodised chirped Bragg gratings with a controlled bandwidth and a linear time de
Publikováno v:
Journal of Lightwave Technology. 15:766-770
We present a simple and efficient model which takes gain stabilization and internal filtering for gain equalization into account. This model allowed the optimization of the filter position in the doped fiber to obtain the best gain stabilization and
Autor:
Patrick Cordier, H. Poignant, Pierre Niay, Pascal Bernage, Marc Douay, Bertrand Poumellec, Wenxiang Xie, E. Delevaque, D. Pureur, T. Taunay, J.F. Bayon
Publikováno v:
Journal of Physics D: Applied Physics. 30:40-52
Bragg grating inscriptions have been performed within strained, high numerical aperture (NA), germania-doped, monomode fibres. It is shown that the complex dynamics of Bragg grating spectrum formation recorded in these fibres depend strongly on the s
Autor:
Liang Dong, Wenxiang Xie, Bertrand Poumellec, T. Taunay, E. Delevaque, Patrick Cordier, J.F. Bayon, H. Poignant, Pascal Bernage, Pierre Niay, Marc Douay
Publikováno v:
Journal of Lightwave Technology. 15:1329-1342
A comprehensive survey of photosensitivity in silica glasses and optical fiber is reviewed. Recent work on understanding the mechanisms contributing to germanium or aluminum doped fiber photosensitivity is discussed within the framework of photoelast
Autor:
Marc Douay, Pierre Niay, J.F. Bayon, W.X. Xie, M. Monerie, Pascal Bernage, E. Delevaque, T. Taunay
Publikováno v:
Optics Communications. 124:295-300
Bragg gratings were written in the core of 0.1 mm thick preform plates doped by high concentration of germanium. The thick holograms were written using either pulsed or continuous UV light for long exposure time. Temporal growth in grating efficiency
Autor:
E. Delevaque, L. Chusseau
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 2:500-507
Femtosecond optical pulses of 110-200-fs width have been produced using a gain-switched distributed-feedback semiconductor laser followed successively by a linear compression stage and a nonlinear compression stage. Analysis is focused on this last s
Autor:
E. Delevaque, Pierre Niay, T. Taunay, H. Poignant, W.X. Xie, Pascal Bernage, M. Monerie, S. Boj
Publikováno v:
Journal of Non-Crystalline Solids. 184:282-285
A holographic method was used to write Bragg gratings in fluorozirconate glass plates or fibres doped by cerium. UV pumping of a cerium transition results in the creation of a permanent change in refractive index of ≈ 2 × 10−5.
Publikováno v:
Journal de Physique III. 5:237-249
The spectral and power characteristics of Nd 3+ doped silica-based fiber lasers utilizing two intracore Bragg grating reflectors have been investigated. The operation of low-threshold, high efficiency Nd 3+ doped fiber lasers are reported. The freque