Dominique Pagnoux
Centre national de la recherche scientifique
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Publication
Featured researches published by Dominique Pagnoux.
Measurement Science and Technology | 2006
Minh-Châu Phan Huy; Guillaume Laffont; Yann Frignac; Véronique Dewynter; Pierre Ferdinand; Philippe Roy; Jean-Marc Blondy; Dominique Pagnoux; Wilfried Blanc; Bernard Dussardier
We report results relating to fibre Bragg grating photowriting in two kinds of Ge-doped core microstructured optical fibre devoted to sensing applications. A cross-comparison between theoretical and experimental modal field patterns is carried out. We present the first values of the spectral sensitivity of a Bragg grating in relation to the refractive index of calibrated oils inserted into the holes.
Optics Express | 2006
Minh Châu Phan Huy; Guillaume Laffont; Véronique Dewynter; Pierre Ferdinand; Laurent Labonté; Dominique Pagnoux; Philippe Roy; Wilfried Blanc; Bernard Dussardier
We report what we believe to be the first Tilted short-period Fiber Bragg Grating photowritten in a microstructured optical fiber for refractive index measurement. We investigate the spectral sensitivity of Tilted Fiber Bragg Grating to refractive index liquid inserted into the holes of a multimode microstructured fiber. We measure the wavelength shift of the first four modes experimentally observed when calibrated oils are inserted into the fiber holes, and thus we determine the refractive index resolution for each of these modes. Moreover, a cross comparison between experimental and simulation results of a modal analysis is performed. Two simulation tools are used, respectively based on the localized functions method and on a finite element method. All results are in very good agreement.
Proceedings of SPIE, the International Society for Optical Engineering | 2009
Laurent Labonté; Elio Pone; Maksim Skorobogatiy; Nicolas Godbout; Suzanne Lacroix; Dominique Pagnoux
The origin and the behavior of the birefringence of solid-core air-silica microstructured fibers is described with the help of a simple approximate model. The first two modes of three different types of fibers are studied. Numerical results, obtained from both finite element and boundary integral methods calculations, are presented to support the validity of the model and to delineate its limits.
Journal of Lightwave Technology | 1994
Dominique Pagnoux; Jean-Marc Blondy; P. Di Bin; P. Faugeras; Paul Facq
The spectral analysis of the optical power transmitted through a bow tie slit rotating in the far-field pattern of a single-mode fiber provides an easy and accurate mean of determining the effective cutoff wavelength of the fiber. The principle of this technique is described. Theoretical considerations show that the ratio between the optical powers carried by the LP/sub 11/ mode and the fundamental mode, respectively, is directly related to the amplitude of two particular lines in the spectrum. The degree of coherence of the analyzed field is shown to be related to the amplitude of a third line. Owing to the sensitivity of the method, the detectable amount of the total power which is contained in the LP/sub 11/ mode is as small as 0.5%. The effects of length and curvature on the effective cutoff wavelength are measured over wide ranges for different kinds of single-mode fibers. The behavior of a quadruple-clad flattened dispersion fiber is shown to be somewhat different from that of a typical depressed cladding fiber. >
Optics Communications | 2000
Philippe Leproux; Philippe Roy; Dominique Pagnoux; B Kerrinckx; J. Marcou
By means of a 2D beam propagation method and a very simple and reliable measurements set-up, it is shown that the loss at splices between standard single-mode fibres and Er-doped fibres does not depend on the direction of propagation of light. This conclusion contradicts several previously published assertions in which some important parameters have been neglected.
Optics Communications | 1994
Dominique Pagnoux; Philippe Di Bin; Nicolas Katcharov
Abstract A simple theoretical characterization of modal effects at misaligned connections between non-identical graded-index fibres (hybrid connections) is proposed using rigorous analytical expressions of power transfer coefficients previously established for misaligned homogeneous connections. The characteristics of the homogeneous connection equivalent to a given misaligned hybrid connection are determined.
Proceedings of SPIE, the International Society for Optical Engineering | 2005
M. C. Phan Huy; Guillaume Laffont; Véronique Dewynter-Marty; Pierre Ferdinand; Philippe Roy; Jean-Marc Blondy; Dominique Pagnoux; Wilfried Blanc; Bernard Dussardier
In this paper we present results relative to Fiber Bragg Grating (FBG) photowritten in two kinds of Ge-doped microstructured optical fiber cores devoted to sensing applications. A cross-comparison between theoretical and experimental modal field patterns is carried out. We present the first values of spectral sensitivity of Bragg grating in relation to the refractive index of the substance inserted into the holes.
Optics Communications | 1992
P. Faugeras; Dominique Pagnoux; P. Di Bin; Jean-Marc Blondy
Abstract The measurement of the global losses of multimode connection under single-mode excitation is realized. It leads to the determination of the offset between the fibers in operating connectors. Theoretical and experimental results are in good agreement, and allow precise characterization of multimode connections.
Proceedings of SPIE | 2016
Christophe Louot; Erwan Capitaine; Badr M. Shalaby; Katarzyna Krupa; Alessandro Tonello; Dominique Pagnoux; Claire Lefort; Philippe Leproux; Vincent Couderc
We demonstrate all-normal dispersion supercontinuum generation in the 1080 nm-1600 nm range by propagating subnanosecond pulses in a high numerical aperture standard optical fiber. The extreme saturation of the Raman gain provides a flat spectrum in the considered range, making this broadband source particularly suitable for coherent Raman spectroscopy. This unusual regime of supercontinuum generation (Raman gain saturation regime) is investigated through an experimental spectrotemporal study. The possibility of operating spectrometer-free time-coded coherent Raman spectroscopy is introduced.
conference on lasers and electro optics | 2014
Dominique Pagnoux; Farid El Bassri; Christophe Louot; Vincent Couderc
We present experimental results on microwave assisted Multiplex Coherent Anti-Stokes Raman Spectroscopy (M-CARS) measurements in liquids. The applied nanosecond electric field allows M-CARS signal enhancement and offers potentialities to remove non resonant background.