0000000000522008
AUTHOR
Thanh Nam Nguyen
Numerical study of an optical regenerator exploiting self-phase modulation and spectral offset filtering at 40 Gbit/s
Topic: Nonlinear optics; International audience; In this work, we numerically investigate the performances of optical regenerators based on self-phase modulation and spectral offset filtering at 40 Gbit/s. We outline the different effects affecting the device performances and explain the choice of the optimal working power. The impact of the regenerator on the output signal is also analysed through a statistical approach. Both single- and double-stage configurations are investigated.
A fiber based limiter at 170 Gbit/s for all-optical regeneration
International audience
Fourth order cascaded Raman shift in As38Se62 chalcogenide suspended core fiber pumped at 1.995 μm
Fourth order cascaded Raman wavelength shift is demonstrated in As 38 Se 62 suspended core fiber using 1995 nm nanosecond source. The measured Raman gain coefficient is∼2×10−11 m/W at 1995 nm. The Raman peaks are reproduced by numerical simulations.
Chalcogenide Microstructured Fibers for Infrared Systems, Elaboration, Modelization, and Characterization
special issue " Fiber Optic Research in France " (Part III of III); International audience; Chalcogenide fibers present numerous possible applications in the IR field. For many applications, single mode fibers must be obtained. An original way is the realization of microstructured optical fibers (MOFs) with solid core. These fibers present a broad range of optical properties thanks to the high number of freedom degrees of their geometrical structure. In this context, we have developed MOFs for near and mid IR transmission with different geometries and properties such as multimode or endless single-mode operation, small or large mode area fibers. We have also investigated numerically the mai…
Self-phase modulation-based 2R regenerator including pulse compression and offset filtering for 42.6 Gbit/s RZ-33% transmission systems
International audience; We report on the experimental and theoretical study of a self-phase-modulation-based regenerator at 42.6 Gbit/s with a return-to-zero 33% format. We point out some detrimental effects such as intrachannel interactions and Brillouin scattering. An efficient solution, relying on a self-phase-modulation-based pulse compressor in combination with the regenerator, is proposed to overcome these detrimental phenomena. The experimental demonstration shows the effectiveness of a wavelength-transparent regenerator at 42.6 Gbit/s with a sensitivity-improvement of more than 5 dB and an eye-opening improvement of 2.3 dB in a back-to-back configuration, as well as a 10 times maxim…
A fiber-based limiter at 170 Gbit/s for all-optical regeneration
We report the numerical and experimental studies of a spectrally filtered fiber-based optical limiter at 170 Gbit/s. The device, including less than 1 km-long of highly nonlinear optical fiber and a 3 nm-width filter, exhibits good performance at an average input power of 14.5 dBm. No power penalty has been observed and a strong robustness against optical noise has been demonstrated.
Nonlinear Characterisation of an AsSe Chalcogenide Holey Fiber
oral session TuA " Highly Nonlinear Fibers " [TuA1]; International audience; We report the nonlinear characterization of a chalcogenide holey fiber, based on the AsSe glass composition. A nonlinear coefficient as high as 15 000 W-1 km-1 has been measured.
Fiber-based optical functions for high-bit-rate transmissions
oral
Caractérisation d'une fibre optique ultra non-linéaire en verre de chalcogénure
session orale 3 « Effets nonlinéaires » [Ma1.4], http://optiquelille2009.univ-lille1.fr/; National audience; Nous présentons les résultats expérimentaux concernant la caractérisation d'une fibre optique microstructurée en verre de chalcogénure de composition AsSe. Ces mesures concernent l'atténuation, la dispersion, l'aire effective et le coefficient non-linéaire du troisième ordre. Cette fibre présente un fort potentiel pour des applications non-linéaires avec un coefficient non-linéaire Kerr de 15 400 W-1m-1.
Recent advances in the development of chalcogenide photonic crystal fibers.
International audience
Caractérisation théorique du régénérateur 2R exploitant l'automodulation de phase dans une fibre optique
National audience; Nous étudions théoriquement un régénérateur 2R exploitant l'automodulation de phase dans une fibre optique, suivie d'un filtrage spectral décalé en fréquence. Nous utilisons deux approches différentes mais complémentaires : l'approche « fonction de transfert » et l'approche « amélioration du facteur Q ». Nous mettons notamment en évidence l'impact de la gigue temporelle pour expliquer un désaccord entre les deux approches.
Elaboration and characterizations of solid core and holow core microstructured chalcogenide fibers
Symposium 25 " Glasses for Optoelectronic and Optical Applications ", Session " Glass Fibers " [PACRIM8-S25-039-2009]; International audience
Casting process for manufacturing a low loss chalcogenide photonic crystal fiber
International audience
Fourth-order cascaded Raman shift in AsSe chalcogenide suspended-core fiber pumped at 2 μm
International audience; Cascaded Raman wavelength shifting up to the fourth order ranging from 2092 to 2450nm is demonstrated using a nanosecond pump at 1995nm in a low-loss As38Se62 suspended-core microstructured fiber. These four Stokes shifts are obtained with a low peak power of 11W, and only 3W are required to obtain three shifts. The Raman gain coefficient for the fiber is estimated to (1.6 +-0.5)x 10e−11 m/W at 1995nm. The positions and the amplitudes of the Raman peaks are well reproduced by the numerical simulations of the nonlinear propagation.
Recent advances in chalcogenide holey fibres
oral
Chalcogenide microstructured optical fibers : from linear to nonlinear properties
International audience; In this talk, we review the linear properties of chalcogenide microstructured optical fibers (MOFs) of several types. We mainly focus our talk on mid-infrared applications of such fibers. We start with the general properties of solid core MOFs made of these high index glasses and compare them with the ones of silica. Then, we give some details concerning a solid core MOF made of TAS glass. Next, we describe the first guiding suspended chalcogenide MOF and explain how it was designed for supercontinuum generation in the mid-infrared. Both linear and nonlinear properties of As2S3 suspended core MOFs are also numerically studied. In the next part, We describe the design…