Optimisation de la génération d'un continuum cohérent dans une fibre à dispersion normale et à haute non-linéarité

International audience; Nous étudions la génération d'un supercontinuum cohérent dans une fibre optique non-linéaire à dispersion normale aux longueurs d'onde des télécommunications optiques.

CSRZ-ASK and DPSK 40Gb/s All-Raman WDM Transmission Based on UltraWaveTM Fiber

International audience

Advanced modulation formats for the next generation of 40 Gb/s, WDM terrestrial all-optical european fiber networks

International audience

Nonlinear dynamics of parabolic pulse solutions to the dissipative Whitham equations and applications to supercontinuum guided wave light sources

Coherent Amplification of the Short Optical Pulse in a Non-linear Birefringent Medium

International audience; The propagation of the solitary waves in the resonant birefringent amplifier with linear losses is considered. The birefringent optical linear medium contains two-level atoms with the upper state degenerated over projection of angular moment. It is assumed that population of resonance levels of atoms is inverted. The steady state pulse of polarized radiation that is vectorial generalization of the known pi-pulse was analytically found. Numerical simulations demonstrate the formation dynamics solitary waves originated in birefringent amplifier.

Mélange à quatre photons dans les fibres optiques micro-structurées à haute biréfringence

National audience

Signal processing in photonic crystals and nanostructures

International audience; Optical devices employing photonic crystals and novel nanostructure materials may exhibit useful properties for applications to all-optical signal processing. In this work we analyze as a first example four-wave mixing of polarized beams in photonic crystal fibers. We show that by properly tuning the pump wavelength and the linear dispersion properties of the fiber one may obtain broadband parametric amplification and frequency conversion. Next we consider the in-line periodic amplification of short optical pulses by means of quantum-dot semiconductor optical amplifiers. We show by numerical simulations that pattern-free amplification of a 40 Gbit/s soliton signal at…