Optics department

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Non-linear Optics


Our research topics deal with the information and communications technology (ICT), including fiber-based telecommunication systems and fiber sensing technologies, laser physics, nanophotonics, optical metrology, quantum and classical imaging. More specifically, our research group focus on several fields of nonlinear and quantum optics, with the aim of developing potential applications to future ultrafast optical communication systems, novel laser supercontinuum sources, fiber sensors and imaging techniques.

Objectives and research areas

We investigate nonlinear light-matter interactions in many optical materials and waveguides, including photonic crystal fibers, optical nanofibers, chalcogenide glasses, lithium niobate and other nonlinear crystals. Our topics are organized into four main research projects :

› Opto-acoustic interactions in microstructured optical fibers and photonic microwires: In this project, we investigate the fundamental interactions between light and hypersound waves in microstructured optical fibers and in photonic nanowires, with the aim of designing and developing new compact devices for all-optical signal processing and sensing technologies. We have demonstrated new interactions such as the generation of surface acoustic waves in optical microfibers, and shear waves in the core of photonic crystal fibers.

› Supercontinuum generation in specialty optical fibers: In this project, we investigate broadband light supercontinuum (SC) generation from the ultraviolet to mid-infrared regions by exploiting nonlinear effects in silica and chalcogenide based optical fibers. The applications spans from spectroscopy and metrology.

› Information and quantum imaging: the aim of this project is to investigate quantum properties of light in the spatial domain using nonlinear optics in quadratic crystals. We focus in particular on spatial quantum correlations and entanglements in spontaneous parametric down-conversion. Correlations of twin images in both the near and the far fields have recently been demonstrated with a high degree of Einstein-Podolsky-Rosen paradox (EPR).

› Components based on ferroelectric materials (LiNbO3, KTP) and highly nonlinear glasses for optical information processing (frequency conversion, spatial beam reshaping


Our research group conducts both fundamental research on hot scientific topics and applied research with practical applications, including some projects directly linked to current and future needs of photonics industry.

Our group is nationally and internationally recognized for its pioneering investigations on supercontinuum generation and parametric amplification in optical fibers, photon-phonon interactions in photonic crystal fibers, photorefractive solitons, nonlinear quantum imaging and image parametric amplification.

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