Supercontinuum Generation

The propagation of an intense and short pulse in an optical fiber or waveguide can lead to massive spectral broadening of the initial pulse as a result of cascaded nonlinear light-matter interactions. These effects can be efficiently harnessed and applied to the generation of light source with an ultra-broadband supercontinuum spectrum. Supercontinuum light sources often referred to as white-light lasers have unique properties in terms of brightness, coherence and wavelength coverage.

Caustics of a supercontinuum

They have had major impact in many research fields in the past two decades ranging from precision metrology, ultrafast spectroscopy, and the calibration of astro-combs, to high resolution imaging, LIDAR technologies, and the generation of ultrastable microwave signals. Our group has a long history of research into the modelling, development and applications of supercontinuum light sources. Recently, our research have focused onto high-power mid-infrared supercontinuum studies in multimode soft-glass fibers and gradient-index fibers. We are also developing supercontiuum sources for applications in optical imaging, sensing and spectroscopy.

[1] J.M. Dudley, G. Genty, S. Coen, Rev. Mod. Phys. 78(4), 1135-1184 (2006). link

[2] Eslami, Z., Salmela, L., Filipkowski, A. et al. Two octave supercontinuum generation in a non-silica graded-index multimode fiber. Nat Commun 13, 2126 (2022). link

[3] Abba Saleh, Piotr Ryczkowski, Goery Genty, and Juha Toivonen, “Supercontinuum lidar for industrial process analysis,” Opt. Express 29, 42082-42089 (2021) link