Versatile supercontinuum generation by using χ(2) and χ(3) nonlinearities in PPLN crystal for direct multiplex CARS measurement

Sahar Wehbi, Tigran Mansuryan, Raphael Jauberteau, Alessandro Tonello, Katarzyna Krupa, Stefan Wabnitz, Hideaki Kano, Philippe Leproux, Sebastien Vergnole, Vincent Couderc

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this study, we report on experiments of spatio-temporal nonlinear frequency conversion in a periodically poled Lithium Niobate (PPLN) crystal designed for second-harmonic generation (SHG). We demonstrated a novel supercontinuum source based on the mixing of second and third-order nonlinearities. We could adjust the (χ(2), χ(3)) nonlinearities by controlling the input laser polarization orientation, the pulse duration and the PPLN crystal temperature. We obtained an ultra-broadband spectrum, ranging from visible to infrared domains, by pumping a 20-mm-long PPLN crystal with a 3 ps pulse at 1030 nm. This broadband pulse was used to achieve direct multiplex Coherent Anti-Stokes Raman Scattering (M-CARS) imaging, without the need for any optical delay line to temporally synchronize the pump and the Stokes waves. Simultaneous vibrational signatures ranging from -3200 cm-1 to -500 cm-1 were obtained. Several filters were placed on the broadband supercontinuum path, to shape the output spectrum between 1030 nm and 1650 nm, before sending it into the microscope. The output spectral analysis allows for the demonstration of multimodal imaging, by using SHG, M-CARS and multiphoton fluorescence processes.

Original languageEnglish
Title of host publicationNonlinear Optics and Applications XII
EditorsMario Bertolotti, Anatoly V. Zayats, Alexei M. Zheltikov
ISBN (Electronic)9781510643741
Publication statusPublished - 2021
EventNonlinear Optics and Applications XII 2021 - Virtual, Online, Czech Republic
Duration: Apr 19 2021Apr 23 2021

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceNonlinear Optics and Applications XII 2021
Country/TerritoryCzech Republic
CityVirtual, Online

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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