Research Topics

Central research themes

  • Brillouin scattering
  • Coherent fiber laser
  • Light sound interaction at the nanoscale
  • Supercontinuum generation
  • Fabrication of silica optical nanofibers
  • Nanofiber handling and preservation
  • Characterization of mechanical and optical properties
  • Light spectroscopy
  • Sensing
  • Distributed temperature sensor for hydrogeology

Design, Fabrication, characterization and packaging of tapered optical fiber (nanofibers) 

Optical microfibers and nanofibers, manufactured by tapering standard optical fibers down to a few hundred nanometers, are being widely used in many applications ranging from quantum and ultra-cold atom optics to optical sensing. Since 2015, we taper optical fiber and we developed different experiment to characterize the dimensions, the dimensions and optical properties.

Selected Publications

F. Yang, F. Gyger, A. Godet, J. Chrétien, L. Zhang, M.Pang, J-C. Beugnot, L. Thévenaz, "Large evanescently-induced Brillouin scattering at the surrounding of a nanofibre", Nature Communication, 13 (1), p. 1-8 2022.

A. Godet, T. Sylvestre, V. Pêcheur, J. Chrétien, J-C. Beugnot, and K. Phan Huy "Nonlinear elasticity of silica nanofiber," APL Photonics Vol. 4, 080804, 2019.

A. Godet, A. Ndao, T. Sylvestre, V. Pecheur, S. Lebrun, G. Pauliat, J-C. Beugnot, and K. Phan Huy,
Brillouin spectroscopy of optical microfibers and nanofibers,” Optica Vol. 4, p. 1232-1238, 2017.

J-C. Beugnot, S. Lebrun, G. Pauliat, V. Laude, H. Maillotte and T. Sylvestre, “Brillouin light scattering from surface acoustic waves in photonic  microwires,” Nature Communications 5, 5242, 2014,.

Modelisation of light sound interaction in optical waveguide

Joël Cabrel Tchahame, Jean-Charles Beugnot, Kien Phan Huy, Vincent Laude, Alexandre Kudlinski, and Thibaut Sylvestre, "Surface Brillouin scattering in photonic crystal fibers," Opt. Lett. 41, 3269-3272, 2016.

V. Laude & J-C. Beugnot "Lagrangian description of Brillouin scattering and electrostriction in nanoscale optical waveguides,"
New Journal of Physics, 17, 125003, 2015.

Y. Pennec, V. Laude, N. Papanikolaou, B. Djafari-Rouhani, M. Oudich, S. El Jallal, J-C. Beugnot, J. M. Escalante, A. Martinez "Modeling light-sound interaction in nanoscale cavities and waveguides," Nanophotonics, 3(6), 2014.

J-C. Beugnot and V. Laude, “Electrostriction and guidance of acoustic phonons optical fiber,” Physical Review B Vol 86, 224304, 2012.

Application of Brillouin scattering for optical fiber sensor and coherent laser

A. Godet, J. Chretien, K. P. Huy, J-C. Beugnot, "Micronewton nanofiber force sensor using Brillouin scattering," Optics Express, 30(2), p. 815-824. 2022.

M. Deroh, T. Sylvestre, J. Chrétien, H. Maillotte, B. Kibler and J-C. Beugnot "Towards athermal Brillouin strain sensing based on heavily germania-doped core optical fibers," APL Photonics Vol. 4, 030801, 2019.

J-C. Beugnot, M. Tur, S. M. Foaleng, and L. Thévenaz, "Distributed Brillouin sensing with sub-meter spatial resolution: modeling and processing," Opt. Express 19, 7381-7397, 2011.

S. M. Foaleng, M. Tur, J-C. Beugnot, and L. Thévenaz, "High Spatial and Spectral Resolution Long-Range Sensing Using Brillouin Echoes," J. Lightwave Technol. 28, 2993-3003,  2010.

Nonlinear photonics,

Y. Haddad, J. Chretien, J-C. Beugnot, A. Godet, K. P. Huy, S. Margueron and G. Fanjoux, "Microscopic imaging along tapered optical fibers by right-angle Rayleigh light scattering in linear and nonlinear regime", Optics Express, vol. 29, 24, pp. 39159-39172, 2021.

M. Bouhadida, J-C. Beugnot, P. Delaye, K. P. Huy and S. Lebrun "Highly efficient and reproducible evanescent Raman converters based on a silica nanofiber immersed in a liquid," Applied Physics B - Laser and Optics, Vol. 12 pp. 228, 2019. 

G. Fanjoux, J. Chrétien, A. Godet, K. Phan-Huy, J-C. Beugnot and T. Sylvestre "Demonstration of the evanescent Kerr effect in optical nanofibers," Opt. Express Vol. 27, 29460-29470, 2019.