8:30am - 9:00amINVITEDFar-detuned intramodal FWM in optical micro-fiber tuneable with the micro-fiber diameter
Gil Fanjoux, Maxime Zerbib, Romain Morel, Kien Phan-Huy, Thibaut Sylvestre, Jean-Charles Beugnot
FEMTO-ST institute, France
We report a theoretical and experimental investigation of far-detuned intramodal (FWM) in the fundamental mode of optical microfibers (OMF) depending on their diameter. We demonstrate that the signal wavelength can be tuned over a wide spectral range simply by varying the OMF diameter. Using a pump at 1064 nm, signal wavelengths ranging from around 750 to 950 nm are generating by adjusting the OMF diameter from approximately 8.5 to 6.5 µm.
9:00am - 9:15amOptimizing Kerr nonlinearity in tapered optical nanofibers through nonlinear liquid immersion
Oussama Laouedj1, Abderrahim Azzoune1, Hamza Gouasmia1, Hocine Medjadba1, Sylvie Lebrun2
1Ecole Militaire Polytechnique, BP17, Bordj-El-Bahri, Algiers 16111, Algeria; 2Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France
This work aims to optimize the Kerr effect in optical nanofibers made from various glass materials with refractive indices close to that of silica and immersed in acetone. Key factors considered include the nanofiber diameter, the optical properties of the core material, and the effective area of the fundamental HE11 mode, both within the core and in the surrounding medium. The study highlights the influence of these parameters on enhancing the nonlinear optical response through the evanescent field.
9:15am - 9:30amStudy of Brillouin scattering in nanofiber gas cell
Simon Colombel, Maxime Zerbib, Philippe Boyer, Jérôme Salvi, Jean-Charles Beugnot
Université Marie et Louis Pasteur, Institut FEMTO-ST, UMR CNRS 6174, Besançon, France
We present numerical calculations and experimental measurements of Brillouin scattering efficiency in a nanofiber gas cell. The results demonstrate highly efficient nonlinear conversion within the nanofiber gas cell
9:30am - 9:45amEvanescent stimulated Raman scattering in benzene-immersed fluorophosphate optical nanofibers
Hamza Gouasmia1, Abderrahim Azzoune1, Oussama Laouedj1, Hocine Medjadba1, Abdelmadjid Maali1, Sylvie Lebrun2
1Ecole Militaire Polytechnique, BP17, Bordj-El-Bahri, Algiers 16111, Algeria; 2Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, 91127, Palaiseau, France
Optical nanofibers (ONFs) made from fluorophosphate glass (OHARA - FPM) enable strong confinement, low losses, and enhanced evanescent fields for nonlinear optics. We show that the HE11 mode achieves high Raman gain (11.62 m−1·W−1) in a compact 10 cm ONF with a 300 nm radius. These results optimize ONF fabrication, lower the Raman threshold, and expand the Raman effect’s operational range.
9:45am - 10:00amGeneralized Heterodyne Interferometry in Kerr Materials
Arnaud Rogemont, Charles Pourny, Aurelien Coillet, Benoit Cluzel
Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-UB, 9 avenue Alain Savary, 21000 DIJON, France
Interferometry has long been used to measure the phase of light signals. Combined with a heterodyne detection scheme, it allows to simultaneously and unambiguously record amplitude and phase variations. In this work, we exploit these well-known techniques to evaluate the nonlinear phase induced by the optical Kerr effect during the propagation of a laser pulse in a nonlinear medium. We show that the nonlinear index can easily be retrieved when the accumulated phase remains small, but counter-intuitive results can be observed at higher powers.
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