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TOM Fibers S4: Optical Non Linearities
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8:30am - 9:00am
INVITED Far-detuned intramodal FWM in optical micro-fiber tuneable with the micro-fiber diameter 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 - 9:15am
Study of Brillouin scattering in nanofiber gas cell 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 9:15am - 9:30am
Evanescent stimulated Raman scattering in benzene-immersed fluorophosphate optical nanofibers 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. 9:30am - 9:45am
Generalized Heterodyne Interferometry in Kerr Materials 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. | ||