title: Stimulated Brillouin scattering amplification in centimeter-long directly written chalcogenide waveguides.
abstract: Stimulated Brillouin scattering (SBS) amplification is obtained in directly written As2S3 channel waveguides. Centimeter-long waveguides were written using a Ti:sapphire femtosecond laser, operating at a central wavelength of 810 nm. The cross-section of the waveguides was of 4  μm×1  μm. A Brillouin frequency shift of 7.5 GHz is observed, in general agreement with corresponding previous studies. The SBS gain spectrum in the short waveguides is comparatively broad, with a full width at half-maximum of 200 MHz. We attribute the broad linewidth to the spatial evolution of the electromagnetic field profile along the waveguide.
authors.affiliation: Faculty of Engineering, Bar-Ilan University, Ramat-Gan 52900, Israel.
authors.forename: Shahar
authors.initials: S
authors.lastname: Levy
authors.forename: Victor
authors.initials: V
authors.lastname: Lyubin
authors.forename: Matvei
authors.initials: M
authors.lastname: Klebanov
authors.forename: Jacob
authors.initials: J
authors.lastname: Scheuer
authors.forename: Avi
authors.initials: A
authors.lastname: Zadok