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.
Original language | English |
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Pages (from-to) | 5112-5114 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 37 |
Issue number | 24 |
DOIs | |
State | Published - 15 Dec 2012 |