Chalcogenide waveguides on a sapphire substrate for mid-IR applications.

We report on the fabrication of arsenic tri-sulfide chalcogenide strip waveguides on a sapphire substrate, suitable for guiding 0.55-5 μm wavelengths. Propagation losses measured using the Fabry-Perot resonator technique are 2.

Liquid crystal high-resolution optically addressed spatial light modulator using a nanodimensional chalcogenide photosensor.

The fabrication and performance of an optically addressed spatial light modulator (OASLM) based on nematic liquid crystal and nanodimensional amorphous arsenic trisulfide (a-As2S3) chalcogenide glassy films are described. The photoconductive a-As2S3 layers are used both as photoalignment material and as a photosensor. The use of the OASLM as a color converter is demonstrated in the transmission mode.

Stimulated Brillouin scattering amplification in centimeter-long directly written chalcogenide waveguides.

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.