On the compositional dependence of refractive index in amorphous Ge x As x Se 1-2x films

[2]) and optical transmission at 1.55 µm, that makes them suitable for photonic applications. Chalcogenide glasses are sensitive to the external illumination and exhibit reversible and irreversible photoinduced effects. These effects are used for fabrication of different registration media, diffractive structures, waveguides, photonic structures, and optical amplifiers [3-6]. The glasses Ge