| Optical devices based on chalcogenide glasses is the central theme of this thesis. Methods for fabricating both planar and channel optical waveguides are presented. Helium ion implantation has been used to induce channel waveguides in As2S3. Ion implantation has also been employed to dope a planar waveguide with neodymium ions. The observation of the emitted luminescence has demonstrated the efficiency of the technique, which can be used to realize integrated optical amplifiers.;The photosensitivity of As2S3 by exposure to light below the bandgap, has been shown. The process is due to two-photon absorption. The observation of the photosensitivity by two-photon absorption enables the self-writing of a channel waveguide. The process has been studied with a simple model, which takes into account diffraction and the refraction index increase due to two-photon absorption. |
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