This chapter contains sections titled: Introduction Chalcogenide Glasses for Near-Infrared (NIR) Optics Bulk Chalcogenide Glasses (ChG): Composition and Optical Properties Chalcogenide Thin Films and Comparison with Bulk Glass Structural Characterization of Chalcogenide Glasses Raman Spectroscopy NIR Raman Spectroscopy of Bulk Chalcogenide Glasses NIR Waveguide and Micro-Raman Spectroscopy of Chalcogenide Films Photo-Induced Changes in Glassy Chalcogenides Exposure Sensitivity of Chalcogenide Glasses Photo-Induced Waveguides in Bulk ChG Materials Photo-Induced Changes in ChG Films Grating Fabrication in As2S3 Glassy Films Conclusions and Outlook References