RESONANT AND NONRESONANT EFFECTS IN PHOTONIC GLASSES

Over the past ten years, a large amount of research has been done inve stigating materials, both glasses and polymers, which exhibit large no n-linear susceptibilities, chi(3). The measured chi(3) for a wide rang e of inorganic glasses are presented and discussed in terms of chemica l composition. The experimental results from a single mode fiber with a large non-resonant chi(3) are presented. An argument is made for the choice of the non-resonant non-linear effect in cylindrical optical w aveguides as the most practical route toward the realization of device s utilizing non-linear interactions. The argument takes into account v arious aspects that influence device performance other than the magnit ude of chi(3) alone. A brief discussion of the resonant non-linear phe nomena derived from band-filling in semiconductor doped glasses and th e photorefractive effect in SiO2-GeO2 waveguide materials is included for comparison.