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Fluoride And Phosphate Glass Whispering Gallery Micro-Resonators, Jonathan Ward
Fluoride And Phosphate Glass Whispering Gallery Micro-Resonators, Jonathan Ward
Theses
This PhD work focuses on spherical microlasers made from commercial and experimental laser glasses. The laser light in a microsphere is confined in a region called a whispering gallery mode, which has unique properties that allow for many nonlinear effects to be observed with only sub-mW pump powers. Efficient coupling of light into the microsphere is attained by using adiabatically tapered fibres fabricated using various heating methods including a CO2 laser, a sapphire tube furnace and electric heaters. However, the best result is obtained using a fibre pulling rig with an oxy-butane torch as the heat source. This system …