A Novel Route to Fibers with Incongruent and Volatile Crystalline Semiconductor Cores: GaAs

A novel extension to the molten core method was employed realize a glass-clad, crystalline gallium arsenide (GaAs) fiber for first time author’s knowledge. GaAs is of considerable interest its optoelectronic and nonlinear properties, but decomposition volatility, usually leading incongruent solidification, normally preclude melt-processing under ambient conditions into an optical fiber. Presented here are results on tin as flux melt at temperature where volatility negligible, permitting thermal drawing long lengths (100 m) GaAs-containing fibers. Laser annealing segregate Sn phases, both across along This work presents important new tool scalable fabrication glass-clad materials previously thought incompatible with processes opens door wide range useful in-fiber devices.