Effect of annealing on creation of second-order nonlinearity in twin-hole optical fibre of pure silica
作者： H. An , S. Fleming
DOI: 10.1049/EL:20071285
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摘要: The effect of thermal pre-annealing on the creation second-order nonlinearity in a pure twin-hole optical fibre thermally poled at 3.5 kV and 280°C for 30 min has been investigated. In unannealed as-drawn fibres, SON ∼ 0.18 pm/V was induced core-cladding interface. showed little polarisation dependence. fibres pre-annealed 400°C 3 h, smaller, decreasing to 0.09 magnitude. 800°C no detectable found Electron-migration along connected existing defects interface postulated be responsible frozenin space-charge field that generated effective observed. Thermal annealing is proposed have caused defect-annihilation, which resulted smaller SON.
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