Thermal poling current and electrooptic evolution were studied for a standard twin-hole fiber and two novel design twin-hole fibers. The poling characteristics were modified in the novel fibers, which had a trap or donor region inside the anode hole. Modifications of the poling characteristics were observed in both the current evolution and the electrooptic evolution. The novel fiber designs can facilitate the tailoring of poled fiber device characteristics.
Paul Blazkiewicz, Wei Xu, Danny Wong, Simon Fleming, and Tom Ryan, "Modification of Thermal Poling Evolution Using Novel Twin-Hole Fibers," J. Lightwave Technol. 19, 1149- (2001)