Title :
Large electrooptic modulation in a thermally-poled germanosilicate fiber
Author :
Fujiwara, T. ; Wong, D. ; Fleming, S.
Author_Institution :
Optical Fibre Technol. Centre, Sydney Univ., NSW, Australia
Abstract :
A large linear electro-optic phase shift observed in a germanosilicate fiber has been induced by thermal poling at about 250/spl deg/C for 20-60 min with an electric field of >8/spl times/10/sup 5/ V/cm and a 3.3-cm electrode length. Polarization dependence of the V/sub /spl pi//L product in a birefringent germanosilicate fiber has been found, and the lowest V/sub /spl pi//L product has been measured for TE-polarization of 224 V/cm at 633 nm. Furthermore, it has been found that the electrical resistance between the electrodes is reduced by thermal poling.<>
Keywords :
birefringence; dielectric polarisation; electric fields; electric resistance; electro-optical modulation; electrodes; germanate glasses; optical fibre polarisation; 20 to 60 min; 250 C; 3.3 cm; 633 nm; SiO/sub 2/-GeO/sub 2/; TE-polarization; birefringent germanosilicate fiber; electric field; electrical resistance; electrode length; electrodes; large electrooptic modulation; large linear electro-optic phase shift; lowest V/sub /spl pi//L product; polarization dependence; thermal poling; thermally-poled germanosilicate fiber; Australia; Electrodes; Electrooptic modulators; Electrooptical waveguides; Optical fiber devices; Optical fiber polarization; Optical fibers; Optical materials; Silicon compounds; Thermal resistance;
Journal_Title :
Photonics Technology Letters, IEEE
