Exact solution to the electric field of the double-sided electrode structure in a lead lanthanum zirconated titanate transverse electro-optic modulator

Analytical expressions for the electric field and the capacitance of a double-sided electrode structure are derived by the conformal-mapping method. A clear picture of the electric field is given for an analysis of the quadratic electro-optic effect in a lead lanthanum zirconated titanate transverse modulator. The excess birefringence in the region near the edge of the electrodes causes a reduction of the nonuniformity in the intensity modulation of a double-sided electrode structure compared with that of single-sided electrodes; this reduction is calculated. (C) 1996 Optical Society of America.