OPTICAL-INTENSITY MODULATION IN A VERTICALLY STACKED COUPLER INCORPORATING ELECTROOPTIC POLYMER

A vertically stacked directional coupler incorporating electro-optic p oled polymer was fabricated by spin coating, photolithography, and rea ctive ion etching processes, based on the fabrication technique used f or polymeric single-mode channel waveguides. Vertically coupled operat ion at 1.3 mum have been achieved between two stacked channels which w ere kept 3.5-5 mum apart by a narrow cladding layer. The intensity mod ulation has been clearly demonstrated in the coupler with electrodes w hen a voltage is applied at 10 kHz between them.