Vertical tapered mode size transformer in polymer waveguides for efficient fiber coupling

Abstract

Recent years have seen significant progress in photonic devices based on electrooptic (EO) and passive polymers. Recently an EO polymer modulator that works at a record high speed of 113 GHz has been reported(1), and a system demonstration incorporating EO polymer modulators has also been made(2). As polymer waveguide devices are entering fiber optic telecommunication and data communication systems, practical issues concerned by system designers have become increasingly important. One of such issues is the insertion loss of the polymer device.