Investigation of liquid crystal switch on integrated optics with rib waveguides

摘要

In consideration of better confinement of optical field and integration with practical communication network of optical fiber, we proposed a novel vertical $Delta$kappa directional coupler switch with inverted rib waveguides made of nematic liquid crystals (NLCs). Because of the large birefringence of LC's, a very short switching length, about 60 $mu@m, is obtained; furthermore, the high extinction ratio, 25.73 dB, can be achieved in the 3D switch.