OPTICAL DEVICE

摘要

The present invention provides an optical device comprising first, second, and third waveguides coupled together at an asymmetric X-junction. In a preferred embodiment, the first waveguide has a first width and is coupled to a side of an asymmetric X-junction; the second waveguide is coupled to the first waveguide at the side of the asymmetric X-junction and has a second width less than the first width; and the third waveguide is coupled to the first and second waveguides at the side of the asymmetric X-junction and has a third width that is less than the first width. The present invention further provides an optical transmitter and a method of manufacturing the optical device.