OPTICAL DEVICE HAVING OPTICAL POWER LOSS REDUCING REGION NEAR WAVEGUIDE AND METHOD THEREOF

An optical device having optical power loss reducing region near optical waveguide and a manufacturing method thereof are provided to secure enough optical output in a device of identical length by reducing optical power loss generated by a bending of an optical waveguide. An optical device having optical power loss reducing region near optical waveguide comprises an optical waveguide(103) and one or more optical power loss reducing region(106). The optical waveguide has a curve region(II). The optical power loss reducing region is positioned near the optical wave guide, and is operated in order to prevent an optical power loss inside the optical waveguide.