WAVEGUIDE TYPE OPTICAL DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a waveguide type optical device which is small in size and has low loss. SOLUTION: According to the invention, an optical waveguide (2) is formed on a substrate (1) and functional optical waveguides (2c-1 and 2c-2) are provided for the optical waveguide (2) and at least one of an optical input end face (2f) and an optical output end face (2g) is provided at substrate end faces (1a and 1b) that are longitudinal direction side ends of the substrate. At least one of an input optical waveguide (2a) which links the optical input end face (2f) and the functional optical waveguides (2c-1 and 2c-2) or an output optical waveguide (2e) which links the optical output end face (2g) and the functional waveguides (2c-1 and 2c-2) makes an angle that is not zero with respect to the functional waveguides (2c-1 and 2c-2) at one side of the optical input end face (2f) and the optical output end face (2g) and it is characterized by the angle with respect to the substrate end faces (1a and 1b) at respective side is made other than 90 degrees. COPYRIGHT: (C)2006,JPO&NCIPI