Patent ID: 8249404
Filing Date: 2012-08-21
Classification: G02B

Abstract:
1. A polymer optical waveguide comprising: a core; a cladding enclosing the core and extending along a direction of light propagation, the polymer optical waveguide having a substantially rectangular parallelepiped shape, and the polymer optical waveguide further having, at least at a position near one end thereof in a longitudinal direction, a groove that has a surface vertical with respect to the light propagation direction, and a surface inclined at an angle of 45° with respect to the light propagation direction which reflects light propagating through the core so as to change the light propagation direction by 90° , a part of the cladding being left at a bottom of the groove; a protruding portion positioned between an end surface at the one end of the optical waveguide and the vertical surface of the groove, the protruding portion being disposed along a length direction of the groove so as to oppose the surface inclined at an angle of 45° ; and a width of the protruding portion in the length direction of the groove being more than about 50 μm but not more than about 1,000 μm, wherein the groove is not part of the protruding portion, and the protruding portion has an end surface that is common with the surface of the groove that is vertical with respect to the light propagation direction.