Patent ID: 6868210
Filing Date: 2005-03-15
Classification: G02B

Abstract:
1. An optical waveguide including, on a substrate, a clad formed of a transparent material, and a core formed of a transparent material having a refractive index higher than a refractive index of the clad, said optical waveguide comprising at least: a first optical waveguide; a filter, a mirror structure, or a substrate end structure for reflecting light from said first optical waveguide; and a second optical waveguide provided to receive reflected light from said first optical waveguide, a typical value or an average value of a diameter, a width, or a thickness of the core of said second optical waveguide being adjusted to be substantially not less than twice and not more than twenty times as large as a typical value or an average value of a diameter, a width, or a thickness of the core of said first optical waveguide.