Patent ID: 7352925

Claim:
An optical waveguide based clock distribution device: a light emitting element for emitting a light to be used as a clock signal; an optical waveguide sheet, wherein an outer circumference of a core is covered with a clad, and wherein said optical waveguide sheet is irradiated at a light incident portion of said core with said light from said light emitting element; said optical waveguide sheet is provided with one or more T-shaped branches, each T-shaped branch being provided with a mirrored surface structure for dividing, reflecting and guiding incident light into two different generally opposed directions; and one or more sloping opening portions having an inclination which slope towards or away from an outer surface of the optical waveguide which constitutes an output side of the optical waveguide sheet, said sloping opening portions serving as a mirrored surfaces for reflecting incident light in a direction out of said output surface side of said optical wave guide sheet.