Patent ID: 7778502

Claim:
An optical transmission assembly, comprising: a single optical waveguide plate comprising an upper cladding, a lower cladding, and a core formed between the upper cladding and the lower cladding, an inverted V-shape groove being formed in a lower surface of the lower cladding and the core; a surface light emitting device mounted to an upper surface at one end of the upper cladding, a light emitting surface of the surface light emitting device facing the core and emitting wavelength λ 1 light thereto; a driver mounted on the upper surface at the one end of the upper cladding, the driver driving the surface light emitting device; a reflective surface formed in the core and at a position facing the light emitting surface of the surface light emitting device, and inclined in a longitudinal direction of the core, wherein an inclined surface of the inverted V-shape groove faces the reflective surface in a longitudinal direction of the core, and is inclined in a height direction of the upper or lower cladding; a wavelength filter formed on the inclined surface, said wavelength filter being confined within the inverted V-shape groove and transmitting wavelength λ 1 light incident in a longitudinal direction of the core while reflecting wavelength λ 2 (λ 2 ≠λ 1 ) light incident in an opposite longitudinal direction of the core to an incident direction of the wavelength λ 1 light, in a height direction of the lower cladding; a light receiving device mounted on a lower surface of the lower cladding and facing the wavelength filter, and a preamplifier mounted on the lower surface of the lower cladding, the preamplifier amplifying a received light current of the light receiving device.