Patent ID: 6950582

Claim:
A bi-directional optical transceiver module comprising: a light source for outputting a transmission optical signal; an optical detector for detecting a reception optical signal; an optical fiber being an input and output medium for the transmission and reception optical signals; a waveguide substrate on which the optical fiber, the light source, and the optical detector are mounted, and in a portion of which is formed a high reflection layer for reflecting the transmission optical signal; a first waveguide having a first layer end at the high reflection layer and extending from the light source to the first layer end, for transmitting the transmission optical signal received from the light source to the high reflection layer; a second waveguide having a first fiber end and a second layer end at the high reflection layer and extending at the first fiber end from the optical fiber to the second layer end which forms a first mode coupling region together with the first layer end, for transmitting the transmission optical signal mode-coupled from the first waveguide to the optical fiber and receiving the reception optical signal from the optical fiber; and a third waveguide having a second fiber end at the optical fiber and extending from the optical detector to the second fiber end which forms a second mode coupling region together with the first fiber end, for transmitting the reception optical signal mode-coupled from the second waveguide to the optical detector.