Bidirectional optical transmission method and apparatus...

H - Electricity – 04 – B

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H04B 10/12 (2006.01) H04B 10/24 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2054245

ABSTRACT OF THE DISCLOSURE A method and an apparatus for bidirectional optical transmission capable of communicating in the bidirection through a single optical transmission path are disclosed. A light traveling in one direction is modulated by a first base band signal and another light traveling in another direction is modulated by a subcarrier signal which is modulated by a second base band signal for subsequent conversion into the binary digit pulse. A light receiving circuit for receiving the light traveling in said another direction is comprised of a synchronizing detection demodulator and at least a light receiver to which an electrical signal synchronizing to the subcarrier signal is applied.

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