Patent ID: 6351584
Filing Date: 2002-02-26
Classification: G02B

Abstract:
An optical transmitter-receiver connected to an optical fiber used for a single-core two-way optical communication channel for making a first optical signal to be sent incident upon an end of the optical fiber and receiving a second optical signal sent via the optical fiber, comprising:emission means for emitting said first optical signal; light receiving means for receiving said second optical signal outgoing from the end of said optical fiber; and an optical system for making the first optical signal from said emission means incident upon the incident end of said optical fiber in an optical path in a direction different from a direction of an optical path in which said second optical signal is outgoing from the end of the optical fiber, wherein: if said first optical signal is made incident upon the end of the optical fiber, said light receiving means is arranged outside an area which reflected light generated because said first optical signal is reflected by the end of said optical fiber reaches, the optical path of the first optical signal and the optical path of the second optical signal are independent.