OPTICAL TRANSMITTING AND RECEIVING APPARATUS PROVIDED WITH INCORPORATED OPTICAL CIRCULATOR

摘要

PURPOSE: To easily resolve the problem with as few elements as possible that detection signals change as a result of time dependent polarization of an optical fiber output and loss is received in many cases by a simple method. CONSTITUTION: In this transmitter-receiver to be connected to an optical bidirectional transmission path, provided with a transmitter 2 and at least one receiver 01 connected to a device connector through a fork circuit provided with a first polarized beam splitter PBS1, a non-correlated polarization beam rotor R and a second polarized beam splitter PBS2, for which the first output of the first polarized beam splitter PBS1 and the entrance of the second polarized beam splitter PBS 2 respectively form the input connection and bidirectional connection of the fork circuit and the input and output of the non-correlated polarized beam rotor R are respectively connected to the input of the first polarized beam splitter PBS1 and the second output of the second polarized beam splitter PBS2, the receiver 02 is connected to the second output of the polarized beam splitter.