Patent ID: 9625650
Date: 2017-04-18
CPC Classifications: G02B,G02F

Claim:
1. An optical circulator integrated into a transceiver to achieve bi-directional communication in a fiber optic communication network, the optical circulator comprising: a bi-directional propagation core configured to pass a transmission signal in a transmit direction and a received signal in a receive direction, the bi-directional propagation core including: wherein the first polarization shifting assembly is located between the first PBS and the second PBS, and the second polarization shifting assembly is located between the second PBS and the third PBS; wherein the bi-directional propagation core passes the received signal from the first PBS to the third PBS through the first polarization shifting assembly, the second PBS, and the second polarization shifting assembly; wherein the bi-directional propagation core passes the transmission signal from the second PBS to the first PBS through the first polarization shifting assembly; an input port optically coupled to the second PBS of the bi-directional propagation core, the input port configured to deliver the transmission signal to the second PBS; an output port optically coupled to the third PBS of the bi-directional propagation core, the output port configured to receive the received signal from the third PBS; and a network port optically coupled to the first PBS of the bi-directional propagation core, the network port configured to receive the transmission signal from the first PBS and deliver the transmission signal to a fiber optic cable, the network port further configured to receive the received signal from the fiber optic cable and deliver the received signal to the first PBS.