Patent ID: 8886048

Claim:
An optical transceiver device, comprising: a transmitter comprising a light source for emitting light, an electrical signal source configured for providing an electrical signal, and a modulator configured for modulating the light in response to the electrical signal, thereby producing a modulated light signal; a first optical circulator and a second optical circulator, each of the first and second optical circulators comprising a first port, a second port and a third port, the first port of the first optical circulator optically connected to the transmitter and configured for receiving the modulated light signal, the second port of the first optical circulator optically connected to the first port of the second optical circulator, thus allow the modulated light signal to exit from the first optical circulator through the second port thereof and enter the second optical circulator through the first port thereof, the second port of the second optical circulator configured for outputting the modulated light signal, and the third port of the second optical circulator configured for receiving an incoming light signal, the first and second optical circulators allowing the incoming light signal to exit from the second optical circulator through the first port thereof and enter the first optical circulator through the second port thereof; and a receiver comprising a photoelectric converter optically connected to the third port of the first optical circulator and configured for receiving the incoming light signal exiting therefrom and converting the incoming light signal into an electrical signal, the photoelectric converter further connected to the modulator and configured for providing an electrical signal matching the electrical signal from the electrical signal source to the modulator.