Patent ID: 11899256
Assignee: NEC CORPORATION
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An optical communication system comprising:
an optical transceiver comprising:
a carrier comprising;
a light source configured to output a light;
an isolator configured to transmit the light from the light source;
a splitter configured to split the light from the isolator into an output light and a local oscillation light; and
a modulator configured to modulate the output light based on a first data signal; and
an optical coherent receiver external to the carrier and configured to demodulate an optical signal, by using the local oscillation light, to a second data signal;

a first optical fiber configured to propagate the modulated output light;
a second optical fiber configured to propagate the optical signal to the optical coherent receiver; and
an optical communication apparatus configured in such a manner that the optical transceiver is insertable into, and removable from, the optical communication apparatus, wherein the optical transceiver is configured to output the modulated output light to the first optical fiber, to receive the optical signal from the second optical fiber, and to transfer the received optical signal to the optical coherent receiver, and
wherein the first optical fiber and the second optical fiber are insertable into, and
removable from, the optical transceiver.