Patent ID: 9716552
Date: 2017-07-25
CPC Classifications: G02B,H04B,H04J,H04Q

Claim:
1. An optical time-division multiplexed (OTDM) coherent transceiver comprising: an input waveguide; an optical transmitter; an optical receiver; and a first optical splitter connected to the input waveguide and configured to divide a signal from the input waveguide to N differential delay waveguides that are connected between the first optical splitter and N second optical splitters, wherein the N differential delay waveguides provide differential delays corresponding to integer multiples of a symbol period of the signal divided by N, and wherein the N second optical splitters are coupled to inputs of both the optical transmitter and the optical receiver, a first N outputs from the N second optical splitters being optically connected to the optical receiver and a second N outputs from the N second optical splitters being optically connected to the optical transmitter, the N second optical splitters being between the first optical splitter and the optical transmitter, wherein the differential delays for the first N outputs optically connected to the optical receiver and the differential delays for the second N outputs optically connected to the optical transmitter are the same.