Coherent Wavelength Locking

Abstract

An optical communication device includes a laser, a transmitter (Tx), a receiver (Rx) and a device controller. The laser is configured to generate an optical carrier. The transmitter is configured to generate an optical Tx signal using the optical carrier and to transmit the optical Tx signal to a peer optical communication device. The receiver is configured to receive an optical Rx signal from the peer optical communication device, and to down-convert the optical Rx signal using the optical carrier. The device controller is configured to adjust a frequency of the laser to reduce a Carrier Frequency Offset (CFO) between the received optical Rx signal and the optical carrier generated by the laser, including conditionally applying to a frequency of the laser a series of frequency hops in accordance with a defined dithering sequence.

Dependencies are inferred from the claim text.