Patent ID: 9203522
Filing Date: 2015-12-01
Classification: H03L,H04B,H04L

Abstract:
1. An optical receiver comprising: a. an optical detector having an input that is positioned to detect an optical data signal received from an optical channel, the optical detector generating a received electrical data signal at an output; b. an electrical switch having a first input that is electrically coupled to output of the optical detector and a second input that is electrically coupled to an electrical data source that generates a second electrical data signal, the electrical switch passing one of the received electrical data signal and the second electrical data signal depending upon a control signal applied to a control input; and c. a data and clock recovery circuit having an input that is electrically connected to the output of the electrical switch and a control output that is electrically connected to the control input of the electrical switch, the data and clock recovery circuit generating a recovered clock and a recovered data signal when a signal-to-noise ratio of the received electrical signal is in a range where a signal locking condition is established, and generating the control signal at the control output that instructs the electrical switch to select the received electrical data signal if the signal locking condition is established and to select the second electrical data signal if the signal locking condition is not established.