Patent ID: 6701049
Filing Date: 2004-03-02
Classification: G02F,H04B,H04L

Abstract:
An optical clock recovery device, comprising:a) a first optical splitting coupler, having an optical input, an optical output, and a coupled optical output, where said optical output is configured to receive a sample pulse data input of some data rate; b) a non-linear optical waveguide, having a first and a second optical end, wherein said first optical end is optically connected to the optical input of the first optical splitting coupler; c) a bi-directional coupler, having an first and second optical input and a first and second optical output, where said second optical input is optically connected to the second optical end of the non-linear optical waveguide and said first optical output provides an optical clock recovery output; d) a balanced photo-detector, having a first and a second balanced input and an electrical discriminator output, where the coupled optical output of the first optical splitting coupler is optically connected to the first balanced input and the second optical output of the bi-directional coupler is optically connected to the second balanced input; e) a rate adjustable optical short pulse clock, having an optical clock pulse output at an adjustable clock rate, optically connected to the first optical input of the bi-directional coupler, and an electrical clock rate adjustment input responsive to direct current voltages for adjusting the clock rate; and f) means for causing the electrical clock rate adjustment input of the rate adjustable optical short pulse clock to be responsive to the electrical discriminator output of the balanced photo-detector such that the clock rate synchronizes with the data rate of the sample pulse data input.