Patent ID: 7650084
Filing Date: 2010-01-19
Classification: H04B

Abstract:
1. An optical heterodyne receiver, comprising: an optical demodulator having first and second optical inputs and first and second electrical outputs and configured to generate at said first and second electrical outputs an in-phase signal and a quadrature-phase signal, respectively, in response to receiving a modulated optical signal at said first optical input and a reference optical oscillator signal at said second optical input; an electrical demodulator coupled to said optical demodulator and configured to extract a single upper sideband and a single lower sideband of said in-phase signal or said quadrature-phase signal and configured to produce a control signal fed back to said optical demodulator; and at least one first analog-to-digital converter coupled to said electrical demodulator and configured to receive and sample said extracted single upper sideband and at least one second analog-to-digital converter coupled to said electrical demodulator and configured to receive and sample said extracted single lower sideband.