Patent ID: 8582983
Filing Date: 2013-11-12
Classification: H04B,H04J,H04L

Abstract:
1. A method of generating multi-subcarrier signals using optical components, the method comprising: modulating a lightwave by a first phase modulator having a half-wave voltage and then by a second phase modulator, wherein the first and the second phase modulators are driven by a first and a second radio frequency signal, respectively, each radio frequency signal having a fixed frequency and amplitude, wherein the each amplitude is at least a few times greater than the half-wave voltage of the first phase modulator; providing a recirculation loop comprising one or more erbium-doped fiber amplifiers and an optical delay line, wherein the optical delay line is configured to generate a plurality of stable subcarriers, each stable subcarrier having a subcarrier amplitude; and using a programmable wavelength selective switch to shape each subcarrier amplitude and to suppress certain ones of the stable subcarriers.