Frequency Shifter for Photonic Multiple Microwave Frequency Measurement

A new structure for the realisation of multiple frequency measurement by creating a frequency shifter using Photonic principles. The method is based on the shifting of modulated lower sideband of an optical signal until it matches with the original carrier signal frequency and passing through a travelling wave SOA after adding it with the unshifted reference carrier signal followed by a narrowband filter to detect four-wave mixing power above 20 dBm.