Frequency Stabilization of FDM Optical Signals Originating From Different Locations.

Frequency stabilization of FDM optical signals to a comb of equally-spaced frequencies has been demonstrated for optical signals originating from different locations. The result was achieved by locking each optical source to a resonance of a separate fiber Fabry-Perot cavity. The Fabry-Perots combs of resonances were synchronized by locking all these devices to a master reference. Implementation of the frequency stabilization circuit requires, at each location, a tunable fiber Fabry-Perot resonator, a photodetector and simple electronics. Such a simple circuit provides the means to frequency stablize a large number of FDM optical sources originating for different locations, as in a star network.