Coherent multichannel broadcast network

Abstract

The design and performance of a 16-channel coherent broadcast network at 155.52 Mb/s are reported. It uses packaged 1.54- mu m DFB (distributed feedback) lasers stabilized at absolute frequencies and a tunable, polarization-insensitive receiver. System experiments show that a power penalty of 0.3 dB is incurred at a channel spacing of 8.5 GHz due to adjacent channel crosstalk. Results using an erbium-doped fiber amplifier gave a fiber-to-fiber gain of 22 dB and an amplifier dynamic range of 15 dB for the entire transmission spectrum. This made possible the distribution of sixteen 155-Mb/s signals to one of 256 end-users at a distance of 102 km.<>