Abstract

The experiment (Fig. 1) simulated a broadcast network, consisting of a single remote head-end distributing 12 wavelength-division multiplex (WDM) channels to 39 530 064 customers, by using passive optical splitters. Each wavelength was capable of carrying 32 digital PAL video channels multiplexed at 2.2 Gb/s. Only two stages of erbium-doped fiber amplifiers were used, both providing high saturated output powers.¹ The first, at the remote head-end, was pumped by a color-center laser at 1480 nm, producing +20.5-dBm output power, and the second, at the exchange (CO) location, was pumped by a Ti:sapphire laser to produce +24.5 dBm. The final 28-way split was a simulated passive optical local loop. Customer channel selection was by tuneable grating filter² with a 0. 6-nm passband and a single-chip sampling gate.³

© 1991 Optical Society of America