Theoretical evaluation and record experimental demonstration of budget improvement with remotely pumped erbium-doped fiber amplification

WDM-PON network upscaling using in-building linear SOAs

“…However the higher cost of this architecture makes difficult to implement a FTTH model in the already established networks. Present solutions to obtain higher power budgets for long reach and/or higher density PONs often imply the use of external amplification by distributed Raman amplification or the presence of Erbium Doped Fiber (EDF) segments acting as an EDFA (EFD Amplifier) in the link path [3][4][5]. Both solutions are effective, but the network has to be specifically built with these characteristics in mind: for the Raman amplification not all the fibers are equally suitable, while the EDF sections have to be previously introduced in the structure; also both of them need adequate pumping sources that have to be placed in the infrastructure and may cause crosstalk problems if the channel distribution is not considered.…”

Upstream Transmission of WDM/OCDM-PON in a Loop-Back Configuration With Remotely Supplied Short Optical Pulses

“…To avoid pulse broadening due to fiber dispersion, the trains of short optical pulses are pre-compensated with a dispersion compensation fiber (DCF) before launching into a feeder fiber. The trains of short optical pulses are supplied to an RN and amplified by a C-band erbium-doped fiber (EDF) with a remote pumping laser diode (LD) [15,16], de-multiplexed by a cyclic arrayed waveguide grating (AWG), and then split by a 1 × N power splitter. A split short optical pulse train is passed through a drop fiber and is injected into an RSOA at an ONU.…”