Dual output SOA based amplifier for PON extenders

Saturated collision amplifier for the extended reach Passive Optical Networks: The upstream challenge

“…The signals are amplified while they simultaneously traverse the SOA gain medium from the opposite directions, and finally the signals are coupled out via the circulators. As discussed in [5], this arrangement permits saturated SOA operation, which results in the maximized output power, low ASE noise, virtual absence of pattern effects, and minimized polarization dependence. In other words, the common negatives of an SOA are effectively mitigated.…”

“…Even more, the SCA will equalize burstto-burst power variations. Based on our measurements in [5] we expect up to 40 dB equalization range.…”

“…One promising technology for the PON reach extension is a Semiconductor Optical Amplifier (SOA) based Saturated Collision Amplifier (SCA) [5]. We recently demonstrated an SCA XGPON1 single-wavelength downstream RE with the feeder budget of 35 dB and the access budget of 40 dB in collaboration with Orange-France Telecom Labs [6].…”

TDM/DWDM PON Extender for 10 Gbit/s Downstream Transmission

“…As discussed in [4], this arrangement permits saturated SOA operation, which in turn results in maximized output power, low ASE noise, virtual absence of pattern effects, and minimized polarization dependence. Also, the ONUs need no DLI, because the modulation format conversion is performed in the remote node.…”

“…Recently, a new optical amplifier configuration, the saturated collision amplifier (SCA), was developed and its advantages compared to single SOA amplification was demonstrated [4]. In this paper, a network configuration for downstream time-and dense-wavelength-division multiplexed (TDM/DWDM) PON using SCA is proposed.…”