Saturated collision amplifier reach extender for XGPON1 and TDM/DWDM PON

Abstract

Saturated Collision Amplifier (SCA) is a novel amplification scheme that uses SOA saturation in order to maximize the output power and minimize the ASE noise and the polarization sensitivity. We demonstrate the SCA reach extension in a commercial single-wavelength XGPON1 prototype system where bidirectional optical budget of up to 50 dB is obtained. The traffic performances are compared between the SCA and the conventional SOA extender. The novel extension scheme is demonstrated also for two- and four-wavelength 10 Gbit/s unidirectional downstream configurations with 45 km and 100 km transmission distances with 58-dB maximum total optical budget for each wavelength.

Power budget extension for higher-order modulation formats in PONs

“…1 In this section we use two methods to extend the power budget of a WDM system for DPSK modulated signal and compare the results, first method is using a SOA for amplification and a delay line interferometer (DLI) to convert the signal from Differential Phase Shift Keying (DPSK) to On-Off-Keying (OOK) and the second one is using SCA. 4 As it is depicted in Fig. 1 and Fig.…”

Symmetric 40-Gb/s, 100-km Passive Reach TWDM-PON with 53-dB Loss Budget

“…Even though electrical or optical repeaters in the remote node can improve the transmission distance and loss budget [8]- [10], truly passive reach is preferred in order to keep the "passive" characteristic of PON system. External modulation combined with coherent detection has been considered as a good solution for long reach and high loss budget [9], [10]. Using complex modulation format and coherent digital receiver in optical line terminal (OLT) and/or optical network unit (ONU), symmetric 10G-PON with loss budget up to 53 dB [11] and 51 dB [12] (considering the FEC limit BER of 3.8 × 10 −3 ) have been achieved.…”