Loop-Back WDM-PON With 100 Gb/s Capacity Using Spectrally Sliced ASE Injected RSOA

Abstract

We experimentally investigated the 1.25 Gb∕s operation of a spectrally sliced amplified spontaneous emission (ASE) injected reflective semiconductor optical amplifier (RSOA) with 50 GHz channel spacing using an injection current adjustment, dispersion management, and the use of an optical receiver with an optimized decision threshold level. We mitigated the relative intensity noise (RIN) degradation caused by post-filtering through the injection current adjustment, and also alleviated the dispersion-induced RIN degradation with the help of the dispersion management method. Finally, the use of an optical receiver with an optimized decision threshold level eliminated error floors, which were attributed to an unequal noise distribution between the mark level and the space level. We also successfully demonstrated a loop-back wavelength division multiplexing-passive optical network (WDM-PON) with a 100 Gb∕s (80 × 1.25 Gb∕s) capacity using a spectrally sliced ASE injected RSOA by means of the three aforementioned methods. We also analyzed and examined the transmission impairments, such as the dispersion penalty and back-reflection induced penalty, in a 1.25 Gb∕s bidirectional WDM-PON based on an RSOA with 50 GHz channel spacing.

25-GHz Spaced Spectrum-Sliced WDM PON Using 50-GHz AWGs

“…4, there is no error floor for the 50-GHz spectrum sliced channel without adjacent channels in back-to-back condition. It agrees with [8]. With the addition of adjacent channels for the 50-GHz spectrum sliced channel, we have error floors due to the cross talks from adjacent channels.…”

“…It also enables wavelength reuse of the downstream channel within the Manuscript optical network unit (ONU) of each subscriber [11], [12]. Spectrum-sliced WDM PONs having 100-GHz [7] and 50-GHz [8] channel spacing values have been demonstrated with 1-GbE speed for both downstream and upstream directions. Typically, a single arrayed-waveguide grating (AWG) is used for the spectrum slicing and the spectrum-sliced WDM PON has the same channel spacing as that of the AWG.…”

Intra-Cavity Chromatic Dispersion Impacts on 10-Gb/s Optical OFDM Transmissions Over 25-km Dual-RSOA-Based Self-Seeded PON Systems

“…5 that, in comparison with the dispersive cavities, for the 25 km SMF IMDD transmission, the CD-compensated cavities decrease the transmission-induced signal RIN growth by 1.1 dB, regardless of the cavity lengths. Similar to those reported for multi-longitudinal mode lasers [15] and spectrally sliced ASE light sources with RIN suppression [16], [17], it is shown in Fig. 5 that the RIN difference grows rapidly with increasing transmission distance.…”

Wavelength Sharing and Reuse in Dual-Band WDM-PON Systems Employing WRC-FPLDs

“…To reduce the burden of network operation and maintenance as well as enhance the network flexibility, upstream transmitters should be colorless, cost-effective, and easy to handle. Various transmitter configurations have been proposed, and among them, reflective semiconductor optical amplifiers (RSOAs) [2]- [5], reflective electro-absorption modulators (REAMs) [6], and Fabry-Perot laser diodes (FPLDs) [7]- [9] have been intensively studied to achieve a cost-effective colorless wavelength reuse. However, several drawbacks exist in traditional schemes where downstream modulated lights are simultaneously reused to injection-lock the upstream transmitters.…”