Gigabit optical access using WDM PON based on spectrum slicing and reflective SOA

Directly-Modulated Self-Seeding Reflective SOAs as Colorless Transmitters for WDM Passive Optical Networks

“…1. For field deployments, polarization-independent RSOAs that are commercially available will be preferred [5]. For the purposes of this proof-of-concept demonstration, an optical amplifier is added in the RN to compensate for the high roundtrip insertion loss (; 24 dB) experienced by the seeding light of the RSOA.…”

Modern PON architectures

“…• Reflective Semiconductor Optical Amplifiers (RSOA) [5][6][7] : A typical architecture in this case is shown in Figure 5. A light source sends some seed wavelength to the ONU where it is spectrally separated from the downstream data signal and modulated by an reflective SOA, i.e.…”

Bidirectional 2.5-Gb/s WDM-PON Using FP-LDs Wavelength-Locked by a Multiple-Wavelength Seeding Source Based on a Mode-Locked Laser

“…Recently, substantial research efforts have been investigated to provide low-cost and wavelength-independent (so-called colorless) transmitters for WDM-PON. Some well-known solutions are generally based on the use of a Fabry-Pérot laser diode (FP-LD) [1] or a reflective semiconductor optical amplifier (RSOA) [2] externally injected by a spectrum-sliced broadband light source (BLS). However, since spectral slicing of a BLS inherently suffers from strong intensity noise [1], [3] as well as incoherent characteristic, the transmission is difficult to be achieved at 2. several demonstrations at 2.5 Gb/s based on spectral slicing of BLS [4] or a conventional Fabry-Pérot laser [5], but their reported performances are limited; a bidirectional transmission capability over a typical length of access network (20 km or more) has not been achieved.…”