Reflective SOAs optimized for 1.25Gbit/s WDM-PONs

Self-Coherent Reflective Passive Optical Networks

“…The first results have been proposed in [18], where the uplink data stream was reflected and modulated via the RSOA at 1.25 Gbit/s, as then further developed and investigated in several later works (e.g. [19][20][21][22]). …”

Loss budget expansion technique using gain-saturated SOA in WDM single-fiber loopback access networks

“…However, these techniques induce serious original SNR degradation for high speed data signals due to the low coherency of such light sources. An intensity noise suppression technique that uses a gain-saturated semiconductor optical amplifier (SOA) in each ONU has been proposed [9]. In Ref.…”

“…In Ref. [9], this technique is applied to suppress the excess intensity noise of the sliced ASE light distributed from the CO, however, its use in reducing the impact of the backreflection has yet to be investigated.…”

“…Unlike [9], the gain compression effect of the gainsaturated SOA reduces the intensity noise caused by the interference between the CW light and Reflection-II, which expands the loss budget of the transmission line. We describe the configuration of upstream transmission in these access networks, and also explain the backreflection issues.…”

Reducing the backreflection impact by using gain-saturated SOA in WDM single-fiber loopback access networks

“…This SNR degradation reduces the loss budget of the transmission line. An intensity noise suppression technique that uses a gain-saturated semiconductor optical amplifier (SOA) in each ONU has been proposed [5]. In Ref [5], this technique is applied to suppress the excess intensity noise of the sliced amplified spontaneous emission (ASE) light distributed from the CO, however, its use in reducing the impact of the backreflection has yet to be investigated.…”