Optical network unit based on a bidirectional reflective semiconductor optical amplifier for fiber-to-the-home networks

Bidirectional Radio-Over-Fiber System With Phase-Modulation Downlink and RF Oscillator-Free Uplink Using a Reflective SOA

“…Therefore, about 4.2-dB sensitivity penalty is introduced by transmission over the 25-km SSMF link. This penalty is introduced by Rayleigh backscattering in the fiber, which has been shown to significantly degrade bidirectional transmission performance [3], [14]. A further contributor to the penalty is SOA noise and the 5-dB loss introduced by the SSMF decreases the SNR by 4.0 dB.…”

“…Many efforts have contributed to the study of bidirectional systems [3]- [9]. In these systems, a reflective semiconductor optical amplifier (RSOA) operating as a modulator often plays an important role [3]- [7], and both the upstream and downstream channels use the same wavelength.…”

“…In these systems, a reflective semiconductor optical amplifier (RSOA) operating as a modulator often plays an important role [3]- [7], and both the upstream and downstream channels use the same wavelength. This is an extremely useful strategy for improving the wavelength utilization efficiency.…”

Employing feed-forward downstream cancellation in optical network units for 2.5G/1.25G RSOA-based and 10G/10G REAM-based Passive Optical Networks for efficient wavelength reuse

“…A reflective, colourless ONU, e.g. based on a Reflective Semiconductor Optical Amplifier (RSOA), without wavelength-specific components is a beneficial solution [2].…”

Optimization of Rayleigh-Limited WDM-PONs With Reflective ONU by MUX Positioning and Optimal ONU Gain

“…ECENT developments in passive optical networks (PONs) propose to employ a reflective structure at the optical network unit (ONU), with centralized seeding light at the optical light termination (OLT) [1]. The carrier signal (CW) is modulated with the user data at the ONU and back reflected in the upstream direction on the same wavelength.…”