Demonstration of a full duplex PON featuring 2.5 Gbps sub carrier multiplexing downstream and 1.25 Gbps upstream with colourless ONU and simple optics

Abstract

We demonstrate a full-duplex DPSK SCM PON operating at 2.5Gbps/1.25Gbps bitrates, with RSOA ONU and simplified scheme. It achieves low sensitivity and is implemented with low-cost components.

A Fully Bidirectional Optical Network With Latency Monitoring Capability for the Distribution of Timing-Trigger and Control Signals in High-Energy Physics Experiments

“…The transmission medium is shared among the ONUs in the upstream direction and a channel arbitration mechanism is adopted to avoid collisions from multiple ONU transmissions. The arbitration method of choice in the first generation commercial deployments has been time division multiple access (TDMA), [16], [17], but prototypical, symmetric bandwidth PONs based on wavelength division multiplexing (WDM) [18], sub-carrier multiplexing (SCM) [19], optical code division multiplexing (OCDMA) [20] and others have been extensively reported in the literature. PONs are also known as Fiber-To-The-Home/ Premises (FTTH/P) networks and are now formally part of the of the Ethernet protocol, (EPON), by IEEE [21].…”

Bandwidth efficient bidirectional 5 Gb/s overlapped-SCM WDM PON with electronic equalization and forward-error correction

“…Several architectural, optical, electrical and signal processing techniques have been proposed to mitigate the impact of RB [16][17][18][19][20]. Interest has also been shown toward using radio frequency (RF) subcarrier multiplexing (SCM) as a simple and low cost means to reduce these effects [21][22][23][24].…”

“…Many previous SCM implementations have generally been limited to asymmetric and/or subgigabit data rates by the RSOA's bandwidth and the use of guard bands to separate the uplink and downlink RF spectra and facilitate electrical filtering [22,23,25]. Recently, the authors demonstrated a novel overlapped-SCM (O-SCM) architecture that permits up to 2.5 Gb/s symmetric data rates by reducing the guard band and introducing an overlap between the received uplink and residual downlink spectra [26,27].…”

Bidirectional WDM PON Enabled by Reflective ONUs and a Novel Overlapped-Subcarrier Multiplexing Technique

“…However, in a single feeder PON, when the RSOA seed light has the same wavelength as that used for the downlink transmission, the system performance is severely degraded by Rayleigh backscattering [5]. Recently, subcarrier multiplexing (SCM) has been proposed to mitigate such degradation [5][6][7][8]. SCM may be used either for the uplink or the downlink, or for both transmissions as in [6].…”