Abstract
We proposed an Upstream Multi-Wavelength Shared (UMWS) PON architecture based on a tunable self-seeding Fabry-Perot laser diode (FP-LD) at ONU. The performances of the wavelength and power stability, side-mode suppression ratio (SMSR), tuning range for the proposed tunable self-seeding laser module at ONU are experimentally investigated. The BER is measured with direct modulation on FP-LD of 1.25 Gbps upstream data. The extensive simulations not only evaluate the enhanced performance from the upstream wavelength-sharing, but also for the first time investigate the impact of channel Switch Latency (SL) on the network performance.
Highlights
Time division multiplexed passive optical network (TDM-PON) such as Ethernet PON (EPON) and Gigabit PON (GPON) is a promising solution in the last mile access systems and being deployed around the world [1,2]
The output power of the laser is determined by the gain profile of the Fabry-Perot Laser Diode (FP-LD), it is lower at both ends of the spectrum
We study the effect of channel switch latency (SL) on the network performance based on the multiwavelength Interleaved Polling with Adaptive Cycle Time (IPACT)
Summary
Time division multiplexed passive optical network (TDM-PON) such as Ethernet PON (EPON) and Gigabit PON (GPON) is a promising solution in the last mile access systems and being deployed around the world [1,2]. 10 Gbps TDM-PONs are investigated in order to satisfy higher capacity requirements [2]. The 10 Gbps downstream broadcasting can be deployed using distributed feedback laser diode (DFB-LD) with external modulation. We proposed a novel Upstream Multi-Wavelength Shared (UMWS) PON architecture, based on a wavelength-tunable self-seeding Fabry-Perot Laser Diode (FP-LD) without fiber amplifiers inside the gain cavity at ONUs. The PON upgrades upstream capacity by introducing multiple wavelengths (to avoid higher burst mode data speed at ONUs), and improves significantly bandwidth utilization with inter-channel statistical multiplexing. The proposed self-seeding laser module at ONU does not require external light injection sending from the optical line terminal (OLT) and dynamically locks onto only one of many longitudinal modes of the FP-LD. The paper for the first time investigates the effect of channel switch latency (SL) on the dynamic bandwidth allocation (DBA) with the prevailing multi-wavelength Interleaved Polling with Adaptive Cycle Time (IPACT) scheme [3]
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