Wavelength-division-multiplexed passive optical network based on spectrum-slicing techniques

TLDR

We propose a new WDM passive optical network architecture that uses N×N waveguide grating routers in the remote node and central office to simultaneously multiplex and demultiplex N‑1 channels in each direction. The network employs a spectrum‑sliced fiber amplifier light source for 15 downstream 500‑Mb/s channels, 1.5‑µm LEDs for 155‑Mb/s upstream channels, an erbium‑doped fiber amplifier at the central office to compensate slicing losses, and two types of bandpass filters to suppress crosstalk. Crosstalk was suppressed to a negligible level, resulting in no significant degradation of receiver sensitivity.

Abstract

We propose and demonstrate a new wavelength division-multiplexed (WDM) passive optical network (PON) architecture that uses N×N waveguide grating routers (WGRs) in the remote node and central office for simultaneous multiplexing and demultiplexing of N-1 channels in each direction. In the demonstrated network, a spectrum-sliced fiber amplifier light source was used to transmit 15 downstream channels operating at 500 Mb/s. The 155-Mb/s upstream channels used 1.5-μm LED's. In addition, an erbium-doped fiber amplifier was used at the, central office to compensate the slicing losses of low-power LED's. The crosstalk, caused by using WGR's for both multiplexing and demultiplexing channels, was suppressed to a negligible level by using two types of bandpass filters. There was no significant degradation in the receiver sensitivity caused by this crosstalk.