200 Gb/s/λ Bidirectional Coherent PON Solutions Demonstrated Over Field Installed Fiber

We demonstrate 200 Gb/s bidirectional coherent PON solutions using a simplified optical network unit (ONU) over 19 km of field-installed fiber. The ONU receiver is a single-polarization heterodyne detector with either a balanced or a single-ended photodetector and the transmitter is based on dual-polarization electro-absorption modulated laser (EML). The optical line terminal (OLT) uses standard dual-polarization coherent transceivers. The downstream solutions achieve 37 dB and 30.5 dB power budget for the receiver with balanced and single-ended photodiodes, respectively. For the upstream, two line rates have been investigated: 200 Gb/s/
$\lambda $
for symmetrical transmission and 100 Gb/s/
$\lambda $
for asymmetric transmission achieving a power budget of 30.1 dB and 40.9 dB respectively.