光电子快报(英文版), 2013, 9 (2): 135, Published Online: Oct. 12, 2017
Colorless ONU implementation for WDM-PON using direct-detection optical OFDM
Abstract
A novel architecture for the colorless optical network unit (ONU) is proposed and experimentally demonstrated with direct-detection optical orthogonal frequency division multiplexing (DDO-OFDM). In this architecture, polarization- division multiplexing is used to reduce the cost at ONU. In optical line terminal (OLT), quadrature amplitude modulation (QAM) intensity-modulated OFDM signal with x-polarization at 10 Gbit/s is transmitted as downstream. At each ONU, the optical OFDM signal is demodulated with direct detection, and y-polarization signal is modulated for upstream on-off keying (OOK) data at 5 Gbit/s. Simulation results show that the power penalty is negligible for both optical OFDM downstream and the on-off keying upstream signals after over 50 km single-mode fiber (SMF) transmission.
FENG Min, LUO Qing-long, BAI Cheng-lin. Colorless ONU implementation for WDM-PON using direct-detection optical OFDM[J]. 光电子快报(英文版), 2013, 9(2): 135.