Colorless ONU implementation for WDM-PON using direct-detection optical OFDM |
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| Authors: | Min Feng Qing-long Luo Cheng-lin Bai |
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| Affiliation: | 12407. College of Physics Science and Information Engineering, Liaocheng University, Liaocheng, 252059, China
22407. Key Laboratory of Optical Communications Science & Technology of Shandong Province, Liaocheng University, Liao-cheng, 252059, China
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| 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 γ-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. |
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