Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (3): 114-120.doi: 10.1016/S1005-8885(13)60059-X

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Simple and spectrally-efficient design of high capacity hybrid WDM/TDM-PON with improved receiver sensitivity

  

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2012-09-20 Revised:2013-03-15 Online:2013-06-30 Published:2013-06-26
  • Contact: Ahmed MuddassirKHAN E-mail:mail2muddassir@gmail.com
  • Supported by:

    This work was supported by the National Basic Research Program of China (2010CB328204), the National Natural Science Foundation of China (60932004), the Hi-Tech Research and Development Program of China (2012AA011301), the RFDP Project (20090005110013), the 111 Project (B07005) of China, and the Fundamental Research Funds for the Central Universities (2011RC0406).

Abstract:

A simple design of hybrid wavelength division multiplexed/ time division multiplexed passive optical network (WDM/ TDM-PON) is demonstrated for the high capacity next generation access (NGA) network, having advantages of both WDM and TDM based PON techniques. A 10 Gbit/s differential quadrature phase shift keying (DQPSK) data signal is used at optical line terminal (OLT) for downstream, whereas a 2.5 Gbit/s inverse return-to-zero (IRZ) data signal with high extinction ratio is used for upstream signal by intensity re-modulation of downstream signal, no additional laser is used at optical network unit (ONU). Simulation results verify that aggregated 100 Gbit/s downstream transmissions of 10 DQPSK channels and aggregated 25 Gbit/s upstream transmission of 10 IRZ channels, using spectrally-efficient 50 GHz channel spacing, can be successfully achieved over a distance of 20 km with less than 1 dB transmission power penalties and improved receiver sensitivity.

Key words:

centralized light source, hybrid WDM/TDM-PON, DQPSK, IRZ, receiver sensitivity