Capacity Enhancement of WDM-TDM Next Generation Bidirectional Passive Optical Networks Using DPSK Technique

Abstract

Abstract-Passive Optical Network is designed such that it meets the requirements of NG-PON. According to FSAN, the Time and Wave Length Division Multiplexing (TWDM) is chosen as the best solution to implement NG-PON. EDFA amplifier is used in the system to compensate the effects of degraded signal in both the directions upstream/ Downstream (US/DS). It is observed that system can transmit over 40 Km SMF with acceptable BER. NGPONs also remarkably improves increase in the users to 2400 downstream and 512 upstream. It is observed that with increase of link length the value of Q-factor decreases and there is increase in the BER. Capacity enhancement, high data rate and large bandwidth can be achieved by using advanced modulation formats between efficient techniques.