Open AccessSymmetric 10 Gbit/s 40-km reach DSP-based TDM-PON with a power budget over 50 dB
Author(s) -
Tatsuaki Kanai,
M. Fujiwara,
Ryo Igarashi,
Noriko Iiyama,
Ryo Koma,
Junichi Kani,
Tomoaki Yoshida
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.421917
Subject(s) - phase shift keying , burst mode (computing) , passive optical network , keying , digital signal processing , electronic engineering , power budget , physics , optics , upstream (networking) , computer science , transmission (telecommunications) , amplifier , optical amplifier , bit error rate , power (physics) , telecommunications , wavelength division multiplexing , engineering , bandwidth (computing) , laser , power control , decoding methods , wavelength , quantum mechanics
This paper introduces the concept of a symmetric 10 Gbit/s high power-budget TDM-PON based on digital coherent technology and confirms its feasibility through a bidirectional transmission experiment with a transmission distance of 40 km and power budget of more than 50 dB. Burst-mode upstream 10 Gbit/s binary-phase-shift-keying (BPSK) signals synchronized by the clock recovered from downstream 10 Gbit/s NRZ signals are detected by using an optical pre-amplifier and coherent detection based on real-time burst-mode digital signal processing (DSP) in the optical line terminal (OLT). The real-time DSP implements coefficient handover in the adaptive equalizer to allow the reception of burst-mode upstream BPSK signals with short preamble length. An experimental bit error performance evaluation of the real-time burst-mode DSP yields the receiver sensitivity of -45.1 dBm for upstream burst-mode BPSK with a preamble length of 1.3 μs. For downstream signals, the receiver sensitivity of -38.9 dBm is achieved by using a chirp-controlled transmitter with optical post-amplifier so as to avoid the signal distortion created by the chromatic dispersion of single mode fiber (SMF) when the launched power is increased.