Abstract
The next-generation passive optical network stage 2 (NG-PON2) effort was
initiated by the full service access network (FSAN) in 2011 to investigate on upcoming
technologies enabling a bandwidth increase beyond 10 Gb/s in the optical access network.
The FSAN meeting in April 2012 selected the time- and wavelength-division multiplexed
passive optical network (TWDM-PON) as a primary solution to NG-PON2. In this paper, we
summarize the TWDM-PON research in FSAN by reviewing the basics of TWDM-PON and
presenting the world's first full-system 40 Gb/s TWDM-PON prototype. After introducing
the TWDM-PON architecture, we explore TWDM-PON wavelength plan options to meet the
NG-PON2 requirements. TWDM-PON key technologies and their respective level of
development are further discussed to investigate its feasibility and availability. The
first full-system 40 Gb/s TWDM-PON prototype is demonstrated to provide 40 Gb/s
downstream and 10 Gb/s upstream bandwidth. This full prototype system offers 38 dB power
budget and supports 20 km distance with a 1:512 split ratio. It coexists with
commercially deployed Gigabit PON (G-PON) and 10 Gigabit PON (XG-PON) systems. The
operator-vendor joint test results testify that TWDM-PON is achievable by the reuse and
integration of commercial devices and components.
© 2012 IEEE
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