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By suppressing one of the conjugated sidebands, the phase-modulated downstream OFDM signal can be directly detected and remodulated for upstream transmission simultaneously. Thus, colorless ONU can be realized with symmetric bitrate and low-cost direct-detection receiver.
A novel subband access scheme for multiband high-speed orthogonal frequency division multiplexing (OFDM) passive optical network (PON) is proposed, where the granularity of the bandwidth allocation is as small as the bandwidth of just one subcarrier and the ONUs only receives the desired subcarriers according to the bandwidth allocation strategy from the whole downstream OFDM signal without band limitation...
Utilizing the steep spectrum edge of OFDM signal and narrow bandwidth optical filter, a carrier reuse scheme for colorless OFDM-PON is experimentally demon-strated with 10Gb/s bitrate for both 16QAM-OFDM downstream and OOK upstream signal.
We propose a wavelength reusable WDM-PON scheme using protective interconnection fibers to achieve whole optical distribution network protection. 10Gb/s bidirectional transmission is experimentally demonstrated and protection performance is analyzed.
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