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We successfully demonstrated real-time 16 quadrature amplitude modulation (QAM) encoded 11.52 Gb/s optical orthogonal frequency division multiplexing (OFDM) transceiver and experimentally investigated its optical transmission performances for OFDMA-PON systems. Considering practical deployment of OFDMA-PON, we decided to design and implement the 128 fast Fourier transform (FFT) in our OFDM baseband...
We proposed a burst mode bit discrimination circuit for dual rate reach extender and experimentally demonstrated the transmission performances of dual rate burst mode receiver in a WDM-TDM-Hybrid-PON based on 10G-EPON.
We have successfully demonstrated a loop-back WDM-PON with a 100 Gb/s (80 × 1.25 Gb/s) capacity using spectrally sliced ASE injected RSOA. To mitigate the RIN degradations, we proposed injection current adjustment, dispersion management and the use of receiver with optimized decision threshold level.
GPON Extender is required to extend transmission reach in GPON. In this paper, we propose simple activation techniques and a burst reset controller for the extender, and discuss experimental results of the Extender with CWDM links.
We successfully demonstrated the 1.25 Gb/s operation of ASE injected RSOA with 50 GHz channel spacing by using the injection current adjustment, the dispersion management and the receiver with decision threshold level control. We could mitigate the RIN degradation caused by post filtering through the injection current adjustments, and also alleviate the dispersion induced RIN degradation by means...
We demonstrate a linear bus wavelength-reuse WDM-PON with simple add/drop nodes. By using RSOA transmitters at the OLT and the ONT, 16 downstream and upstream signals with 1.25 Gb/s were successfully transmitted over four OADMs spaced at 5-km intervals.
The effect of the crosstalk of wavelength-division-multiplexing (WDM) optical filters on the performance of WDM transmission systems that use multilevel modulation formats are examined and it is found that the currently common specification of -30 dBm is not adequate when more than eight signal levels are used. Also, the systems using coherent detectors and those using direct detection receivers are...
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