研究目的
Investigating the performance of a bi-directional WDM-TDM PON with upstream re-modulation based on RSOA for 64 ONUs at 60 Km reach with 5 Gb/s downstream and 2.5 Gb/s upstream bit rate.
研究成果
The study demonstrates a cost-effective bi-directional WDM-TDM PON with 5 Gb/s downstream and 2.5 Gb/s upstream re-modulated data based on RSOA. It was observed that as the extinction ratio increases, downstream link performance improves while upstream link performance deteriorates. The downstream receiver optical power variation affects downstream signal performance but not the upstream signal. Increasing RSOA input power and device saturation improves downstream signal BER.
研究不足
The study is limited to simulation results and does not include physical implementation. The performance is evaluated based on BER and Q-factor under specific conditions.
1：Experimental Design and Method Selection:
The study involves simulating a bi-directional WDM-TDM PON with upstream re-modulation based on RSOA. The simulation model includes a transmitter section with PBRS block, electric signal generator, laser, and modulator, a multiplexer (MUX), a bi-directional fiber, a de-multiplexer (DEMUX), optical filters, and a 1:16 splitter.
2：Sample Selection and Data Sources:
The simulation uses two wavelengths, 1550 nm and 1549 nm, with 100 GHz spacing.
3：List of Experimental Equipment and Materials:
The model includes a laser, modulator, MUX, DEMUX, optical filters, and RSOA.
4：Experimental Procedures and Operational Workflow:
The downstream signals are multiplexed and sent over 60 km bi-directional fiber, de-multiplexed, and then a portion is fed to the receiver while the other portion is re-modulated with upstream data by the RSOA and sent back to the CO.
5：Data Analysis Methods:
The impact on BER and Q-factor with different downstream receiver power, upstream transmitter power, and extinction ratio is studied.
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