研究目的
To evaluate the impact of signal regeneration on power efficiency of a long-haul dense wavelength division multiplexing (DWDM) system by means of different channel spacing values, focusing on single-line rate solutions with 10 Gbps, 40 Gbps, and 100 Gbps transmission signals using NRZ-OOK, NRZ-DPSK, and DP-QPSK modulation formats.
研究成果
The research provides power efficiency values and comparisons for DWDM systems using 10 Gbps NRZ-OOK, 40 Gbps NRZ-DPSK, and 100 Gbps DP-QPSK signals, highlighting the significant impact of signal regeneration on total power consumption. Results show trade-offs between spectral efficiency and power efficiency, with DP-QPSK offering higher spectral efficiency but varying power efficiency compared to other formats. The findings offer guidance for designing power-efficient long-haul DWDM systems, emphasizing the need to consider channel spacing and regeneration requirements.
研究不足
The study is limited to specific modulation formats (NRZ-OOK, NRZ-DPSK, DP-QPSK) and bit rates (10, 40, 100 Gbps) over a fixed distance of 2960 km. It does not consider the entire C-band or other spectral parameters, and practical/financial aspects of implementation are out of scope. Further investigations are needed for broader spectral evaluations.
1：Experimental Design and Method Selection:
The study used simulation and analytical modeling to evaluate power efficiency and regeneration impact. OptSimTM software was employed for BER simulations, and MATLAB was used for power consumption calculations based on transmission reach and component power data.
2：Sample Selection and Data Sources:
Simulations were based on ITU-T recommendation G.694.1 for channel spacing, with central channel wavelengths and frequency granularity of 6.25 GHz. Data from previous studies and equipment datasheets were used for power consumption values.
3：1 for channel spacing, with central channel wavelengths and frequency granularity of 25 GHz. Data from previous studies and equipment datasheets were used for power consumption values.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Software tools included OptSimTM and MATLAB. Equipment considered: transponders, 3R regenerators, ROADM multiplexers, WDM terminals, and optical line amplifiers, with power consumption values specified in tables.
4：Experimental Procedures and Operational Workflow:
Step 1: Simulate BER vs. channel spacing using OptSimTM to define transmission reach. Step 2: Develop a power consumption model in MATLAB, calculating the number of WDM components and overall power consumption for a 2960 km transmission distance. Step 3: Evaluate power efficiency by dividing power consumption by transmitted data volume.
5：Data Analysis Methods:
Statistical analysis of simulation results to derive power efficiency curves and 3R power ratios, comparing different modulation formats and channel spacings.
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