研究目的
To present an analytical expression for residual chromatic dispersion and self-phase modulation optimal compensation in the fractional domain and verify its accuracy through simulation.
研究成果
The analytical expression for residual CD and SPM optimal compensation is presented and its accuracy confirmed by simulation. The multi-step search method reduces computation complexity while maintaining measurement accuracy. The simulation of a 28-GBd RZ-DQPSK system verifies the expression's correctness for transmission distances less than 800 km in SSMF and NZDSF.
研究不足
The correctness of the analytical expression is verified when the transmission distance is less than 800 km in standard single-mode fiber and non-zero dispersion-shifted fiber.
1：Experimental Design and Method Selection:
Utilizes the chirp characteristic of a chirped Gaussian pulse in the fractional domain and the split-step Fourier method for simulation.
2：Sample Selection and Data Sources:
A 28-GBd RZ-DQPSK optical fiber communication system is simulated.
3：List of Experimental Equipment and Materials:
Simulation platform based on the split-step Fourier method, VPI software for optical fiber communication system simulation.
4：Experimental Procedures and Operational Workflow:
The process involves calculating the slope of the fractional domain for the transmitted signal, adding SPM and CD effects, and comparing with the original slope to find optimal compensation.
5：Data Analysis Methods:
The accuracy of the analytical expression is confirmed by comparing simulation results with theoretical predictions.
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