研究目的
Investigating the potential of dense space division multiplexed (DSDM) transmission over multicore and multimode fiber for long-haul transport systems to achieve capacities beyond petabit/s.
研究成果
The study concludes that DSDM transmission using multicore and/or multimode fiber is a promising approach for achieving ultra-high capacity long-haul transport systems. Key technologies such as low crosstalk fibers, efficient amplification schemes, and advanced signal processing are essential for extending the reach of such systems.
研究不足
The study highlights the challenges in achieving low crosstalk, large effective areas, and uniform amplification across multiple spatial channels. It also points out the need for advanced signal processing to manage mode-dependent losses and delays.
1：Experimental Design and Method Selection:
The study reviews recent progress on SDM transmission and proposes DSDM with over 30 spatial channels. It discusses requirements for long-haul DSDM transport systems, including amplification schemes, fiber design, and signal processing techniques.
2：Sample Selection and Data Sources:
The study uses multicore and multimode fibers, specifically a graded index heterogeneous 12-core × 3-mode fiber, for transmission experiments.
3：List of Experimental Equipment and Materials:
Equipment includes Erbium-doped fiber amplifiers, parallel multiple-input and multiple-output signal processing units, and MDL equalization technologies.
4：Experimental Procedures and Operational Workflow:
The study involves long-distance transmission experiments using polarization-division multiplexed 16-quadrature amplitude modulation signaling over the specified fiber.
5：Data Analysis Methods:
The analysis focuses on the performance metrics such as crosstalk, DMD, and MDL, and their impact on transmission capacity and distance.
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