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19-core MCF transmission system using EDFA with shared core pumping coupled via free-space optics
Optics Express
|February 12, 2014
Summary
A new 19-core fiber and Erbium-doped fiber amplifier (EDFA) enable space division multiplexing (SDM) transmission. This system achieved low crosstalk and demonstrated feasibility for long-haul, high-speed data transmission.
Area of Science:
- Optical Communications
- Fiber Optics Engineering
- Telecommunications Technology
Background:
- Space Division Multiplexing (SDM) is a key technology for increasing fiber optic transmission capacity.
- Existing SDM systems face challenges with inter-core crosstalk and amplifier integration.
- Development of advanced multi-core fibers and compatible amplifiers is crucial for next-generation networks.
Purpose of the Study:
- To develop and demonstrate a novel Space Division Multiplexing (SDM) transmission system.
- To evaluate the performance of a new 19-core fiber with improved core arrangement.
- To assess the efficacy of a 19-core Erbium-doped fiber amplifier (EDFA) for SDM applications.
Main Methods:
- Utilized a newly designed 19-core fiber with enhanced core arrangement over a 30 km link.
- Employed a 19-core Erbium-doped fiber amplifier (EDFA) with shared free-space optics for pump combining and isolation.
- Transmitted 100 Gb/s Polarization Division-Multiplexed Quadrature Phase-Shift Keying (PDM-QPSK) signals to assess system feasibility.
Main Results:
- Achieved a low aggregated inter-core crosstalk of -42 dB at 1550 nm across the 30 km fiber.
- The 19-core EDFA provided channel gains ranging from 19.6 dB to 23.3 dB with noise figures between 6.0 dB and 7.0 dB.
- Successfully demonstrated system feasibility for SDM transmission over a 1200 km link.
Conclusions:
- The developed 19-core fiber and SDM-transparent EDFA represent a significant advancement in optical transmission technology.
- The system's low crosstalk and effective amplification pave the way for higher capacity fiber optic networks.
- The successful long-haul demonstration confirms the potential of this SDM system for future telecommunications infrastructure.
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