Wavelength Dependence of Optimum Core-to-Cladding Ratio for Power Efficient Cladding-Pumped Coupled Multi-Core EDFA

Article Engineering, Electrical & Electronic

Long-Haul WDM/SDM Transmission Over Coupled 4-Core Fiber With Coupled 4-Core EDFA and Its Mode Dependent Loss Characteristics Estimation

Manabu Arikawa et al.

Summary: We demonstrated a successful long-haul WDM and SDM transmission of 32-Gbaud polarization-division multiplexed quadrature phase-shift keying signals. Our experiment showed that the mode dependent loss (MDL) of the coupled-4-core EDFAs was a major limiting factor for transmission performance, and the rms MDL per span should be below 0.4 dB for further long-haul transmission distance over 6000 km.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2022)

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Article Engineering, Electrical & Electronic

50.47-Tbit/s Standard Cladding Coupled 4-Core Fiber Transmission Over 9,150 km

Daiki Soma et al.

Summary: The transmission capacity of optical submarine cable systems needs to be continuously increased, with research suggesting that single-band transmission systems with more fiber pairs could be a promising technology. Utilizing space-division multiplexing technologies such as multi-core fibers may offer solutions for further increasing transmission capacity.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic

Characteristics of Randomly Coupled 12-core Erbium-Doped Fiber Amplifier

Taiji Sakamoto et al.

Summary: By adjusting the length of the erbium-doped fiber, a 12-core EDFA can operate in both C and L bands, demonstrating good amplification characteristics and applicability for inline amplified transmission systems. The study found that for long-distance SDM transmission, MDL impacts the power efficiency of randomly coupled multi-core EDFAs.

JOURNAL OF LIGHTWAVE TECHNOLOGY (2021)

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Article Engineering, Electrical & Electronic