An Integrated Core-Pumped 4-Core Erbium-Doped Fiber Amplifier with Low Differential Core Gain

We demonstrate an integrated core-pumped 4-core erbium-doped fiber amplifier (4C-EDFA) that achieves a record-low differential core gain of 0.5 dB across the whole C-band. This is enabled by utilizing a 4C-EDF with a minimal core-dependent absorption coefficient and passive devices with low core-dependent loss. The 4C-EDFA also exhibits an average gain of 15.50 dB, an average output power of 22.5 dBm, and a maximum noise figure of 4.91 dB. Furthermore, simulations on a 4-core fiber (4CF) transmission link confirm that the proposed 4C-EDFA can support transmission exceeding 10,000 km with a minimal inter-core Q2 difference of only 0.5 dB. Here, Q2 is defined as the ratio of the mean received signal levels to the corresponding noise variances. It is a critical metric in optical systems to quantify the signal quality, which highlights its potential for high-capacity and long-haul uncoupled 4CF systems.

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Publication Details

Journal
Photonics
Published
2025-11-06
DOI
https://doi.org/10.3390/photonics12111094
Primary Topic
Optical Network Technologies
Type
article
Field-Weighted Citation Impact
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article

An Integrated Core-Pumped 4-Core Erbium-Doped Fiber Amplifier with Low Differential Core Gain

Zhiqun Yang, Yanze Wang, Zhanhua Huang, Shigui Zhang et al.
Photonics
Optical Network Technologies
article

An Integrated Core-Pumped 4-Core Erbium-Doped Fiber Amplifier with Low Differential Core Gain

Zhiqun Yang, Yanze Wang, Zhanhua Huang, Shigui Zhang, Tao Xu, Jianping Li, Bowen Zhang, Yan‐Feng Wang, Yue Shao, Minghao Liu, Yaping Liu, Liping Ma, Yanpu Wang, Xiaochuan Liu
article en

Abstract

We demonstrate an integrated core-pumped 4-core erbium-doped fiber amplifier (4C-EDFA) that achieves a record-low differential core gain of 0.5 dB across the whole C-band. This is enabled by utilizing a 4C-EDF with a minimal core-dependent absorption coefficient and passive devices with low core-dependent loss. The 4C-EDFA also exhibits an average gain of 15.50 dB, an average output power of 22.5 dBm, and a maximum noise figure of 4.91 dB. Furthermore, simulations on a 4-core fiber (4CF) transmission link confirm that the proposed 4C-EDFA can support transmission exceeding 10,000 km with a minimal inter-core Q2 difference of only 0.5 dB. Here, Q2 is defined as the ratio of the mean received signal levels to the corresponding noise variances. It is a critical metric in optical systems to quantify the signal quality, which highlights its potential for high-capacity and long-haul uncoupled 4CF systems.

PhotonicsVol. 12(11)
Tianjin University (CN), CM Technologies (United States) (US)
National Natural Science Foundation of China, Natural Science Foundation of Tianjin City
Openalex Percentile: Top 67%
Optical Network Technologies
DOIOpen Access PDFOpenAlex
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An Integrated Core-Pumped 4-Core Erbium-Doped Fiber Amplifier with Low Differential Core Gain — Zhiqun Yang, Yanze Wang, et al. · Photonics (2025) | TGRS Research Map | TGRS