Paper
26 July 2022 Optimization of EDFA position for high speed short reach PAM4 optical fiber communication systems
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Abstract
In this paper, the position of erbium-doped fiber amplifier (EDFA) in an intensity-modulation and direct-detection (IM/DD) optical fiber communication system is optimized to suppress a part of chromatic dispersion (CD) caused distortions and alleviate the burden of digital signal processing. The results demonstrate that, for a system with a certain signal rate and launch optical power, the transmission fiber length is longer with optimizing the position of the EDFA. If a 20% overhead soft-decision forward error correction threshold of 2.7×10−2 is considered, the CD-uncompensated transmission fiber length of a 50 Gb/s four-level pulse amplitude modulation (PAM4) system can be increased by 34.78% compared with the non-optimized system. Moreover, the launch optical power of the optimized system can be decreased by 6 dB.
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Zhe Zhao, Aiying Yang, and Guo Peng "Optimization of EDFA position for high speed short reach PAM4 optical fiber communication systems", Proc. SPIE 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 122780H (26 July 2022); https://doi.org/10.1117/12.2616458
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KEYWORDS
Optical amplifiers

Digital signal processing

Modulators

Fiber optic communications

Modulation

Nonlinear optics

Receivers

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