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- W2807656578 abstract "A 850 nm single-mode vertical cavity surface emitting laser (VCSEL)-based data transmission is demonstrated, enabling four-level pulse amplitude modulation (PAM-4) at 64 Gbit/s over 100–300 m in an OM4 multi-mode fiber (MMF). By optimizing the bias of the single-mode VCSEL with a differential resistance of 159 Ω, the related electrical return loss of −5.7 dB is determined to provide an analog modulation bandwidth of 18.9 GHz. After pre-emphasizing the waveform of the PAM-4 format, the PAM-4 data stream can be successfully delivered by the single-mode VCSEL at 64 Gbit/s under back-to-back and 100 m long OM4 MMF conditions. Lengthening the transmission distance worsens the signal-to-noise ratio (SNR) of PAM-4 data to the FEC criterion, as the waveform pre-emphasis of the PAM-4 data stream inevitably induces spectral power compensation from low to high frequencies. Therefore, increasing the OM4 MMF distance from 200 to 300 m significantly reduces the peak-to-peak amplitude of data to suppress the SNR and reduce the transmission capacity from 52 to 48 Gbit/s." @default.
- W2807656578 created "2018-06-13" @default.
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- W2807656578 date "2018-06-06" @default.
- W2807656578 modified "2023-10-18" @default.
- W2807656578 title "Single-mode VCSEL for pre-emphasis PAM-4 transmission up to 64 Gbit/s over 100–300 m in OM4 MMF" @default.
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- W2807656578 doi "https://doi.org/10.1364/prj.6.000666" @default.
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