Calibration of High-Speed Time-Interleaving DAC

Zhang, Ke; Su, Xiaofei; Nakashima, Hisao; Hoshida, Takeshi; Tao, Zhenning

doi:10.23919/ofc49934.2023.10116268

2023 Optical Fiber Communications Conference and Exhibition (OFC) 2023

DOI: 10.23919/ofc49934.2023.10116268

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Calibration of High-Speed Time-Interleaving DAC

Ke Zhang,

Xiaofei Su,

Hisao Nakashima

et al.

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2024

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Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

Dai,

Zhang,

Cao

et al. 2024

Commun Eng

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For 800 Gbps/λ and beyond optical transmission systems, frequency-dependent impairments (FDI) degrade coherent optical transceiver (CO-TRx) performance severely. Calibration and compensation of such FDI in factories includes amplitude/phase frequency response (AFR/PFR), skew, and ripple for both transmitters(Tx) and receivers (Rx). However, due to the polarization rotation and phase rotation effects in optical link, the separation and extraction of FDI from different polarization or I/Q tributaries is challenging. Here we report a FDI calibration method based on orthogonal separation scheme and frequency domain analysis. The proposal can simultaneously characterize and separate the Tx/Rx sides FDI including AFR, PFR, and time skew of four tributaries. Finally, the effectiveness is demonstrated by transmitting a 96 GBuad Nyquist-16QAM signal on a 64 GBaud-class CO-TRx.

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Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

Dai,

Zhang,

Cao

et al. 2024

Commun Eng

View full text Add to dashboard Cite

show abstract

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Calibration of High-Speed Time-Interleaving DAC

Cited by 1 publication

References 4 publications

Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

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