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Partial Pre-Emphasis for Pluggable 400 G Short-Reach Coherent Systems

Author

Listed:
  • Ahmad Abdo

    (School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada)

  • Xueyang Li

    (Department of Electrical and Computer Engineering, McGill University, Montreal, QC H3A 2A7, Canada)

  • Md Samiul Alam

    (Department of Electrical and Computer Engineering, McGill University, Montreal, QC H3A 2A7, Canada)

  • Mahdi Parvizi

    (Ciena Corporation, Ottawa, ON K2K 0L1, Canada)

  • Naim Ben-Hamida

    (Ciena Corporation, Ottawa, ON K2K 0L1, Canada)

  • Claude D’Amours

    (School of Electrical Engineering and Computer Science, University of Ottawa, Ottawa, ON K1N 6N5, Canada)

  • David Plant

    (Department of Electrical and Computer Engineering, McGill University, Montreal, QC H3A 2A7, Canada)

Abstract

Pre-emphasis filters are used to pre-compensate for the transmitter frequency response of coherent systems to mitigate receiver noise enhancement. This is particularly essential for low-cost, low-power coherent transceivers due to having an extremely bandlimited transmitter. However, the pre-emphasis filter also increases the signal peak-to-average power ratio (PAPR), thus posing a higher effective number of bits (ENoB) requirement for the arbitrary waveform generator (AWG). In this paper, we first numerically study the PAPR impact of partial pre-emphasis filters. We show that with partial pre-emphasis, an ENoB reduction from 5 to 4.5 bits is attainable at the same signal-to-noise ratio (SNR) out of the AWG. Next, we experimentally investigate the overall performance penalty of partial pre-emphasis in a 50 Gbaud 16QAM coherent system. A manageable Q factor penalty of around 0.5 dB is found for both single-polarization and dual-polarization systems with a 0.8 dB PAPR reduction.

Suggested Citation

  • Ahmad Abdo & Xueyang Li & Md Samiul Alam & Mahdi Parvizi & Naim Ben-Hamida & Claude D’Amours & David Plant, 2019. "Partial Pre-Emphasis for Pluggable 400 G Short-Reach Coherent Systems," Future Internet, MDPI, vol. 11(12), pages 1-10, December.
    • Handle: RePEc:gam:jftint:v:11:y:2019:i:12:p:256-:d:296574
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    References listed on IDEAS

    as
    1. Ahmad Abdo & Sadok Aouini & Bilal Riaz & Naim Ben-Hamida & Claude D’Amours, 2019. "Adaptive Coherent Receiver Settings for Optimum Channel Spacing in Gridless Optical Networks," Future Internet, MDPI, vol. 11(10), pages 1-13, September.
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    1. Ahmad Abdo & Claude D’Amours, 2020. "Adaptive Pre/Post-Compensation of Cascade Filters in Coherent Optical Transponders," Future Internet, MDPI, vol. 12(2), pages 1-18, January.

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