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Interplay of Pulse Shaping and Pre-Emphasis for High Symbol Rate Coherent Transmission Systems | IEEE Conference Publication | IEEE Xplore

Interplay of Pulse Shaping and Pre-Emphasis for High Symbol Rate Coherent Transmission Systems


Abstract:

Digital pre-emphasis (DPE) in optical communications has been proposed to counteract transceiver bandwidth limitations, enabling higher symbol rate transmission with low ...Show More

Abstract:

Digital pre-emphasis (DPE) in optical communications has been proposed to counteract transceiver bandwidth limitations, enabling higher symbol rate transmission with low bandwidth opto-electronic components. However, system design trade-offs for diverse regimes of weak and strong pre-emphasis largely remain unexplored.In this paper, we model 32 Gbaud commercial transceivers’ component behaviour to enable DPE-aided 64 Gbaud operation, as opposed to high bandwidth components’ utilization. We systematically investigate the interplay of DPE parameters for multi-component pre-emphasis, and its impact on available transmitter output power and transmission performance. In particular, we consider 64 Gbaud dual polarization quadrature amplitude modulation (DP-x-QAM), x = 4, 16, 64, enabling 200 Gb/s, 400 Gb/s and 600 Gb/s line rates, and show that DPE may offer performance gains of up to ~4.6 dB, compared to no DPE, however with an associated output power loss of up to ~9 dB. Furthermore, we report that at −16 dBm target optical output power, DP-QPSK shows highest net performance loss, compared to maximal performance, followed by DP-16QAM and DP-64QAM.
Date of Conference: 01-05 July 2018
Date Added to IEEE Xplore: 27 September 2018
ISBN Information:
Electronic ISSN: 2161-2064
Conference Location: Bucharest, Romania

References

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