Net-400-Gbps PS-PAM transmission using integrated AMUX-MZM

Simple high-speed optical transmission technologies are desired for use in intra-and inter-datacenter networks. In this study, we demonstrate simple single-carrier intensity-modulated direct-detection (IMDD) transmissions at a net data rate of 400 Gbps (516.7 Gbps gross) over 20 km with a compact tr...

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Veröffentlicht in:Optics express 2019-09, Vol.27 (18), p.25544-25550
Hauptverfasser: Yamazaki, Hiroshi, Nakamura, Masanori, Kobayashi, Takayuki, Nagatani, Munehiko, Wakita, Hitoshi, Ogiso, Yoshihiro, Nosaka, Hideyuki, Hashimoto, Toshikazu, Miyamoto, Yutaka
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Sprache:eng
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Zusammenfassung:Simple high-speed optical transmission technologies are desired for use in intra-and inter-datacenter networks. In this study, we demonstrate simple single-carrier intensity-modulated direct-detection (IMDD) transmissions at a net data rate of 400 Gbps (516.7 Gbps gross) over 20 km with a compact transmitter subassembly. The subassembly consists of a 2:1 analog multiplexer (AMUX) and an InP Mach-Zehnder modulator (MZM) placed close to each other and connected via wires. We employed 162-Gbaud single-carrier probabilistically shaped pulsed amplitude modulation (PS-PAM). The baseband signals with a bandwidth of around 81 GHz to drive the MZM were generated by a super-digital-to-analog converter (super-DAC) consisting of two sub-DACs and the AMUX. Digital nonlinear pre-distortion enabled us to transmit the signals with normalized generalized mutual information (NGMI) larger than the threshold of a soft-decision forward error correction (SD-FEC) code of 0.857. Truncation of the PS-PAM symbol distribution further enhanced performance. To the best of our knowledge, this is the first net-400-Gbps single-carrier IMDD transmission using a compact transmitter subassembly.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.27.025544