Adaptive 4∼64 QAM real-time coherent optical transmission over 320 km with FPGA-based transmitter and receiver

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11 Citations (Scopus)

Abstract

We demonstrate the first real-time adaptive optical coherent QAM transmission with variable multiplicities (4-, 16- and 64-QAM) using an FPGA-based transmitter and receiver. Rate-variable transmission (20∼60 Gbit/s) was successfully achieved with a polarization multiplexing scheme at 5 Gsymbol/s over 320 km, where the OSNR margins were increased by 9 and 17 dB, respectively, by changing the modulation level from 64 to 16 and 4.

Original languageEnglish
Pages (from-to)16520-16527
Number of pages8
JournalOptics Express
Volume22
Issue number13
DOIs
Publication statusPublished - 2014 Jun 30

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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