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Updated: May 25, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Ultra-long-haul transmission of 7×42.9 Gbit/s PS-QPSK and PDM-BPSK
Carsten Behrens1, Domaniç Lavery, David S Millar
1Optical Networks Group, Department of Electronic and Electrical Engineering, University College London (UCL), Torrington Place, London WC1E 7JE, UK. cbehrens@ee.ucl.ac.uk
Abstract:
We investigated ultra-long-haul transmission of polarization-switched QPSK (PS-QPSK) and polarization-division-multiplexed BPSK (PDM-BPSK) at 42.9 Gbit/s experimentally as well as by means of computer simulations. PDM-BPSK allowed transmission distances in excess of 14,040 km to be achieved, compared to 13,640 km for PS-QPSK. However, PS-QPSK offers a significant reduction in receiver complexity due to the lower symbol-rate.
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