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Comparison of 8 x 112 Gb/s PS-QPSK and PDM-QPSK signals over transoceanic distances

: Nölle, M.; Fischer, J.K.; Molle, L.; Schmidt-Langhorst, C.; Peckham, D.; Schubert, C.

Postprint (1.3 MByte; PDF; )

Optics Express 19 (2011), No.24, pp.24370-24375
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer HHI ()

We experimentally investigate polarization-switched quadrature phase-shift keying (PS-QPSK) with a symbol rate of 37.3 GBd corresponding to a bit rate of 112 Gb/s. In a wavelength-division multiplexing (WDM) experiment with 50 GHz channel spacing, the transmission performance of PS-QPSK is compared to that of polarization-division multiplexed QPSK (PDM-QPSK) over an EDFA amplified ultra-large-effective-area fiber link. For a bit-error ratio (BER) of 3.8 x 10(-3), the achieved transmission distance is 11000 km for PS-QSPK and 10000 km for PDM-QPSK.