Nelson, LE,Zhou, X,Mac Suibhne, N,Ellis, AD,Magill, P;

2011

January

Optics Express

Experimental comparison of coherent polarization-switched QPSK to polarization-multiplexed QPSK for 10 x 100 km WDM transmission

Validated

()

EQUALIZATION MODULATION

19

10849

10856

Polarization-switched quadrature phase-shift keying has been demonstrated experimentally at 40.5Gb/s with a coherent receiver and digital signal processing. Compared to polarization-multiplexed QPSK at the same bit rate, its back-to-back sensitivity at 10(-3) bit-error-ratio shows 0.9dB improvement, and it tolerates about 1.6dB higher launch power for 10 x 100km, 50GHz-spaced WDM transmission allowing 1dB penalty in required optical-signal-to-noise ratio relative to back-to-back. (C) 2011 Optical Society of America