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The sensitivity of polarization-switched QPSK (PS-QPSK) is compared to polarization-division-multiplexed QPSK (PDM-QPSK) and BPSK (PDM-BPSK) at a constant bitrate (12.5 Gbit/s). PS-QPSK is found to achieve the theoretical sensitivity advantage of 1.76 dB over PDM-BPSK.
© 2011 Optical Society of America
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