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We present a 10 channel, polarization-multiplexed QPSK receiver photonic integrated circuit, with 25 GHz channel spacing, operating at 28 Gbaud (112 Gbit/s per channel). With 10 channels operating, this is a Terabit Superchannel receiver.
In this paper we review recent developments in the area of receiver photonic integrated circuits for the implementation of polarization multiplexed (differentially coded), quadrature phase shift keying (DQPSK) transmission formats.
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