We propose a polarization-multiplexing QPSK modulator for 16 QAM generation. 16 QAM is synthesized from two QPSK signals with orthogonal polarization by a polarizer. Generation of 40 Gb/s 16 QAM with the BER of 8.13×10-6 was demonstrated.
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Optical Communication (ECOC), 2010 36th European Conference and Exhibition on
Date of Conference: 19-23 Sept. 2010