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Conferences > OFC > 2017 > Th4C > Th4C.6

Optical 16-QAM Signal Homodyne Detection by Extracting +/−π/4 and +/−3π/4-Phase Symbols

A. Mizutori, T. Abe, T. Kodama, and M. Koga

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Abstract

This paper demonstrates, for the first time, stable 16-Gbit/s 16-QAM signal homodyne detection. By extracting +/−π /4 and +/−3π/4-Phase data symbols from 16-QAM optical signal, our decision-driven Costas loop for QPSK code achieved the local oscillator light phase-locking to the signal carrier wave modulated at 16-QAM. Homodyne phase-lock is confirmed in an experiment by observing eye opening of 4-level amplitude modulation signals in I- and Q-arm.

© 2017 Optical Society of America

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