摘要
In this paper,we propose a novel and flexible 16-quadrature amplitude modulation(16QAM) transmitter based on cascaded dual-parallel Mach-Zehnder modulator(DPMZM) and phase modulator(PM).The proposed transmitter is able to generate three types of 16QAM signals:square 16QAM,star 16QAM and four-amplitude-four-phase-16-QAM(FAFP-16QAM).The feasibility of the transmitter is verified through experiment,20-Gb/s eye diagrams of the 16QAM signals are obtained.In order to evaluate the performances of the 16QAM signals,simulations are also conducted using VPI Transmission Maker,clear constellations of 40-Gb/s 16QAM signals are achieved by coherent detection.
In this paper, we propose a novel and flexible 16-quadrature amplitude modulation （16QAM） transmitter based on cascaded dual-parallel Mach-Zehnder modulator （DPMZM） and phase modulator （PM）. The proposed transmitter is able to generate three types of 16QAM signals： square 16QAM, star 16QAM and four-amplitude-four-phase-16-QAM （FAFP-16QAM）. The feasibility of the transmitter is verified through experiment, 20-Gb/s eye diagrams of the 16QAM signals are obtained. In order to evaluate the performances of the 16QAM signals, simulations are also conducted using VPI Transmission Maker, clear con- stellations of 40-Gb/s 16QAM signals are achieved by coherent detection.
基金
supported by the National Natural Science Foundation of China (Grant Nos.61077052 and 61125504)
the National High-Tech Research & Development Program of China ("863" Program) (Grant No. SS2013AA010502)
