Comparison between MZI and single phase modulator for generating 112 Gbit/s PDM-QPSK signal

被引：0
作者：
Wang, Junyi [1 ]
Gao, Kailu [1 ]
Yang, Lu [1 ]
He, Xuan [1 ]
Pan, Z. [1 ]
机构：
[1] Univ Louisiana Lafayette, Dept Elect & Comp Engn, Lafayette, LA 70504 USA
来源：
OPTICAL TRANSMISSION SYSTEMS, SWITCHING, AND SUBSYSTEMS VIII | 2011年 / 7988卷
关键词：
Coherent detection; Polarization division multiplexing; QPSK; Phase modulator; Mach zehnder interferometer; Inter symbol interference; Dispersion compensation; Nonlinearity tolerance;
D O I：
10.1117/12.887400
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We demonstrated the QPSK signal generated by a single phase-modulator (PM-QPSK) is more tolerant to nonlinearity than that generated by the Mach Zehnder Interferometer (MZI-QPSK). With simulation of WDM system at 28 Gsymbol/s per polarization the performance of PM-QPSK and MZI-QPSK are compared when dispersion management is used. After 800 km's transmission in single-polarization transmission system, MZI-QPSK outperforms PM-QPSK because of its better tolerance to ISI. After 400 km's transmission in polarization multiplexing system, PM-QPSK outperforms MZI-QPSK by comparing the symbol error ratio with optimized launch power, which is because PM-QPSK has better nonlinearity tolerance in dispersion managed system.
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页数：6
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