Modulation characteristics of semiconductor Mach-Zehnder optical modulators

被引:22
作者
Lawetz, C [1 ]
Cartledge, JC [1 ]
Rolland, C [1 ]
Yu, J [1 ]
机构
[1] QUEENS UNIV,DEPT ELECT & COMP ENGN,KINGSTON,ON K7L 3N6,CANADA
基金
加拿大自然科学与工程研究理事会;
关键词
Mach-Zehnder modulator; modulator chip; semiconductor optical modulator;
D O I
10.1109/50.566692
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
The transmission and chirp characteristics are described for two types of semiconductor Mach-Zehnder modulators, distinguished by the differential phase shift between the two arms of the interferometer in the unbiased state. The conventional modulator has a differential phase shift of 0 radians, while the pi-shift modulator has a differential phase shift of pi radians. The nonlinear dependence on the applied voltage of the attenuation and phase constants of the optical signal propagating in the p-i-n waveguide leads to different characteristics for the two modulators. The influence of the splitting ratio of the Y-junctions is considered for single-arm and dual-arm (push-pull) modulation formats. The pi-shift modulator is shown to yield better transmission performance for 10 Gb/s systems compared to the conventional modulator.
引用
收藏
页码:697 / 703
页数:7
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