基于马赫-曾德尔调制器的先进调制格式的产生

何晶; 刘丽敏; 陈林; 文双春

中国激光, 2008, 35 (8): 1185, 网络出版: 2008-08-16

基于马赫-曾德尔调制器的先进调制格式的产生下载： 578次

Generation of Advanced Modulation Formats Based on Mach-Zehnder Modulators

论文大纲

何晶 ^*刘丽敏陈林文双春

作者单位

湖南大学计算机与通信学院, 湖南长沙 410082

摘要

提出了一种基于差分马赫-曾德尔调制器(MZM)产生80 Gbit/s高速率差分相移键控归零码(RZ-DPSK)、差分相移键控载波抑制归零码(CSRZ-DPSK)、差分正交相移键控归零码(RZ-DQPSK)、差分正交相移键控载波抑制归零码(CSRZ-DQPSK)的新方法。在采用两个差分MZM级联产生数据速率为80 Gbit/s的RZ/CSRZ-DPSK光信号的基础上,仅需增加一个双驱动MZM,就可以产生RZ/CSRZ-DQPSK信号,说明提出的方法有一定的扩展性,并简化了高速RZ/CSRZ-DQPSK光信号的产生过程。对产生的80 Gbit/s RZ/CSRZ-DPSK和RZ/CSRZ-DQPSK信号进行的仿真结果表明,CSRZ-DPSK信号比RZ-DPSK信号的频谱结构更加紧凑,差分正交相移键控(DQPSK)光谱形状与差分相移键控(DPSK)相同,只是由于RZ/CSRZ-DQPSK在码元速率下传输数据,得到的光谱在频域被压缩。

Abstract

A novel scheme, using differential Mach-Zehnder modulator (DMZM) for generation of 80 Gbit/s return-to-zero differential phase-shift keyed (RZ-DPSK), carrier-suppressed (CS) RZ-DPSK, return-to-zero differential quadrature phase-shift keyed (RZ-DQPSK) and CSRZ-DQPSK, is proposed. To generate RZ/CSRZ-DQPSK, it needs only to add a dual-drive MZM based on the 80 Gbit/s RZ/CSRZ-DPSK signal which is generated by a two differential cascaded MZM. The proposed method of the generation of RZ/CSRZ-DPSK and RZ/CSRZ-DQPSK is of expansibility and simplicity. Simulation results show that CSRZ-DPSK has a more compact spectrum than that of RZ-DPSK, while the DQPSK has a similar spectral shape to that of DPSK, with its spectrum being compressed by a factor of two due to the halved symbol rate for transmission at a fixed bit rate.

参考文献

[1] . Winzer, René-Jean Essiambre. Advanced optical modulation formats[J]. Proceedings of the IEEE, 2006, 94(5): 952-985.

[2] 陈新,吴克瑛,马晓红等. 光纤传输系统中基于相位预调制的信号整型[J]. 中国激光, 2007, 34(1):74～77

Chen Xin, Wu Keying, Ma Xiaohong et al.. Signal shaping based on phase pre-modulation in fiber transmission systems [J]. Chinese J. Lasers, 2007, 34(1):74～77

[3] A. Hirano, Y. Miyamoto, S. Kuwahara. Performances of CSRZ-DPSK and RZ-DPSK in 43 Gbit/s/h DWDM G652 single-mode-fiber transmission[C]. OFC, 2003, 2(ThE4):454～456

[4] . Nirmalathas, Dong-Soo Lee. RZ/CSRZ-DPSK and chirped NRZ signal generation using a single-stage dual-electrode Mach-Zehnder modulator[J]. IEEE Photon. Technol. Lett., 2004, 16(11): 2466-2468.

[5] R. A. Griffin, R. I. Johnstone, R. G.Walker et al.. 10 Gb/s optical differential quadrature phase shift key (DQPSK) transmission using GaAs/AlGaAs integration [C]. OFC, 2002, FD6

[6] . C. Cartledge. Performance of 10 Gb/s lightwave systems based on lithium niobate Mach-Zehnder modulators with asymmetric Y-branch waveguides[J]. IEEE Photon. Technol. Lett., 1995, 7(9): 1090-1092.

[7] 齐鸣,张新亮,黄德修. 可调马赫-曾德尔干涉仪型差分相移键控解调器[J]. 中国激光, 2006, 33(12):1643～1647

Qi Ming, Zhang Xinliang, Huang Dexiu. Tunable differential phase-shift keying demodulator using the Mach-Zehnder interferometer [J]. Chinese J. Lasers, 2006, 33(12):1643～1647

何晶, 刘丽敏, 陈林, 文双春. 基于马赫-曾德尔调制器的先进调制格式的产生[J]. 中国激光, 2008, 35(8): 1185. He Jing, Liu Limin, Chen Lin, Wen Shuangchun. Generation of Advanced Modulation Formats Based on Mach-Zehnder Modulators[J]. Chinese Journal of Lasers, 2008, 35(8): 1185.

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