| Mach-Zehnder电光波导调制器啁啾的研究 |
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| 引用本文： | 甘小勇,刘永智,张晓霞,张长命.Mach-Zehnder电光波导调制器啁啾的研究[J].应用光学,2004,25(2):11-14. |
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| 作者姓名： | 甘小勇 刘永智 张晓霞 张长命 |
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| 作者单位： | 电子科技大学,光电信息学院,成都,610054 |
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| 摘 要： | 在光纤通信系统中,调制器的啁啾参数是衡量调制器性能的重要参数之一.为了深入研究铌酸锂M-Z结构外调制的机理,导出了Mach-Zehnder结构外调制方式调制器的啁啾参数表达式,研究表明该结构调制器频率啁啾不为零,而且调制器的直流偏置漂移对啁啾的影响很小.详细讨论了影响啁啾参数的因素,分析了直流消光比、外加信号以及直流偏置漂移对器件啁啾参数的影响.分析结果表明,利用负啁啾可以改善系统的色散特性.
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| 关 键 词： | 频率啁啾 电光调制器 Mach-Zehnder干涉仪 铌酸锂 |
| 文章编号： | 1002-2082(2004)02-0011-04 |
| 收稿时间： | 2003/3/30 |
Chirp Investigation for Electrooptic Waveguide Modulators with Mach-Zehnder structure |
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| GAN Xiao-yong,LIU Yong-zhi,ZHANG Xiao-xia,ZHANG Chang-ming.Chirp Investigation for Electrooptic Waveguide Modulators with Mach-Zehnder structure[J].Journal of Applied Optics,2004,25(2):11-14. |
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| Authors: | GAN Xiao-yong LIU Yong-zhi ZHANG Xiao-xia ZHANG Chang-ming |
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| Institution: | School of Optic-Electronic Information of UESTC, Chengdu 610054, China |
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| Abstract: | The chirp parameter of modulators is an important index of performance evaluation in fiber-optic communicalion system. We deduced the expression of the chirp parameter of LiNbO_3 external modulator with Mach-Zehnder structure. It shows that frequency chirp in this structure modulator is not equal to zero and the effect of bias voltage on the chirp parameter can be eliminated. The effect of DC extinction ratio, applied electrical signal and DC bias voltage was analyzed. It shows that negative chirp can improve the dispersion characteristics of system. |
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| Keywords: | frequency chirp electrooptic modulator Mach-Zehnder interferometer lithium niobate |
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