非线性增益压缩对TOAD开关特性的影响

应用科学学报 ›› 2001, Vol. 19 ›› Issue (3): 224-227.

非线性增益压缩对TOAD开关特性的影响

逄焕刚, 张志远, 颜森林, 孙小菡, 张明德

东南大学电子工程系, 江苏南京 210096

收稿日期:2000-06-28 修回日期:2001-01-05 出版日期:2001-09-30 发布日期:2001-09-30
作者简介:逄焕刚(1969-),男,山东胶南人,博士生;孙小菡(1955-),女,安徽合肥人,教授,博导;张明德(1939-),男,上海人,教授,博导.
基金资助:
江苏省自然科学基金资助项目(BK97012)

Influences of Nonlinear Gain Compression on Switching Characteristics of TOAD

PANG Huan-gang, ZHANG Zhi-yuan, YAN Sen-lin, SUN Xiao-han, ZHANG Ming-de

Department of Electronic Engineering, Southeast University, Nanjing 210096, China

Received:2000-06-28 Revised:2001-01-05 Online:2001-09-30 Published:2001-09-30

摘要/Abstract

摘要： 考虑半导体光放大器(SOA)的增益饱和与非线性增益压缩效应,详细研究了非线性增益压缩对太赫兹光非对称解复用器(TOAD)开关特性的影响,并首次提出了有效开关窗口宽度的概念.数值计算结果表明,非线性增益压缩对开关窗口形状影响显著.SOA非线性增益压缩越大,输出对SOA在环内的位置越敏感;若它较小,则控制脉冲能量对有效开关窗口宽度影响很大;只有当控制脉冲较窄时有效开关窗口宽度才会受非线性增益压缩的影响;当非线性增益压缩较小且SOA偏离环中点不大时,有效开关窗口宽度较小.

关键词: 非线性增益压缩, 开关特性, 太赫兹光非对称解复用器, 有效开关窗口宽度

Abstract: In this paper, the influences of nonlinear gain compression (NGC) on switching characteristics of a terahertz optical asymmetric demultiplexer (TOAD) are investigated thoroughly by taking into account the gain saturation and NGC effects of semiconductor optical amplifier (SOA). And a concept of effective switching window width is presented for the first time. It is shown that the switching window shape is influenced dramatically by the NGC. The bigger NGC is, the more sensitive is the TOAD output to the position of the SOA. If the NGC is small, however, the control pulse energies will have great effects on the effective switching window width. Only when the control pulse is narrow, will the effective switching window width be influenced by the NGC. The effective switching window width will be small if the NGC and the distance between the SOA and the midpoint of the loop are small.

Key words: WTBZterahertz optical asymmetric demultiplexer, nonlinear gain compression, switching characteristics, effective switching window width

中图分类号:

TN911.74

逄焕刚, 张志远, 颜森林, 孙小菡, 张明德. 非线性增益压缩对TOAD开关特性的影响[J]. 应用科学学报, 2001, 19(3): 224-227.

PANG Huan-gang, ZHANG Zhi-yuan, YAN Sen-lin, SUN Xiao-han, ZHANG Ming-de. Influences of Nonlinear Gain Compression on Switching Characteristics of TOAD[J]. Journal of Applied Sciences, 2001, 19(3): 224-227.