摘要
在考虑了太赫兹光非对称解复用器 (TOAD)中半导体光放大器 (SOA)的增益饱和与恢复效应的基础上 ,深入研究了超高斯控制脉冲对半导体光放大器的动态增益响应及太赫兹光非对称解复用器开关特性的影响 ,并与高斯控制脉冲的情形进行了比较。结果表明 :相对于高斯控制脉冲而言 ,超高斯控制脉冲使半导体光放大器的增益转折区减小 ,显著影响太赫兹光非对称解复用器的开关窗口形状 ,当信号光相对于控制光时延一定 ,或环时间非对称性及信号光相对于控制光的全部时延一定时 。
The influences of super Gaussian control pulse on dynamic gain response of the semiconductor optical amplifier (SOA) and switching characteristics of a terahertz optical asymmetric demultiplexer (TOAD) are studied in detail by considering the effects of gain saturation and recovery of SOA. The results are compared with the case of a Gaussian control pulse. It is shown that the super Gaussian control pulse will decrease the gain transition region of SOA and affect significantly the shape of the switching window of TOAD. When the time delay between the signal and control pulse is fixed, or the loop′s time asymmetry and the time delay between the signal and control pulse are all fixed, the maximum switching contrast of TOAD will be reduced due to the using of a super Gaussian control pulse.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2001年第7期886-890,共5页
Acta Optica Sinica
基金
江苏省自然科学基金 (BK970 12 )资助课题
