半导体光放大器中超快增益压缩效应与TOAD开关性能优化

在半导体光放大器中当光脉冲小于１０ｐｓ时除了考虑线性增益饱和效应，还必须考虑超快增益压缩效压。本文用数值方法分析了超快增益压缩效应对ＴＨｚ光非对称解复用器（ＴＯＡＤ）的开关特性。经过细致的参数优化，采用２．５ｐｓ控制光，可以克服开关窗的分裂效应，得到一个宽度为２．０ｐｓ，消光比为１３．７ｄＢ的开关窗。

Switching Performance Optimization of the TOAD Concerning Ultrafast Gain Compression in the SOA

Ultrafast ga in compression has to be considered besides the linear gain saturation when opti cal pulses shorter than 10 ps are involved in semiconductor optical amplifiers ( SOA).In this paper,the influence of the ultrafast gain compression on the switch ing performance of a THz optical asymmetric demultiplexer (TOAD) due to ca rrier heating and other nonlinear processes in the SOA is numerically analyzed.I t is shown that the breakup effect of the switching window can be circumvented a nd a window width of 2.0 ps with an extinction ratio of 13.7 dB can be achieved at a control pulsewidth of 2.5 ps through careful parameter optimization.