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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Rising and falling time of amplified picosecond optical pulses by semiconductor optical amplifiers
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Rising and falling time of amplified picosecond optical pulses by semiconductor optical amplifiers

机译：半导体光放大器放大的皮秒光脉冲的上升和下降时间

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摘要

After adopting the theoretical model that includes several physical mechanisms such as the position- and time-dependent carrier lifetime, the gain saturation caused by the depletion of carrier density owing to the stimulated emission, the gain compression induced by the intraband process of carrier heating and spectral hole burning, the gain asymmetry and shift, both the rising and falling time of amplified picosecond optical pulses by the semiconductor optical amplifiers (SOAs) have been investigated numerically. The results show that with the increase of the bias current of SOAs or the length of SOAs, the rising time will decrease and the falling time increase; the input pulse with a large peak power will accelerate the rising time shortening and the falling time lengthening; the gain compression has an obvious influence on the rising and falling time for several picosecond width input pulses and gives approximately no effect for the input pulses in the tens of picosecond range; the gain asymmetry and shift affects the rising and falling time.
机译：在采用包含几种物理机制的理论模型后，例如与位置和时间有关的载流子寿命，由受激发射引起的载流子密度耗尽，载流子的带内过程引起的增益压缩以及对半导体光放大器（SOA）放大的皮秒光脉冲的频谱孔燃烧，增益不对称和偏移，上升和下降时间进行了数值研究。结果表明，随着SOA偏置电流的增加或SOA长度的增加，上升时间减少，下降时间增加。峰值功率大的输入脉冲将加速上升时间缩短，下降时间延长。增益压缩对几个皮秒宽度的输入脉冲的上升和下降时间有明显的影响，而对数十皮秒范围内的输入脉冲几乎没有影响;增益不对称和偏移会影响上升和下降时间。

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