Dynamic characteristics of 20‐layer stacked QD‐SOA with strain compensation technique by ultrafast signals using optical frequency comb
Dynamic characteristics of 20‐layer stacked QD‐SOA with strain compensation technique by ultrafast signals using optical frequency comb
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使用光学频率梳通过超快信号进行应变补偿技术的 20 层堆叠 QD-SOA 的动态特性
DOI：
10.1002/pssa.201600557
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
N. Yamamoto
中科院分区：
文献类型：
--
作者：
A. Matsumoto;K. Akahane;T. Sakamoto;T. Umezawa;A. Kanno;N. Yamamoto
本文采用应变补偿技术，利用光频梳的超快信号，对生长在InP（311）B衬底上的20层堆叠量子点半导体光放大器（QD-SOA）的静态和动态特性进行了研究。所制备的QD-SOA的增益峰值波长为1520 nm，当注入电流为350 mA时，获得了约15.8 dB的最大增益。通过使用光比特率乘法器模块，复用由使用光频率梳产生的光脉冲。我们观察了量子点半导体光放大器在脉冲串作用下的动力学行为。脉冲之间的最小间隔为4.2 ps，我们使用光学采样示波器进行测量。结果发现，QD-SOA可以响应超快脉冲，相当于220 Gb s-1级速度的信号，而没有任何大的图案失真。此外，我们还可以得到比较清晰的光脉冲波形。我们还通过使用类似泵浦探针的方法估计了QD-SOA的增益恢复时间为6.0 ps。制造的QD-SOA能够响应超快信号的原因之一是其超短的增益恢复时间。
In this article, we evaluated the static and dynamic characteristics of 20‐layer stacked quantum dot semiconductor optical amplifiers (QD‐SOAs) grown on an InP(311)B substrate with a strain compensation technique by ultrafast signals using an optical frequency comb. The gain peak wavelength of the fabricated QD‐SOA was 1520 nm, and a maximum gain of approximately 15.8 dB was obtained when the injection current was 350 mA. By using optical bit rate multiplier modules, an optical pulse, which was generated by the use of the optical frequency comb, was multiplexed. We observed the dynamic behavior of the QD‐SOA with the pulse trains. The minimum interval between pulses was 4.2 ps, and we measured using an optical sampling oscilloscope. It was found the QD‐SOA could respond to ultrafast pulses that were equivalent to the signals of 220 Gb s−1 class speed without any large pattern distortions. In addition, we could obtain a rather clear optical pulse waveform. We also estimated the gain recovery time of the QD‐SOA to be 6.0 ps by using a pump probe‐like method. One of the reasons that the fabricated QD‐SOA could respond to ultrafast signals was its ultrashort gain recovery time.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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DOI：
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发表时间：
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影响因子：
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