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Ultrafast all-optical digital comparator using quantum-dot semiconductor optical amplifiers

机译：使用量子点半导体光放大器的超快全光数字比较器

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摘要

In this investigation, three types of 160 Gb/s all-optical digital comparators using quantum-dot semiconductor optical amplifiers (QD-SOAs) are constructed. These configurations have different combination patterns of logic gates and QD-SOAs. Based on numerical simulations, we investigate and evaluate the performance of the devices in terms of the number of logic gates and QD-SOAs, and the value of the extinction ratio (ER). In addition, we demonstrate the effect of amplified spontaneous emission (ASE) noise on the ER and Q-factor. The results show that two of the three configurations are superior to the other configuration in terms of circuit complexity, value of ER, and sensitivity to injection current. Moreover, these two configurations achieve ER values over 10 dB and Q-factor over 9, even when intense ASE noise is considered. The proposed configurations have several advantages such as high quality, easy configuration, insensitivity to injection current, and strong noise robustness, which are favorable for practical applications. This investigation also facilitates the specification of the pros and cons of each configuration, and the determination of the appropriate comparator according to the desired requirements.
机译：在这项研究中，构建了三种使用量子点半导体光放大器（QD-SOA）的160 Gb / s全光数字比较器。这些配置具有逻辑门和QD-SOA的不同组合模式。基于数值模拟，我们根据逻辑门和QD-SOA的数量以及消光比（ER）的值来研究和评估器件的性能。此外，我们证明了放大的自发发射（ASE）噪声对ER和Q因子的影响。结果表明，在电路复杂性，ER值和对注入电流的敏感性方面，三种配置中的两种优于其他配置。而且，即使考虑到强烈的ASE噪声，这两种配置也可以实现超过10 dB的ER值和超过9的Q因子。所提出的配置具有多个优点，例如高质量，易于配置，对注入电流不敏感以及强大的噪声鲁棒性，这对于实际应用是有利的。这项研究还有助于规范每种配置的优缺点，并根据所需要求确定合适的比较器。

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