光注入直接相位调制的理论研究
Direct phase modulation via optical injection: theoretical study
摘要：
光注入直接相位调制是一种新的增益开关激光器相位编码方法，它满足了量子密钥分发对发射机的高要求：紧凑、低损耗、与CMOS工艺兼容，以及没有导致边信道信息泄漏的不良效应。尽管该系统的成功实施和良好的发展前景，在文献中仍然缺乏对该方案的理论研究。在这里，我们第一次进行了理论分析。我们研究了自发发射噪声的影响，研究了增益非线性的作用，并考虑了温度漂移的影响。结果表明，这些现象显着影响系统的性能。我们试图在这里制定实用的说明，这将有助于考虑这些功能时，制定和采用基于光注入的相位调制器。
英文摘要：
Direct phase modulation via optical injection is a newly developed method for coding the phase of a gain-switched laser, which meets high requirements placed on transmitters for quantum key distribution: compactness, low losses, compatibility with CMOS technologies, and the absence of undesirable effects leading to the side-channel information leakage. Despite the successful implementation and good prospects for the further development of this system, there is still a lack of theoretical investigations of this scheme in the literature. Here, for the first time, we perform its theoretical analysis. We study the influence of the spontaneous emission noise, examine the role of the gain non-linearity and consider the effect of the temperature drift. The results obtained reveal that these phenomena significantly affect the system performance. We have tried to formulate here practical instructions, which will help to take these features into account when elaborating and employing the optical-injection-based phase modulator.
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