Robust random number generation using steady-state emission of gain-switched laser diodes
Robust random number generation using steady-state emission of gain-switched laser diodes
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DOI：
10.1063/1.4886761
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发表时间：
2014-07
影响因子：
4
通讯作者：
Z. Yuan;Marco Lucamarini;J. Dynes;B. Frohlich;A. Plews;A. Shields
中科院分区：
文献类型：
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作者：
Z. Yuan;Marco Lucamarini;J. Dynes;B. Frohlich;A. Plews;A. Shields
我们展示了强大的，高速的随机数生成使用的干扰的稳态发射的保证随机相位，通过增益开关的半导体激光二极管。稳态发射容忍大的时间脉冲失调，因此显着提高了干涉质量。使用一个8位数字转换器，其次是一个有限的脉冲响应无偏置算法，我们实现了8和20 Gb/s的随机数生成速率，激光重复率为1和2.5 GHz，分别与±20%的公差在干涉仪差分延迟。我们还报告了80 Gb/s的产生速率使用部分相位相关的短脉冲。在量子密钥分配领域，我们的研究结果证实了增益开关激光二极管作为一个合适的光源，能够提供相位随机相干脉冲的时钟频率高达2.5 GHz。
We demonstrate robust, high-speed random number generation using interference of the steady-state emission of guaranteed random phases, obtained through gain-switching a semiconductor laser diode. Steady-state emission tolerates large temporal pulse misalignments and therefore significantly improves the interference quality. Using an 8-bit digitizer followed by a finite-impulse-response unbiasing algorithm, we achieve random number generation rates of 8 and 20 Gb/s, for laser repetition rates of 1 and 2.5 GHz, respectively, with a ±20% tolerance in the interferometer differential delay. We also report a generation rate of 80 Gb/s using partially phase-correlated short pulses. In relation to the field of quantum key distribution, our results confirm the gain-switched laser diode as a suitable light source, capable of providing phase-randomized coherent pulses at a clock rate of up to 2.5 GHz.