利用增益开关激光二极管稳态发射产生鲁棒随机数
Robust random number generation using steady-state emission of gain-switched laser diodes
摘要：
我们证明了强大的，高速的随机数生成使用的保证随机相位的稳态发射的干扰，获得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位的数字化器，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，激光重复率分别为1和2.5 GHz，在干涉仪差分延迟+/-20%的公差。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。在量子密钥分发领域，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，能够提供相位随机化的相干脉冲的时钟频率高达2.5 GHz。
英文摘要：
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.
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