We present a real-time and fully integrated quantum random number generator (QRNG) by measuring laser phase fluctuations. The QRNG scheme based on laser phase fluctuations is featured for its capability of generating ultra-high-speed random numbers. However, the speed bottleneck of a practical QRNG lies on the limited speed of randomness extraction. To close the gap between the fast randomness generation and the slow post-processing, we propose a pipeline extraction algorithm based on Toeplitz matrix hashing and implement it in a high-speed field-programmable gate array. Further, all the QRNG components are integrated into a module, including a compact and actively stabilized interferometer, high-speed data acquisition, and real-time data post-processing and transmission. The final generation rate of the QRNG module with real-time extraction can reach 3.2 Gbps.
Note: Fully integrated 3.2 Gbps quantum random number generator with real-time extraction
Xiao-Guang Zhang, You-Qi Nie, Hongyi Zhou, Hao Liang, Xiongfeng Ma, Jun Zhang, Jian-Wei Pan; Note: Fully integrated 3.2 Gbps quantum random number generator with real-time extraction. Rev. Sci. Instrum. 1 July 2016; 87 (7): 076102. https://doi.org/10.1063/1.4958663
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