利用超辐射发光二极管的放大自发辐射噪声作为量子随机熵源, 设计并实现了一种高速小型化光量子随机数发生器(QRNG)。为减小经典噪声及不完美器件对随机性带来的影响, 基于对量子熵源的最小熵估计, 在现场可编程门阵列中, 对每次采集序列的相邻比特位进行异或操作, 并截取低12位作为最终随机序列。该QRNG的随机数的实时产生速率达1.4 Gb/s, 可实时传输至上位机用户端, 且能长时间稳定工作, 具备实用化潜力。

An ultra-fast compact optical quantum random number generator (QRNG) is designed and realized by using the amplified spontaneous emission (ASE) noise of superluminescent light-emitting diodes as the quantum random entropy source. In order to reduce the influences of the classical noise and imperfect devices on the randomness and based on the minimum entropy estimation for the quantum entropy source, the exclusive OR (XOR) operation of the adjacent bits for the each collected sequence is conducted and the 12-least-significant bit is intercepted as the final random sequence in the high speed field programmable gate array in real-time. The proposed QRNG with a real-time random number generation rate of 1.4 Gb/s can directly deliver to a host computer and work stably for a long time, which possesses the practical application potential.