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We present a real-time and fully integrated quantum random number generator(QRNG) by measuring laser phase fluctuations. The QRNG scheme based on laserphase fluctuations is featured for its capability of generating ultrahigh-speed random numbers. However, the speed bottleneck of a practical QRNGlies on the limited speed of randomness extraction. To close the gap betweenthe fast randomness generation and the slow post-processing, we propose apipeline extraction algorithm based on Toeplitz matrix hashing and implement itin a high-speed field-programmable gate array. Further, all the QRNG componentsare integrated into a module, including a compact and actively stabilizedinterferometer, high-speed data acquisition, and real-time data post-processingand transmission. The final generation rate of the QRNG module with real-timeextraction can reach 3.2 Gbps.

Fully integrated 3.2 Gbps quantum random number generator with real-time extraction