KEYWORDS: Quantum random number generation, Analog to digital converters, Quantum beats, Quantum numbers, Bandpass filters, Tunable filters, Signal detection, Optical filters, Clocks, Background noise
We report two Quantum Random Number Generator (QRNG) schemes based on Amplified Spontaneous Emission (ASE) to address the problems of previous ASE based QRNGs – (1) costlier and commercially difficult-to-get components, (2) higher electrical noise in the faster detectors. Our ASE-ASE-beating based QRNG, built using commercially available components, clocks in 7.437Gbps random number generation rate. Our second QRNG scheme based on the beating of LASER and ASE of similar power generates random bits at a speed of 7.80Gbps. The minimum entropy values for these schemes are 5.21 and 5.4990 respectively for an 8-bit ADC. The second scheme reports higher entropy because its random numbers has a higher variance than first one. We use the Toeplitz extractor on the raw bits to generate unbiased random numbers and verify them with the help of industry-standard statistical tests.
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