A Simple Random Number Generation Based on Quantum Noise in Laser Source

直博 水谷, Masatoshi Hasegawa, Hideaki Arai +6 more

Furukawa Genichi, Takahiro Saitou, Sakai Shota +7 more

Takahiro Saito, Hideaki Arai, Furukawa Genichi +4 more

Jianzhong Zhang, Mingjiang Zhang, Yi Liu +4 more

Abstract We experimentally demonstrate a 12.5 Gb s −1 random number generator based on measuring the spontaneous emission noise of a single-mode semiconductor laser. The spontaneous emission of light is quantum mechanical in nature and is an inborn physical entropy source of true randomness. By combining a high-speed analog-to-digital converter and off-line processing, random numbers are extracted from the spontaneous emission with the verified randomness. The generator is simple, robust, and with no need of accurately tuning the comparison threshold. The use of semiconductor lasers makes it particularly compatible with the delivery of random numbers in optical networks.

Shinya Maehara, Kohei Doi, Ushiki Teturo +3 more

T. Yamazaki, Atsushi Uchida

We investigate two optical sources used for random number generation: superluminescent diode (SLD) and semiconductor lasers. Amplified spontaneous emission noise is generated in the SLD and chaotic intensity fluctuation is generated in a semiconductor laser. We investigate the performance of random number generation for both optical sources. For single-bit generation of random numbers, the maximum generation rate is 8.33 Gb/s for both the SLD and the laser with a similar bandwidth of ~15 GHz. For multibit generation schemes, we obtain the generation rate up to 400 Gb/s for both the SLD and the laser. The overall characteristics are similar between the SLD and the laser, since similar bandwidths of the RF spectra are used. The probability density function of the SLD is more symmetric than that of the chaotic laser. This fact results in slightly good performance of random number generation using the SLD for multibit generation.