40 Gb/s quantum random number generation based on optically sampled amplified spontaneous emission
Ya Guo,
Qiang Cai,
Pu Li,
Zhiwei Jia,
Bingjie Xu,
Qianwu Zhang,
Yamei Zhang,
Ruonan Zhang,
Zhensen Gao,
K. Alan Shore,
Yuncai Wang
Affiliations
Ya Guo
School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China
Qiang Cai
Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Pu Li
Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Zhiwei Jia
Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
Bingjie Xu
Science and Technology on Communication Security Laboratory, Institute of Southwestern Communication, Chengdu 610041, China
Qianwu Zhang
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China
Yamei Zhang
Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Ruonan Zhang
School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710072, China
Zhensen Gao
School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
K. Alan Shore
School of Electronic Engineering, Bangor University, Wales LL57 1UT, United Kingdom
Yuncai Wang
School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
We present a photonic approach for fast quantum random number generation based on optically sampled amplified spontaneous emission (ASE). This approach utilizes a terahertz optical asymmetric demultiplexer to sample the ASE and then digitize the sampled optical pulses into random bits using a multi-bit parallel comparator. A proof-of-concept experiment demonstrates that 40 Gb/s random bits with verified randomness can be obtained using our method. The current generation rate is mainly limited by the bandwidth of the available ASE source.
