We present a high-speed random number generation scheme based on measuring the quantum phase noise of a single-mode laser operating at a low intensity level near the lasing threshold. A delayed self-heterodyning system has been developed to measure the random phase fluctuation. By actively stabilizing the phase of the interferometer, a random number generation rate of 500 Mbit/s has been demonstrated and the generated random numbers have passed all the DIEHARD tests.
© 2010 Optical Society of America
Original Manuscript: October 22, 2009
Manuscript Accepted: December 7, 2009
Published: January 25, 2010
Bing Qi, Yue-Meng Chi, Hoi-Kwong Lo, and Li Qian, "High-speed quantum random number generation by measuring phase noise of a single-mode laser," Opt. Lett. 35, 312-314 (2010)