摘要
Ultrafast physical random bit(PRB)generators and integrated schemes have proven to be valuable in a broad range of scientifc and technological applications.In this study,we experimentally demonstrated a PRB scheme with a chaotic microcomb using a chip-scale integrated resonator.A microcomb contained hundreds of chaotic channels,and each comb tooth functioned as an entropy source for the PRB.First,a 12 Gbits/s PRB signal was obtained for each tooth channel with proper post-processing and passed the NIST Special Publication 800-22 statistical tests.The chaotic microcomb covered a wavelength range from 1430 to 1675 nm with a free spectral range(FSR)of 100 GHz.Consequently,the combined random bit sequence could achieve an ultra-high rate of about 4 Tbits/s(12 Gbits/s×294=3.528 Tbits/s),with 294 teeth in the experimental microcomb.Additionally,denser microcombs were experimentally realized using an integrated resonator with 33.6 GHz FSR.A total of 805 chaotic comb teeth were observed and covered the wavelength range from 1430 to 1670 nm.In each tooth channel,12 Gbits/s random sequences was generated,which passed the NIST test.Consequently,the total rate of the PRB was approximately 10 Tbits/s(12 Gbits/s×805=9.66 Tbits/s).These results could ofer potential chip solutions of Pbits/s PRB with the features of low cost and a high degree of parallelism.
基金
the Innovation Research 2035 Pilot Plan of South-west University(SWUXDPY22012)
Chongqing Science Funds for Distinguished Young Scientists(cstc2021jcyjjqX0027)
the National Natural Science Foundation of China(Grant Nos.12272407,60907003,61805278,62275269,and 62275271)
National Key R&D Program of China(No.2022YFF0706005)
Innovation Support Program for Overseas Students in Chongqing(cx2021008)
China Postdoctoral Science Foundation(2018M633704)
Foundation of NUDT(JC13-02-13,ZK17-03-01)
Hunan Provincial Natural Science Foundation of China(13JJ3001)
the Program for New Century Excellent Talents in University(NCET-12-0142).
