Author Affiliations
1Taiyuan University of Technology, Key Laboratory of Advanced Transducers and Intelligent Control Systems, Ministry of Education, Taiyuan, China2Guangdong University of Technology, School of Information Engineering, Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangzhou, China3Northwestern Polytechnical University, School of Electronics and Information, Xi’an, China4Institute of Southwestern Communication, Science and Technology on Communication Laboratory, Chengdu, China5Bangor University, School of Electronic Engineering, Wales, United Kingdomshow less
Fig. 1. Schematic of the proposed RBG with all-optical quantization: (a) optical chaos, (b) optical sampler, and (c) optical quantizer. DFB, distributed feedback semiconductor laser; PC, polarization controller; VA, variable optical attenuator; FM, fiber mirror; ISO, optical isolator; 3 dB, 3 dB FC; BPD, balanced photodiode; MLL, mode-locked laser; EOM, electro-optic modulator; EDFA, erbium-doped fiber amplifier; HNLF, highly nonlinear fiber; BPF, optical BPF.
Fig. 2. (a) RF spectra of the white chaos and (the inset is the optical spectra of ); (b) ACF of the white chaos (the inset on right upper corner shows ACFs of the ); (c) temporal waveforms of the white chaos; (d) amplitude probability distribution of the white chaos.
Fig. 3. Schematic optical sampling results. (a) Continuous-time white chaotic waveform to be sampled; (b) discrete-time chaotic pulses after the optical sampler; (c) normalized CCF of the signal before and after the optical sampler.
Fig. 4. (a) Measured optical spectra from three SC pulses with different powers (45, 50, and 55 mW); (b) measured pulse waveform before (red) and after (blue) the threshold/quantization operation.
Fig. 5. (a) Bias versus the sample size of the generated 10 Gb/s random bits stream. The black dotted line in (a) is its three-standard-deviation line, where . (b) AC coefficient as a function of the delay bit for 16 Mbits.
Fig. 6. NIST test results: -value (left column) and proportion (right column). Note, the 15 test items are shown along the horizontal axis.
Fig. 7. Frequency of “1” in a random bit sequence (red squares) and the number of passed NIST tests (blue circles) as a function of the filtering center wavelength .