Using a super-luminescent emitting diode (SLED) source with a linewidth of more than 60 nm, we realize truly random number generation up to 100 Gb s−1 by directly measuring the intensity noise, which originates from the fluctuations of spontaneous emissions. Furthermore, we propose a post-processing method in an over-sampling scheme by eliminating the correlation between adjacent samples, and achieve an ultra-high truly random number generation rate of 1.6 Tb s−1. The randomness of the generated bit stream is verified using standard statistical test suites (Diehard and NIST-STS), and evaluated using a three-standard-deviation criterion and Shannon entropy estimation.
We propose an implementation of random number generation based on the measurement of polarization mode noise in vertical-cavity surface-emitting lasers (VCSEL). By measuring the phase difference between two laser beams with perpendicular polarization directions, a 40 Gbps generation speed is achieved with a simple post-processing method. The random sequence we generated passes both the standard statistical test suites (Diehard and NIST-STS) and 3σ criterion. Our setup is compact and easy for implementation, and it also has a better efficiency in extracting randomness from VCSEL compared with existing methods.
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