Tailoring semiconductor laser cavity for ultrafast parallel random number generation

Kyungduk Kim; Stefan Bittner; Yongquan Zeng; Stefano Guazzotti; Ortwin Hess; Qi Jie Wang; Hui Cao

doi:10.1117/12.2606219

1 April 2022 Tailoring semiconductor laser cavity for ultrafast parallel random number generation

Kyungduk Kim, Stefan Bittner, Yongquan Zeng, Stefano Guazzotti, Ortwin Hess, Qi Jie Wang, Hui Cao

Proceedings Volume PC11987, Laser Resonators, Microresonators, and Beam Control XXIV; PC1198709 (2022) https://doi.org/10.1117/12.2606219
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

We design and fabricate a stable cavity for a highly multimode semiconductor laser. After suppressing the lasing instabilities, we utilize the spatio-temporal interference of numerous lasing modes to create ultrafast random intensity fluctuation in space and time. By spatial multiplexing of the laser emission, we produce 127 statistically independent parallel bit streams from a chip-scale laser. The total bit rate reaches 250 Terabit/s, two orders-of-magnitude faster than the state-of-the-art. The unpredictability and non-reproducibility of random bits are guaranteed by spontaneous emission noise originating from quantum fluctuations. Our scheme is robust, compact, and energy-efficient with applications in cybersecurity and stochastic modeling.

Conference Presentation

Citation Download Citation

Kyungduk Kim, Stefan Bittner, Yongquan Zeng, Stefano Guazzotti, Ortwin Hess, Qi Jie Wang, and Hui Cao "Tailoring semiconductor laser cavity for ultrafast parallel random number generation", Proc. SPIE PC11987, Laser Resonators, Microresonators, and Beam Control XXIV, PC1198709 (1 April 2022); https://doi.org/10.1117/12.2606219

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