Summary
2011 International Symposium on Nonlinear Theory and Its Applications
2011
Session Number:B1L-B
Session:
Number:B1L-B3
Experiment on fast physical random bit generation with bandwidth-enhanced chaotic semiconductor lasers
Taiki Yamazaki, Yasuhiro Akizawa, Shinichiro Morikatsu, Hiroki Aida, Atsushi Uchida, Takahisa Harayama, Satoshi Sunada, Ken-ichi Arai, Kazuyuki Yoshimura, Peter Davis,
pp.334-337
Publication Date:2011/9/4
Online ISSN:2188-5079
Summary:
We experimentally demonstrate random bit generation using multi-bit samples of bandwidth-enhanced chaos in semiconductor lasers. Chaotic fluctuation of laser output is generated in a semiconductor laser with optical feedback and the chaotic output is injected into a second semiconductor laser to obtain a chaotic intensity signal with bandwidth enhanced up to 16 GHz. The chaotic signal is converted to an 8-bit digital signal by sampling with a digital oscilloscope at 12.5 Giga samples per second (GS/s). Random bits are generated by bitwise exclusive- OR operation on corresponding bits in samples of the chaotic signal and its time-delayed signal. Statistical tests verify the randomness of bit sequences obtained using 1 to 6 bits per sample, corresponding to fast random bit generation rates from 12.5 to 75 Gigabit per second (Gb/s) (= 6 bit × 12.5 GS/s).