Fast physical random bit generation with photonic integrated circuits with different external cavity lengths for chaos generation

• DOI: 10.1364/oe.22.011727
• Publication Date: 2014-05-07T16:14:32Z
• Authors: Rie Takahashi; Yasuhiro Akizawa; Atsushi Uchida; Takahisa Harayama; Ken Tsuzuki; Satoshi Sunada; Kenichi Arai; Kazuyuki Yoshimura; Peter Davis
• Keywords: 0103 physical sciences; 01 natural sciences

We generate random bit sequences from chaotic temporal waveforms by using photonic integrated circuits (PICs) with different external cavity lengths. We investigate the condition for generating random bits at different sampling rates of single-bit generation method with the PICs. We succeed in generating certified random bit sequences by using the PIC with 3, 4, 5, or 10-mm-long external cavity, whereas random bits cannot pass all the statistical tests of randomness when the PIC with 1 or 2 mm-long external cavity is used.