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A multi-wavelength chaotic light source based on a semiconductor optical amplifier fiber ring laser
Author(s): Yuhui Wan; Zhi'e Zhang; Zhengying Li; Honghai Wang; Xuelei Fu
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Paper Abstract

In this paper, a dual-wavelength chaotic light source is proposed and demonstrated based on a fiber ring laser (FRL) with a semiconductor optical amplifier (SOA) as the intra-cavity gain element. By properly adjusting the bias current and the polarization, the SOA-FRL generates a high-dimension chaotic optical output with 24-nm optical bandwidth. The temporal instability of the output originates from the optical feedback, as well as the nonlinear effects of both the SOA and the long fiber. With optical-to-electrical conversion, the output electrical signal presents a bandwidth of 13 GHz, which is only limited by the bandwidth of the detection system. By inserting a tunable bandpass filter (TBPF) into the cavity, the chaotic emission bandwidth is limited to 3.2 nm. The output is then divided into two parallel channels using a wavelength division multiplexer (WDM). Autocorrelation of the two outputs confirms fair randomness, while the cross-correlation result verifies the independence of the two. With multi-bit sampling and over-sampling, dual-channel true random number generation (TRNG) up to 960 Gbps per channel is achieved. Random sampling periods are adopted to reduce the influence of the time-delay signature (TDS), which originates from the round-trip delay of the laser cavity and affects the randomness of the output. At a significance level of 0.01 and a random sampling ratio of 10-4 , the generated random bits can pass all the tests provided by the NITS SP800-22 test tool.

Paper Details

Date Published: 17 May 2019
PDF: 5 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111703G (17 May 2019); doi: 10.1117/12.2533914
Show Author Affiliations
Yuhui Wan, Wuhan Univ. of Technology (China)
Zhi'e Zhang, Wuhan Univ. of Technology (China)
Zhengying Li, Wuhan Univ. of Technology (China)
Honghai Wang, Wuhan Univ. of Technology (China)
Xuelei Fu, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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