Enhanced Flat Broadband Optical Chaos Using Low-Cost VCSEL and Fiber Ring Resonator

被引：37

作者：

Hong, Yanhua ^{[1
]}

Chen, Xianfeng ^{[1
]}

Spencer, Paul S. ^{[1
]}

Shore, Keith Alan ^{[1
]}

机构：

[1] Bangor Univ, Sch Elect Engn, Bangor LL57 1UT, Gwynedd, Wales

来源：

IEEE JOURNAL OF QUANTUM ELECTRONICS | 2015年 / 51卷 / 03期

关键词：

Chaos; optical feedback; vertical-cavity surface-emitting lasers; RANDOM BIT GENERATION; SEMICONDUCTOR-LASERS; SYNCHRONIZATION;

D O I：

10.1109/JQE.2015.2388792

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Low-cost vertical-cavity surface-emitting laser (VCSEL) and semiconductor optical amplifier (SOA) have been explored experimentally in a setup with a fiber ring resonator to generate flat broadband chaos. The effect of the frequency detuning between the fiber grating frequency and the free-running VCSEL's frequency, and the bias current of the SOA on the bandwidth of chaos has been studied. The results show that the bandwidth of the chaos is strongly dependent on the frequency detuning and the bias current of the SOA. Using the conventional definition of chaos bandwidth, the bandwidth of chaos with the fiber ring resonator can be about three times greater than that with a conventional mirror. In order to consider the flatness of the chaos spectra, the flat bandwidth of chaos is redefined as the frequency range between dc and the frequency where the power fluctuation is within +/- 3 dB. With this definition, the flat bandwidth of chaos with the fiber ring resonator is > 10 times higher than that with conventional mirror feedback.

引用

页数：6

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