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

Author

Yanhua Hong ; Xianfeng Chen ; Spencer, Paul S. ; Shore, Keith Alan

Author_Institution

Sch. of Electron. Eng., Bangor Univ., Bangor, UK

Volume

51

Issue

3

fYear

2015

fDate

Mar-15

Firstpage

1

Lastpage

6

Abstract

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.

Keywords

diffraction gratings; laser cavity resonators; optical chaos; optical fibres; semiconductor optical amplifiers; surface emitting lasers; SOA; bias current; chaos spectra; fiber grating frequency; fiber ring resonator; flat broadband optical chaos bandwidth; free-running VCSEL frequency; frequency detuning; power fluctuation; semiconductor optical amplifier; vertical-cavity surface-emitting laser; Bandwidth; Chaos; Optical fiber amplifiers; Optical ring resonators; Resonant frequency; Semiconductor optical amplifiers; Vertical cavity surface emitting lasers; Chaos; Vertical-cavity surface-emitting lasers; optical feedback; vertical-cavity surface-emitting lasers;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/JQE.2015.2388792

Filename

7001552