Observation of flat chaos generation using an optical feedback multi-mode laser with a band-pass filter: Optics Express
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In: Optics Express, Vol. 27, No. 13, 2019, p. 17859-17867.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Observation of flat chaos generation using an optical feedback multi-mode laser with a band-pass filter
T2 - Optics Express
AU - Li, Pu
AU - Cai, Qiang
AU - Zhang, Jianguo
AU - Xu, Bingjie
AU - Liu, Yiming
AU - Bogris, Adonis
AU - Shore, K. Alan
AU - Wang, Yuncai
PY - 2019
Y1 - 2019
N2 - We demonstrate experimentally that flat and broadband chaotic signals can be easily generated by combining a multi-mode laser diode subject to optical feedback with a band-pass filter. Measurements are made of the RF spectra of multi-mode and single-mode outputs from an external cavity Fabry-Perot (FP) semiconductor laser before and after the filtering procedure. In this way it is found that in the chaos regime the low-frequency energy of the single-mode output is enhanced by about 25 dB comparing with that of the multi-mode output. Moreover, the associated 3-dB chaos bandwidth can reach around 6 GHz for the single mode case. Numerical demonstrations show mode competition is the physical origin of the low-frequency enhancement in the single-mode chaotic outputs.
AB - We demonstrate experimentally that flat and broadband chaotic signals can be easily generated by combining a multi-mode laser diode subject to optical feedback with a band-pass filter. Measurements are made of the RF spectra of multi-mode and single-mode outputs from an external cavity Fabry-Perot (FP) semiconductor laser before and after the filtering procedure. In this way it is found that in the chaos regime the low-frequency energy of the single-mode output is enhanced by about 25 dB comparing with that of the multi-mode output. Moreover, the associated 3-dB chaos bandwidth can reach around 6 GHz for the single mode case. Numerical demonstrations show mode competition is the physical origin of the low-frequency enhancement in the single-mode chaotic outputs.
KW - Diode lasers
KW - Optical time domain reflectometry
KW - Random number generation
KW - Semiconductor lasers
KW - Single mode lasers
KW - Vertical cavity surface emitting lasers
U2 - 10.1364/OE.27.017859
DO - 10.1364/OE.27.017859
M3 - Article
VL - 27
SP - 17859
EP - 17867
JO - Optics Express
JF - Optics Express
IS - 13
ER -