Scientific Results

Influence of optical feedback strength and semiconductor laser coherence on chaos communications

Year: 2018

Authors: Al Bayati BM., Ahmad AK., Al-Naimee K.,

Autors Affiliation: [Al Bayati, Ban M.; Ahmad, Ahmad K.] Al Nahrain Univ, Dept Phys, Coll Sci, Baghdad, Iraq.
[Al Naimee, Kais A. M.] Univ Baghdad, Dept Phys, Coll Sci, Baghdad, Iraq and CNR, Ist Nazl Ott, Largo E Fermi 6, I-50125 Florence, Italy.

Abstract: The existence of high chaotic spiking in the dynamics of semiconductor lasers with an AC-coupled optical feedback is investigated experimentally. After chaos signal generation, the effect of attenuation feedback strength as a control parameter is studied, and the time evolution of photon density is analyzed. The chaotic instability is tested; our results exhibit monostability in dynamics. By applying different frequencies to observe the hidden regions, the chaotic dynamic results are indicated as a good candidate to hide information for satisfying the resonance phenomenon, to evaluate secure optical communication. (c) 2018 Optical Society of America


Volume: 35 (4)      Pages from: 918  to: 925

KeyWords: synchronization; suppression; modulation; spiking; diode
DOI: 10.1364/JOSAB.35.000918

Citations: 7
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