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Control of slave chaotic dynamics by master current modulation in a chaotic coupled laser system

I. R. ANDREI1,* , C. ONEA2, P. E. STERIAN2, I. IONITA3, M. L. PASCU1,3

Affiliation

  1. National Institute for Lasers, Plasma, and Radiation Physics, P.O. Box MG-36, 077125 Magurele, Bucharest, Romania
  2. University "Politehnica" of Bucharest, Academic Center for Optical Engineering and Photonics, Faculty of Applied Sciences, Physics Department, 060042 Bucharest, Romania
  3. Faculty of Physics, University of Bucharest, 077125 Magurele, Bucharest, Romania

Abstract

Two semiconductor lasers operated under external optical feedback conditions in low-frequency fluctuations (LFF) chaotic regime were optically coupled into a master - slave synchronization scheme. The modulation of master injection current induces in the emission of two coupled systems power dropouts at two dominant frequencies. The dropouts rates were studied using the statistical analysis and were correlated with the modulation frequency and the frequencies of natural LFF oscillations of master and slave emissions. Modulation at a frequency included in the range bounded by master and slave natural LFF frequencies has, as effect, the clustering of slave dropouts on two frequencies: the driven and the master natural LFF ones. If modulation frequency is out of this range, it has only the role to group dropouts periods on two frequencies, different from the modulation one. This behavior is consistent with the phase correlation between master laser and external modulator at the used driven frequencies..

Keywords

Chaotic semiconductor laser, Optical feedback, Low-frequency fluctuations, Chaotic synchronization, Current modulation.

Citation

I. R. ANDREI, C. ONEA, P. E. STERIAN, I. IONITA, M. L. PASCU, Control of slave chaotic dynamics by master current modulation in a chaotic coupled laser system, Optoelectronics and Advanced Materials - Rapid Communications, 13, 5-6, May-June 2019, pp.284-289 (2019).

Submitted at: Oct. 17, 2018

Accepted at: June 14, 2019