期刊
OPTICS LETTERS
卷 44, 期 4, 页码 975-978出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.44.000975
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- Ministere de l'Enseignement superieur de la Recherche et de I'Innovation
- Region Grand-Est
- Departement Moselle
- European Regional Development Fund (ERDF)
- Metz Metropole
- Airbus GDI Simulation
- CentraleSupelec
- Fondation CentraleSupelec
We analyze experimentally and theoretically the chaotic dynamics generated by a laser diode subjected to phase-conjugate feedback. Phase conjugation is obtained from four-wave mixing in a BaTiO3 photorefractive crystal. We demonstrate that the chaos bandwidth first increases linearly with feedback ratio but then saturates to relatively high values. With a single optical feedback, a chaos bandwidth up to about 18 GHz is achieved, which is about five times as large as the free-running laser diode relaxation oscillation frequency. Numerical simulations confirm our experimental observations and unveil that the finite depth penetration into the crystal is responsible for the observed saturation. (C) 2019 Optical Society of America
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