Impact Statement:We study in this paper a new feedback configuration via stimulated Brillouin scattering. Such feedback has never been studied. In the fundamental point of view, our new s...Show More
Abstract:
In this work, we propose a new scheme of optical feedback using stimulated Brillouin scattering (SBS). A high-power laser diode emitting at 1450 nm stimulates Brillouin b...Show MoreMetadata
Impact Statement:
We study in this paper a new feedback configuration via stimulated Brillouin scattering. Such feedback has never been studied. In the fundamental point of view, our new scheme exploits random feedback from stimulated Brillouin scattering which is considered as a random process. The random feedback is new and has never been reported and allows also generating complex dynamical behaviours. This is the first study showing complex dynamical behaviours in a laser diode subject to random feedback via SBS. The studies on laser diodes subject to conventional optical feedback have been done with the presence of time-delay signature for decades. This is the important drawback in some engineering applications such as random number generation and secure chaotic communications. In the engineering application point of view, our new random feedback scheme allows vanishing the time-delay signature. We strongly suggest that this is promising results in the engineering applications mentioned above.
Abstract:
In this work, we propose a new scheme of optical feedback using stimulated Brillouin scattering (SBS). A high-power laser diode emitting at 1450 nm stimulates Brillouin back-scattering in a 4km-long optical fibre and the back-scattered light is injected back into the laser diode for optical feedback. The experimental results with RF spectrum exhibit clearly the Brillouin frequency shift at 11.46 GHz. Although the frequency shift is very large, the laser diode subject to optical feedback using SBS shows abundant dynamics. RF spectrum maps are also established with respect to the laser drive current. The results are compared with the ones for conventional optical feedback and it is clearly shown that the dynamical behaviours for both the configurations are very different. The investigation with autocorrelation functions reveals that the time-delay signature vanishes completely using the SBS feedback scheme unlike the conventional feedback one.
Published in: IEEE Journal of Quantum Electronics ( Volume: 56, Issue: 1, February 2020)
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