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Articles by E. A. Viktorov
Extreme events in frequency-swept semiconductor lasers
We analyze a delay differential equation model for a frequency-swept semiconductor laser and demonstrate existence of extreme events in its dynamics, with probabilities heavily dependent on the sweep rate. The extreme events appear even in absence of any noise in the system and do not exhibit significant dependence on its presence. We investigate the problem numerically and show that intensity dynamics of these events are highly localized in the filter detuning space.
Refractory times for excitable dual-state quantum dot laser neurons
Abstract Excitable photonic systems show promise for ultrafast analog computation, several orders of magnitude faster than biological neurons. Optically injected quantum dot lasers display several excitable mechanisms with dual-state quantum lasers recently emerging as true all-or-none excitable artificial neurons. For use in applications, deterministic triggering is necessary and this has previously been demonstrated in the literature.
Subharmonic locking and frequency combs in frequency-swept semiconductor lasers
Abstract We analyze a delay differential equation model for a swept semiconductor laser and demonstrate existence of various periodic solutions that are subharmonically locked to the sweep rate. These solutions provide optical frequency combs in spectral domain.
Inhibitory and excitatory integration with a quantum dot laser neuron
Abstract Neuromorphic computing has garnered a lot of attention in recent years. Excitable photonic systems in particular demonstrate great potential for ultrafast, controllable spike processing. Optically injected quantum dot lasers display several distinct excitable regimes.
Optical square-wave generation in a semiconductor laser with optoelectronic feedback
Abstract We report self-sustained optical square-wave (SW) generation in a semiconductor laser diode subjected to delayed optoelectronic feedback on its injection current ($J$). This optoelectronic oscillator relies on nonlinear effects present in both the laser diode and in the optoelectronic feedback loop through amplifier saturation. The repetition rate of the SW is an integer multiple of the inverse of the loop delay, while the duty cycle can be tuned with $J$.
Asymmetric excitable phase triggering in an optically injected semiconductor laser
Abstract One of the defining characteristics of excitability is the existence of an excitable threshold: the minimum perturbation amplitude necessary to produce an excitable response. We analyze an optically injected dual state quantum dot laser, previously shown to display a dual state stochastic excitable dynamic. We show that deterministic triggering of this dynamic can be achieved via optical phase perturbations.
Asymmetrical performance of a laser-based reservoir computer with optoelectronic feedback
Abstract We numerically quantify the performance of a photonic reservoir computer based on a semiconductor laser subject to high-pass filtered optoelectronic feedback. We assess its memory capacity, computational ability, and performance in solving a multi-step prediction task.
Coherence transfer in an akinetic swept source OCT laser with optical feedback
S. Slepneva, A. Kovalev, N. Rebrova, K. Grigorenko, E. Viktorov, and G. Huyet Author Affiliations S. Slepneva,1,2,3,†,* A. Kovalev,4,† N. Rebrova,2,3 K. Grigorenko,4 E. Viktorov,4 and G.
Nanometric sensing with laser feedback interferometry
Abstract We demonstrate a nanometric sensor based on feedback interferometry in a distributed feedback (DFB) laser by using a measurement of either the optical frequency or laser voltage. We find that in an optimal range of optical feedback, the sensor operates reliably down to an extrapolated 12 nm; for the sensor demonstrated here at ∼1550nm, this provides a minimum detectible displacement of λ/130.
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