Physical random bit generation from chaotic solitary laser diode

Abstract

We demonstrate the physical generation of random bits at high bit rates (> 100 Gb/s) using optical chaos from a solitary laser diode and therefore without the complex addition of either external optical feedback or injection. This striking result is obtained despite the low dimension and relatively small bandwidth of the laser chaos, i.e. two characteristics that have been so far considered as limiting the performances of optical chaos-based applications. We unambiguously attribute the successful randomness at high speed to the physics of the laser chaotic polarization dynamics and the resulting growth rate of the dynamical entropy.

Chaos in Magnetic Nanocontact Vortex Oscillators

“…In the context of physical systems such as microelectronic or photonic devices, chaotic behavior has been studied for different possible applications in information technologies [1,2], where the underlying premise is that the complexity of a chaotic signal can be harnessed to compute or process information. For example, the high information entropy content of a chaotic signal can be used for random number generation at GHz rates and beyond [3][4][5][6], its symbolic dynamics can be used to encode information [7][8][9][10], and the possibly large fractal dimension combined with synchronization capabilities makes it an ideal source for secure communications at the physical level [11,12].…”

Asymmetric dwell-time statistics of polarization chaos from free-running VCSEL

“…We use a Tektronix oscilloscope (CSA7404, 4 GHz bandwidth, 20 GSamples/s) combined with its built-in photodiode (2.4 Ghz bandwidth). The limited bandwidth of the photodetector allows us to filter out the fast oscillations on each scroll of the attractor and, thus, to analyze mostly the events corresponding to the jumps between the two scrolls as detailed in [14]. The average dwell-time is evaluated over 10 4 recorded events.…”

Ultrafast Fully Photonic Random Bit Generator

“…Since then, chaotic LDs have been regarded as a highly promising source of randomness for ultrafast physical RBGs with much significant work having been reported over the past ten years or so [6][7][8][9][10][11][12][13][14][15][16][17][18] R from the first-order derivative between a digitized chaotic signal from a single optical feedback LD by a virtual 8-bit ADC and its time-shifted version [7]. Further, Kanter et al enhanced this rate into 300 Gb/s using high-order derivatives of the digitized chaotic signal [8].…”