Experimental and Numerical Study of an Optoelectronics Flexible Logic Gate Using a Chaotic Doped Fiber Laser

Abstract

In this chapter, we present the experimental and numerical study of an optoelectronics flexible logic gate using a chaotic erbium-doped fiber laser. The implementation consists of three elements: a chaotic erbium-doped fiber laser, a threshold controller, and the logic gate output. The output signal of the fiber laser is sent to the logic gate input as the threshold controller. Then, the threshold controller output signal is sent to the input of the logic gate and fed back to the fiber laser to control its dynamics. The logic gate output consists of a difference amplifier, which compares the signals sent by the threshold controller and the fiber laser, resulting in the logic output, which depends on an accessible parameter of the threshold controller. The dynamic logic gate using the fiber laser exhibits high ability in changing the logic gate type by modifying the threshold control parameter.

Introductory Chapter: Optical Fibers

“…Among the amplifiers doped with rare earths, those made with fiber-optic doped with erbium and doped with ytterbium can be mentioned [10][11][12]. The optical fibers doped with erbium are the most used for the construction of this type of amplifiers, among other sensors and other applications [13][14][15][16]. The above due to its low cost compared to the ytterbium and because its amplification window coincides with the third transmission window of silica-based optical fibers [17].…”

“…In addition, systems with nonlinear behavior have been found. Among the results observed with the said nonlinear behavior in fiber doped with erbium (Er 3+ ), there are behaviors with multistability, phenomenological dynamics, different sensors, and masking in communications, among others [14,16,23,[33][34][35].…”

Implementation of Logic Gates in an Erbium-Doped Fiber Laser (EDFL): Numerical and Experimental Analysis

“…This allows for a dynamic discretization that takes into account the response of the system to a bias and the change in behavior due to the position of the attractor [19][20][21]. Considering the possible application of a chaotic system that can function as a logic gate based on a telecommunication system, and the few works that deal with this topic from the optical systems point of view [22,23], the present work deals with the generation of AND and NOR logic gates using an Erbium-Doped Fiber Laser as a dynamic system. By perturbing the system with a bias signal, it is possible to change the operating regime of the laser, obtaining a completely different logic state that is stable in time.…”