Chaos is a class of complex behavior that can emerge from nonlinear dynamical systems, and it exists in both the natural and the technological world. Many biological systems such as the human heart and invertebrate neurons naturally exhibit chaotic behavior. Furthermore, digital computing has made feasible the creation of fractal patterns based on chaos. The beauty of chaos, however, lies not in the aesthetic of fractals, but in the simplicity of the system from which such complex, unpredictable behavior can emerge. The chaotic behavior of a non‐linear R‐L‐Diode circuit has been studied. The non‐linear behavior of the diode was modeled to compare the measured curves with the predicted ones. Period unfolding was observed by feeding the R‐L‐Diode circuit with a sinusoidal signal, varying the frequency and holding constant the amplitude of the input signal. The output voltage was measured on the resistor and bifurcation phenomenon was observed for 2, 4 and 8 periods and for a wide range of frequencies, before reaching the chaotic behavior. The voltage drop on the resistor was used as a source, and coupled to a diode laser excitation circuit. This signal has been coupled to the laser circuit using operational amplifiers to secure the extinction of noises, to provide the adequate signal level and to couple the circuit impedances. The laser response was studied as a function of output signal of the R‐L‐Diode circuit, especially where it becomes chaotic.