Distortion of an Optical Signal by a Recording Optoelectronic Device

The results of modeling and comparison with experiment of distortions of signals registered by an optoelectronic device (OED) are presented in the work. Simulation is implemented in the Spyder environment in Python for various parameters (R, C) of the equivalent circuit of the OED. It is shown that the value of RC-circuit significantly affects the distortion of the output electrical signal with respect to the input optical signal. A criterion for RC-circuit parameters is established, under which the relative distortion of the signal does not exceed 2.5 percent. The simulation results are compared with the experimentally recorded signal when the optical pulse of the trapezoidal form is exposed to OED. It is shown that the use of an optical signal of a trapezoidal shape makes it possible to experimentally determine RC-circuit for real OED. The known value of the RC-circuit of real OED allows not only to evaluate the applicability of OED to control the shape of the optical signal, but also to reconstruct this form from the registered signal.