Simulation of laser autodyne signals with fast-moving reflector

The simulation of the signals of laser autodyne sensors is performed in conditions of rapid movement of the reflector, when it is necessary to take into account an arbitrary ratio of the period of the autodyne signal and the delay time of the reflected radiation. The initial equations describing the formation of single-mode laser diode signals under the specified conditions are given. The solution of the initial equations is obtained by decomposing into a series of delayed action functions. Calculations of signal characteristics at various normalized ranges to the location object and levels of reflected radiation characterized by a generalized feedback parameter are performed. New results in the theory of laser self-mixer sensors have been obtained, from which it follows that with an increase in the speed of the location object, when the delay time of reflected radiation becomes commensurate or more than the period of the autodyne signal, the level of its anharmonic distortion decreases significantly. It is noted that the obtained results must be taken into account when processing signals in equipment using the autodyne principle of constructing laser transceivers.