The Peculiarities of Collinear Acousto-optic Filtration in the Presence of Optoelectronic Feedback

Abstract

The optoelectronic system combining collinear acousto-optic filter and positive electronic feedback is examined both experimentally and theoretically. The feedback signal is formed at the acousto-optic filter output using the part of optical beam intensity. The feedback introduction may increase the acousto-optic diffraction efficiency and narrow the system passband. It is shown that controlling the feedback electronic parameters it is possible to adjust the collinear filter transmission function shape.