Operation parameters of standing-wave diffraction modulators based on the piezoelectrically induced strain-optic effect

摘要

Optical response and electrical characteristics of standing-wave diffraction modulators working via diffraction of light on a piezoelectrically induced standing-wave strain-optic grating are calculated. The resonance distributions of the strain and frequency dependences of the elements of a lumped-element equivalent circuit are analytically derived for perpendicularly excited vibrations of plate piezoelectric resonators. The modulation indexdriving power relation determined by material parameters, modulator dimensions and operation conditions is derived. Numerical evaluation of the operation characteristics and parameters is performed for a representative LiNbO3 standing-wave diffraction modulator, which was applied successfully to modelock Nd-doped glass lasers.