A method of determining a frequency response of an electrical component and device for carrying out the method

A method for determining the frequency response of an electrical component (90), in which - a laser (30) a periodic optical signal (I1) having a predetermined repetition frequency (f - the electrical component (90) with an electrical excitation signal (E2) is driven with a predetermined excitation frequency (f - the optical signal (I1) being a modulated optical signal (I2) is formed is irradiated by or in a material (40) whose optical properties by the electric or magnetic alternating field (Emod) are modulated, - the modulated optical signal (I2) to form phase-related measurement values ​​(I3) is measured, - the phase position (ΔΦ) between the optical signal (I1) and the start signal (E2) - is varied ... - at least once