Method and device for generating a drive signal for an acousto-optic component for carrier envelope phase stabilization

摘要

The invention relates to a method and a device (100) for generating a drive signal (72) for an acousto-optic component (70), with which a carrier envelope phase of the laser pulses of a laser signal (12) is stabilized, and a system and a method for stabilizing a train of temporally equidistant short laser pulses with respect to the carrier envelope phase. The system comprises a decoupling device (30) for generating the repetition signal whose frequency is the repetition rate of the short laser pulses of the laser signal to be stabilized or an integer harmonic of the repetition rate of the short laser pulses to be stabilized of the laser signal, another decoupling device (40) around the carrier envelope To generate offset frequency signal whose frequency or whose at least one frequency component is coherent to the carrier envelope offset frequency, a device (100) for generating a driver signal (72) having a bandwidth limited frequency comb spectrum whose frequency components to the carrier Envelope is offset-frequency coherent, the device being supplied with the repetition signal and the carrier envelope offset frequency signal, and an acousto-optic element, to which the laser signal is fed and which is operated with the driver signal, so that the carrier envelope phase of the short La Serpulse is compensated by the acousto-optical interaction, wherein in one aspect, an optical delay device (60) in front of the acousto-optic device (70) is arranged, which is such that the laser pulses are delayed so that at least the group delay of the acoustic Signal is compensated in the acousto-optic device (70) to an interaction zone with the laser signal. In a second aspect, a delay means (400) is associated with a repetitive signal input and the pulse generator (120) for causing the basic frequency comb signal to be delayed in timing from the pulses of the repetition signal, thereby compensating for group delay of the bandpass filtering. According to a third aspect of the bandpass filter (300) is controllable in terms of the center frequency.