A carrier envelope phase measuring device of laser pulses and a method thereof

摘要

Disclosed are a device for measuring an absolute phase of a laser pulse and a method thereof. The absolute phase measuring device includes: an absolute phase changing unit adjusting an absolute phase of a laser pulse; a secondary harmonic wave generation unit generating a secondary harmonic wave by using the laser pulse; a beam time delay adjustment unit adjusting a time delay by receiving the generated secondary harmonic wave and the laser pulse; a focusing unit for receiving the adjusted laser pulse and the secondary harmonic wave to be focused by an ionizing material; and an ionization amount measuring unit measuring an ionization amount from the electron and the ion generated by the focused laser pulse and secondary harmonic wave. The absolute phase of the laser pulse is measured based on calculation of an ionization amount change amplitude varying with time delay in accordance with a change in an absolute phase. According to the present invention, no complex measuring device needs to be provided for measurement of an absolute phase value of a laser pulse, and thus costs can be reduced to increase product productivity. In addition, the exact value of the absolute phase, not a relative change in an absolute phase of a laser pulse, can be known, and thus measuring accuracy and product reliability can be increased.