Method and device for fast phase evaluation of multi-period pulses, in particular of laser radiation

Abstract

The aim of the present disclosure is to enable a fast CE phase evaluation of the laser pulses, in particular in real time, including for multi-cycle pulses. Said aim is achieved by providing a polarization gating stage (8) for changing the laser pulses (7) to be evaluated in the phase and subsequent phase evaluation stage (15) for measuring the phase position of the changed laser pulses. The descriptions in the present disclosure can be used for example in laser technology for producing and monitoring single-cycle pulses.

Description

technical field [0001] The invention relates to a method and a device for fast phase evaluation of multi-period pulses, in particular of laser radiation. Background technique [0002] The absolute phase is defined as the offset between the maximum and the nearest maximum of the pulse envelope of the carrier wave of the electric field of the laser pulse. Absolute phase is often also referred to as carrier envelope phase (CEP). Thus, this is a quantity needed to describe the precise history of the electric field of any kind of laser pulse. CEP plays an important role, especially in laser pulses whose pulse envelope has a FWHM (full width at half maximum) of only a few optical periods (so-called cycle-scale pulses or monocycle pulses), because of the The electric field has a particularly large CEP-dependent asymmetry. However, CEP dependence was also observed in trials with multi-period pulses. [0003] Single-cycle pulses have been produced since 1997 (M.Nisoli, S.Stagira,...

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Problems solved by technology

[0010] 2) If △r reaches the size order of r, CEP measurement will no longer be feasible, because the uncertainty of CEP determination will become too large

Use of these techniques for rapid CE phase assessment is unknown

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