Abstract
For reducing both extreme ultraviolet attosecond pulses energy loss in the focusing reflection process and measurement error caused by pulse focusing aberration, as well as improving the operability of pulse spectroscopy monitoring, a combined focusing and flat-field spectrometer analysis system for attosecond pulse is proposed and designed through step-by-step performance optimization. The focusing and spectrum-analyzing components are gold- coated grazing incidence to roidal mirror and grazing incidence concave focusing grating, respectively. The characteristic parameters of the system are given in details. The system proposed can find application in research platform of attosecond spectroscopy using high energy short attosecond pulse as basic probe tool.
Highlights
For reducing both extreme ultraviolet attosecond pulses energy loss in the focusing reflection process and measurement error caused by pulse focusing aberration, as well as improving the operability of pulse spectroscopy monitoring, a combined focusing and flat-field spectrometer analysis system for attosecond pulse is proposed and designed through step-by-step performance optimization
With the mature of carrier-envelop phase (CEP) stabilized few cycle laser technology, the strong field optics is shifting from the stage of perturbative to extreme nonlinear optical mechanism, of which one of the most exciting achievements is the establishment of new light source—single isolated attosecond laser pulse in extreme ultraviolet (XUV) or even X-ray electromagnetic spectrum based on strong field high-order harmonic generation
An attosecond research upsurge is overwhelmingly rising from physics, chemistry and materials science to even information processing and other fields [2]-[12]
Summary
With the mature of carrier-envelop phase (CEP) stabilized few cycle laser technology, the strong field optics is shifting from the stage of perturbative to extreme (or nonperturbative) nonlinear optical mechanism, of which one of the most exciting achievements is the establishment of new light source—single isolated attosecond laser pulse in extreme ultraviolet (XUV) or even X-ray electromagnetic spectrum based on strong field high-order harmonic generation The world record of the shortest pulse is 67 as [10]. It is regarded as one of the mail goals in attosecond science to produce the even shorter pulse of sub-24 as with μJ energy per pulse in the future [1]. Compared with that in visible or near infrared regionthe optics elements for propagating and analyzing these ultrashort pulses should be adjusted for its ultra-broad electromagnetic spectrum. We proposed a combined focusing and flat-field spectrum-analyzing system based on a grazing incidence toroidal focusing mirror and toroidal concave grating. The simulated results related are given, together with the characteristic system parameters
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