초록 ▼

A measuring device completely determines the characteristics of light pulses in a beam of ultrashort light pulses using optoelectronic detectors instead of second harmonic generating crystals. An optical system provides a spatial dispersion of an ultrashort pulse in at least one dimension. A two sli

A measuring device completely determines the characteristics of light pulses in a beam of ultrashort light pulses using optoelectronic detectors instead of second harmonic generating crystals. An optical system provides a spatial dispersion of an ultrashort pulse in at least one dimension. A two slit filter intercepts the dispersed beam whereby the transmitted spectra combine to provide a beat frequency within selected limits. An optoelectronic detector detects the beat frequency and outputs a signal functionally related to the beat frequency that contains spectral phase information that is sufficient to characterize the pulse. In another embodiment, a beam splitter splits the beam into first and second beams, wherein one of the beams is time delayed and the other beam is spectrally dispersed. The two beam are recombined to provide information about the spectral phase of the ultrashort pulse. The pulse is completely characterized when the spectral phase information is combined with amplitude information.

대표청구항 ▼

[ What is claimed is:] [1.] A measuring device for determining characteristics of at least one light pulse in a beam of ultrashort light pulses, comprising:optical means for providing a spectral dispersion of said ultrashort pulses in at least one dimension;a two-slit filter intercepting said spectr

[ What is claimed is:] [1.] A measuring device for determining characteristics of at least one light pulse in a beam of ultrashort light pulses, comprising:optical means for providing a spectral dispersion of said ultrashort pulses in at least one dimension;a two-slit filter intercepting said spectral dispersion wherein said two slits are displaced a distance effective to transmit first and second frequencies of said spectral dispersion to provide a beat frequency within selected limits;an optoelectronic detector effective to detect said beat frequency and output a signal functionally related to said beat frequency, which contains spectral phase information that is sufficient to characterize the ultrashort light pulse.