Analyser for short and ultra-short light pulses - for complete pulse characterisation, esp. for laser development and set-up

摘要

A measuring appts. for short and ultra-short light pulses consists of an arrangement of beam dividers and reflectors for dividing a beam into two pulses, a movable delay element (5, 8) for at least one of the pulses, an optical element (9) for producing a correlation signal for both pulses and a replaceable detection unit (17). The novelty is that the appts. includes an exchangeable plate (13) with optical components (14, 15). Also claimed is a method of analysing short and ultra-short laser pulses using the above appts.. The method involves directing a laser pulse into the above arrangement such that it is divided into two subsidiary pulses which are directed onto the optical element for prodn. of a correlation signal, this signal then being analysed to determine the light frequency and/or the travel time difference between the two subsidiary pulses.