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    • 3. 发明申请
    • METHOD AND SPECTROSCOPIC MEASURING APPARATUS FOR MEASURING A SPECTRAL RESPONSE OF A SAMPLE
    • WO2022194386A1
    • 2022-09-22
    • PCT/EP2021/057079
    • 2021-03-19
    • MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E. V.UNIVERSITAET WIEN
    • PUPEZA, IoachimHECKL, Oliver H.
    • G01J3/10G01J3/42G01J11/00
    • A method of measuring a spectral response of a sample (1) comprises the steps of generating probe light pulses (2) having a primary spectrum with a fs pulse laser source device (10), generating gate light pulses (3) with the fs pulse laser source device (10), wherein the gate light pulses (3) have an adjustable temporal relationship relative to the probe light pulses (2), irradiating the sample (1) with the probe light pulses (2), including an interaction of the probe light pulses (2) and the sample (1), and temporally resolved detecting of the probe light pulses (2) having a modified spectrum, which deviates from the primary spectrum as a result of the interaction of the probe light and the sample (1), said modified spectrum being characteristic of the spectral response of the sample (1), wherein the detecting step comprises electro-optic sampling a temporal shape of the probe light pulses (2) after the interaction with the sample (1), wherein the probe light pulses (2) and the gate light pulses (3) are superimposed with varying temporal relationship in an electro-optic element (21) for sampling the temporal shape of the probe light pulses (2), and the spectral response of the sample (1) is obtained based on the temporal shape of the probe light pulses (2). The fs pulse laser source device (10) comprises a multi color master oscillator (11) including at least one gain medium and generating a first laser pulse train (4) and a second laser pulse train (5), which have different repetition frequencies fr1 and fr2 = fr1 ± Δfr with a repetition frequency difference Δfr, wherein the probe light pulses (2) are generated using one of the first and second laser pulse trains (4, 5) and the gate light pulses (3) are generated using the other one of the first and second laser pulse trains (4, 5), and the temporal relationship of the gate light pulses (3) relative to the probe light pulses (2) is adjusted by setting the repetition frequency difference Δfr. Furthermore, a spectroscopic measuring apparatus (100) for measuring a spectral response of a sample (1) is described.