A numerical model of the thermoreflectance of doped SiC substrate and typical numerical results are presented. The model considers the temporal response of the electron temperature and the number density of the electronic carriers. Calculated results show steep increase of electron temperature and the resulting increase of reflectivity. As a result, the reflected laser pulse is compressed by means of the temporal response of the thermoreflectance characteristics of SiC substrate. The technique can be used for the compression of ultrashort pulse laser light.

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In temperature measurement of fluid flows, heat conduction along the temperature sensor body and its support may cause large measurement errors. In the present study, a novel theoretical scheme for estimating the heat-conduction error has been proposed to obtain accurate temperature measurements in flow fields with mean-temperature gradients. The validity of the scheme has been verified experimentally to appraise the reliability and applicability of the present physical model for analyzing the heat-conduction error. The results show that the proposed scheme enables us to evaluate accurately the heat-conduction error in temperature measurement and provides not only a useful guideline for selecting appropriate temperature sensors but also a reliable method for compensating for the heat-conduction error in fluid-temperature measurement.

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