Photo-induced thermal phenomena are omnipresent in precision optical systems. Interferential filters are subjected to optical powers that are weakly absorbed but lead to temperature rises that can alter system performance: spectral drift, wave-front modification, damage, etc. In addition, absorption processes lead to heat transfers by conduction, radiation and convection that are important to predict or control. In this context, we have developed a comprehensive model dedicated to photo-induced thermal phenomena in interference filters, with the particularity that these models are developed and implemented with the same tools commonly used to address optical properties in thin films. These results lead us to address a number of inverse problems concerning the determination of thermal parameters or imaginary indices of thin-film materials, as well as the control of thermal radiation. Also, we investigate the detail of thermal energy transferred to the guided modes of a multilayer.
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