Conclusion
Luminescent materials: techniques of optical and spectroscopic characterization

Tools for optical and spectroscopic characterization of luminescent materials are of course constantly evolving, but most of the techniques presented in this article will remain the same for a long time to come, at least in principle. Many are based on new-generation laser sources. This is the case, for example, with optical parametric oscillators (OPOs), which make it possible to analyze phenomena over increasingly wide wavelength ranges. This is likely to soon be the case with super-continuum fiber laser sources. Spectrum analyzers have also evolved enormously. Diffraction grating monochromators will of course continue to be the most widely used, as they are extremely flexible in use and often enable the grating and associated detector to be adapted to the wavelength range to be studied and the desired spectral resolution. OSA (Optical Spectrum Analyser) type systems will certainly be...