Emission Spectrum
摘要
This chapter provides a fundamental overview of the luminescenceLuminescence phenomena in glasses doped with rare-earth ionsRare-earth ions, essential for the development of emergent photonic technologies. It begins by distinguishing between Stokes and anti-Stokes luminescenceLuminescence, outlining the core energy transferEnergy transfer mechanisms. The principles of emission and excitation spectroscopy are detailed, using Pr3+-doped tellurite glass as a case study to demonstrate how an energy level diagram can be constructed to visualize transition pathways. A comprehensive analysis of the up-conversionUp-conversion process is presented, with a focus on an Er3+-doped glass system. This section provides an experimental guide for determining the number of photons involved in the up-conversionUp-conversion process by comparing calculations based on maximum peak intensity versus integrated band area calculations. The chapter also covers methods for calculating the emission cross-sectionEmission cross-section using the McCumber and Füchtbauer–Ladenburg relations. Finally, it introduces the principles of colorimetryColorimetry based on the CIE 1931 standard, demonstrating how to quantify colored light and engineer white light emission by co-doping with various rare-earth ionsRare-earth ions, thus offering a complete framework for analyzing the emission properties of these materials.