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Fundamental Optical Criteria to Optimize Tunable Solid State Laser Crystals

机译:优化可调谐固态激光晶体的基本光学标准

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Impurity ion-doped dielectric crystals have extensive applications in lasers, photodetectors, nonlinear crystals, displays, and scintillators. The performance of these devices is intrinsically correlated with their ability to transfer energy from the photoexcited impurity ion into the surrounding host. We have experimentally shown the importance of exact energy resonance between phonon and local modes in the decay pathway route of the nonradiative relaxation processes. Resonance Raman scattering and up-converted hot luminescence measurements performed in Cr(4+):Ca2GeO4 have shown that there is only one phonon-local mode pair at 733/cm whose exact energy resonance provides the decay channel during the initial steps of the nonradiative relaxation of the photoexcited impurity ion. By understanding these nonradiative decay mechanisms, we have developed criteria for laser crystals with reduced nonradiative relaxation.

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