1 November 1997 Optical excitation and relaxation in active color centers
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Proceedings Volume 3176, Tunable Solid State Lasers; (1997) https://doi.org/10.1117/12.293440
Event: Tunable Solid State Lasers, 1996, Wroclaw, Poland
Color centers in alkali halide crystals possess a peculiar optical cycle, which delivers an emission very often with quantum efficiency near 1, a few of them having the qualities required by active media. Among these the FA center was the first one to lase, and it is the most stable, efficient and easy to be produced. However up to now, as far as its basic properties are concerned, it remains a rather elusive point defect.Indeed recent results brought up again for discussion the old classification between FA(I) and FA(II) centers, the last ones only being optical active centers. It has ben found that both species can coexist in the same host crystal, their relative number being a function of temperature. This phenomenon opens up new perspectives for studying in detail relaxation, thermal excitation, and energy transfer processes at a microscopic level after optical excitation.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Giuseppe Baldacchini, Giuseppe Baldacchini, } "Optical excitation and relaxation in active color centers", Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); doi: 10.1117/12.293440; https://doi.org/10.1117/12.293440

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