Four-wave mixing spectroscopy of Cr-doped laser crystals
1987; Elsevier BV; Volume: 38; Issue: 1-6 Linguagem: Inglês
10.1016/0022-2313(87)90118-9
ISSN1872-7883
AutoresRichard C. Powell, A. Suchocki, Guy D. Gilliland, Gregory J. Quarles,
Tópico(s)Laser-Matter Interactions and Applications
ResumoAbstract Four-wave mixing techniques were used to establish and probe population gratings of Cr3+ ions in different types of laser host crystals between 6 and 300 K. The variation of the signal decay rate with grating spacing was used to elucidate the properties of long-range spatial energy migration in these samples. These properties were found to be quite different for the various samples investigated, especially with respect to the role played by phonon processes. The variation of the signal intensity with write beam crossing angle was used to determine the pump band to metastable state radiationless decay rate. These were found to be in the ps time range and to approximately follow an exponential energy gap law with energy difference between the zero-phonon lines of the 4T2 and 2E levels.
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