Elsevier

Optical Materials

Volume 5, Issues 1–2, January 1996, Pages 97-103
Optical Materials

Study of migration in Cr:Er:YSGG using an upconversion light induced grating technique

https://doi.org/10.1016/0925-3467(95)00042-9Get rights and content

Abstract

An excitation migration over the level 4I112 was studied in Cr:Er:YSGG laser crystal using an upconversion nonholographic light induced grating (LIG) technique A long distance of migration (≃ μm) was found. The diffusion coefficient was determined to be equal to 7 × 10−7 cm2/s. This value was compared to that calculated in dipole-dipole approximation from the emission and absorption spectra overlap. The analysis shows, that excitation migration in Er:Cr:YSGG cannot be described in terms of dipole-dipole energy transfer, other possibilities are discussed.

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