Deviations from the reciprocity theory of McCumber at low temperature in Nd3+-doped glasses

Autor:	Richard S. Quimby, Rodica Martin
Rok vydání:	2007
Předmět:	Laser linewidth Wavelength Physics and Astronomy (miscellaneous) McCumber relation chemistry Reciprocity (electromagnetism) Analytical chemistry chemistry.chemical_element Emission spectrum Atomic physics Luminescence Neodymium Spectral line
Zdroj:	Applied Physics Letters. 90:221104
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.2743953
Popis:	The reciprocity theory of McCumber [Phys. Rev. 136, A954 (1964)], which relates optical absorption and emission spectra between two energy level manifolds, was tested at temperatures down to 130K on the F3∕24→I9∕24 transition in Nd-doped glass. Deviations between calculated and measured spectra were observed for temperatures below 230K in Nd:silicate and below 170K in Nd:fluorozirconate glass. Below these temperatures, the calculated absorption is skewed to shorter wavelength and the calculated emission is skewed to longer wavelength. The magnitude of the deviation depends on the ratio of inhomogeneous linewidth to thermal energy kBT.
Databáze:	OpenAIRE
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