PROPERTIES OF INFRARED NEODYMIUM LEVELS IN CHLORIDE CRYSTALS
Loading...
Date
1964
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The absorption, fluorescence and Zeeman spectra of the $^{4}I_{15/2}$ and $^{4}I_{13/2}$ neodymium levels were studied in the isomorphous series $LaCl_{3}, PrCl_{3}, NdCl_{3}$. The slightly changing crystal field is evidenced by small shifts of the individual Stark and Zeeman components. No fluorescence from these levels was detectable for $NdCl_{3}$, while LaCl$3, PrCl$3 as well as the mixed crystal $LaPrCl_{3}$ were found to be excellent hosts for infrared fluorescence. Gradual replacement of La with Pr enhances the neodymium fluorescence. A multichannel analyzer coupled to the infrared detector via a voltage-to-frequency converter is used to study the decay properties. The intensity of the $^{4}I_{13/2}$ fluorescence was observable for well above 100 milliseconds, corresponding to about four lifetimes and was found to follow a single exponetial.
Description
Author Institution: Bell Telephone Laboratories, Murray Hill