Fourier-transform spectroscopy of the triply-ionised lanthanides in lithium yttrium fluoride (LiYF4) and barium yttrium fluoride (BaY2F8)

Abstract

The following is a study of several laser crystals in the spectral range 500-20000 cm-1. The selected crystals were Lithium Yttrium Fluoride (LiYF4), doped with triply ionised Neodymium (Nd3+:YLF), Holmium (Ho3+:YLF), Erbium (Er3+:YLF), Thulium (Tm3+:YLF) and Praseodymium (Pr3+:YLF) respectively and Barium Yttrium Fluoride (Ba Y 2Fg) doped with Neodymium (Nd3+:BYF). Although previous spectroscopic studies have been conducted for some of these crystals, (see the references), none to our knowledge have been measured by Fouriertransform spectroscopy with its extremely high resolution and absolute frequency accuracy. Previous studies were performed using diffraction grating spectrometers, where signal-to-noise considerations limit resolution and frequency calibration is done by comparison to some "standard". Sharp spectral features detected by us disagree in frequency with previous measurements by as much as 50 cm-1, which is 50 times the typical line width. In order to simplify and present the tables in a compact form, the following nomenclature is adopted. "Main transition" or "Main line" designates transitions originating from the ground level. "First replica" designates a transition from the first thermally populated excited level in the lowest Stark manifold, and so on. The center frequencies of the main transitions give the positions of the system's energy levels.

Notes

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Graduation Date

1992

Semester

Summer

Advisor

Peale, Robert E.

Degree

Master of Science (M.S.)

College

College of Arts and Sciences

Department

Physics

Format

PDF

Pages

114 p.

Language

English

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0029855

Subjects

Arts and Sciences -- Dissertations, Academic; Dissertations, Academic -- Arts and Sciences

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