DocumentCode
1421507
Title
Laser demonstration of Yb3Al5O12 (YbAG) and materials properties of highly doped Yb:YAG
Author
Patel, Falgun D. ; Honea, Eric C. ; Speth, Joel ; Payne, Stephen A. ; Hutcheson, Ralph ; Equall, Randy
Author_Institution
Lawrence Livermore Nat. Lab., CA, USA
Volume
37
Issue
1
fYear
2001
fDate
1/1/2001 12:00:00 AM
Firstpage
135
Lastpage
144
Abstract
We have demonstrated the first stoichiometric Yb3+ laser based on Yb3A5O12 (YbAG). The laser operated in pulsed mode with a highest possible duty cycle of 85%. A slope efficiency of 27%, with respect to absorbed energy, was measured and the free-running lasing wavelength was 1048 nm for a 10% duty cycle. In a systematic analysis, measurements of spectroscopic and materials properties of (YbxY1-x)3Al5O 12 for nominal x values of 0.05, 0.1, 0.15, 0.18, 0.25, 0.5, and 1 are reported. We also present a formalism to calculate the intrinsic fluorescence quantum efficiency (free of radiation trapping) and the fraction of reabsorbed light, based on measurements of the bulk and intrinsic emission lifetimes and the fractional thermal loading. Our best YbAG sample has an intrinsic lifetime of 0.664 ms at 94% quantum efficiency and a thermal conductivity at room temperature of 0.072 W/(cm-K)
Keywords
fluorescence; garnets; laser modes; laser transitions; optical materials; solid lasers; stimulated emission; thermal conductivity; ytterbium; ytterbium compounds; 0.664 ms; 1048 nm; 27 percent; 94 percent; YAG:Yb; YAl5O12:Yb; Yb3A5O12; Yb3Al5O12; YbAG; absorbed energy; duty cycle; fractional thermal loading; free-running lasing wavelength; highly doped Yb:YAG; intrinsic emission lifetimes; intrinsic fluorescence quantum efficiency; intrinsic lifetime; laser demonstration; materials properties; pulsed mode; quantum efficiency; reabsorbed light; room temperature; slope efficiency; spectroscopic properties; stoichiometric Yb3+ laser; systematic analysis; thermal conductivity; Energy measurement; Fluorescence; Laser modes; Material properties; Optical pulses; Spectroscopy; Temperature; Thermal conductivity; Thermal loading; Wavelength measurement;
fLanguage
English
Journal_Title
Quantum Electronics, IEEE Journal of
Publisher
ieee
ISSN
0018-9197
Type
jour
DOI
10.1109/3.892735
Filename
892735
Link To Document