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Growth and Characterization of Yb: CALYGLO Crystal for Ultrashort Pulse Laser Applications.
- Source :
- Crystals (2073-4352); Feb2024, Vol. 14 Issue 2, p120, 12p
- Publication Year :
- 2024
-
Abstract
- Yb:CALYGLO crystals with a dopant concentration of 5 at.% were successfully grown using the Czochralski method. The crystal samples were extensively studied to analyze their structure, room temperature and low temperature spectra, and laser properties. The highest absorption cross-section at 977 nm was calculated to be 1.83 × 10<superscript>−20</superscript> cm<superscript>2</superscript> for σ polarization and 5.32 × 10<superscript>−20</superscript> cm<superscript>2</superscript> for π polarization. Similarly, the emission cross-section was determined to be 1.38 × 10<superscript>−20</superscript> cm<superscript>2</superscript> at 980 nm for σ polarization and 2.28 × 10<superscript>−20</superscript> cm<superscript>2</superscript> at 981 nm for π polarization, with a full width at half maximum (FWHM) of 50.3 nm and 89.5 nm, respectively. The fluorescence lifetime of the 5 at.% Yb:CALYGLO crystal at <superscript>2</superscript>F<subscript>5/2</subscript> was measured to be 1.10 ms. Additionally, gain cross-sections were calculated for different β values. In the continuous laser experiment, the crystal demonstrated a laser output of 20.15 W at 1057 nm, with a slope efficiency of 53.3%. These experimental findings indicate that the lattice of Y<superscript>3+</superscript> in the crystal is partially replaced by Lu<superscript>3+</superscript> and Gd<superscript>3+</superscript>, resulting in a broader spectrum. Consequently, this crystal shows promising potential as a gain medium for ultrashort pulse laser crystals. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734352
- Volume :
- 14
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Crystals (2073-4352)
- Publication Type :
- Academic Journal
- Accession number :
- 175652064
- Full Text :
- https://doi.org/10.3390/cryst14020120