Dual-wavelength and efficient continuous-wave operation of a Yb:CaGd0.1Y0.9AlO4 laser

The spectra and laser properties of single crystalline Yb:CaGd0.1Y0.9AlO4 were investigated for the first time. The peak absorption cross-sections of 4.01 cm2 and 1.39  ×  10−20 cm2 with full width at half maximum of 17 and 32 nm, and the maximum emission cross-sections of 2.11 and 1.53  ×  10−20 cm...

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Bibliographic Details
Published in:Laser physics 2018-05, Vol.28 (5)
Main Authors: Di, J Q, Sai, Q L, Sun, X H, Xu, X D, Kong, L C, Xie, G Q, Liu, Y L, Teng, F, Zhu, L
Format: Article
Language:English
Subjects:
AlO
dual-wavelength laser
spectral properties
Yb:CaGd
Online Access:Get full text
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Summary:The spectra and laser properties of single crystalline Yb:CaGd0.1Y0.9AlO4 were investigated for the first time. The peak absorption cross-sections of 4.01 cm2 and 1.39  ×  10−20 cm2 with full width at half maximum of 17 and 32 nm, and the maximum emission cross-sections of 2.11 and 1.53  ×  10−20 cm2 were obtained for π and σ polarizations, respectively. The fluorescence decay time was 638 µs. The maximum continuous-wave laser achieved was 1.60 W with a slope efficiency of 23.4% for an a-cut Yb:CaGd0.1Y0.9AlO4 crystal. Dual-wavelength lasers at 1041.7 and 1044.9 nm were also demonstrated. The results show that Yb:CaGd0.1Y0.9AlO4 crystal is a promising ultra-short and dual-wavelength laser medium.
ISSN:1054-660X
1555-6611
DOI:10.1088/1555-6611/aaad43