Acta Photonica Sinica, Volume. 54, Issue 6, 0614001(2025)
Study on LD Pumped Er∶YSGG Cascaded Laser at Room Temperature
Figures & Tables(10)
Fig. 2. Thermal simulation results of Er∶YSGG crystals with different doping concentrations
Fig. 4. Simulation results of pump light after passing shaping system
Fig. 6. Variation curve of infrared laser output with crystal temperature in Er∶YSGG crystal
Fig. 7. Near-infrared output spectrum of the Er∶YSGG cascade laser
Fig. 8. Schematic of the infrared output spectrum and the stark energy levels in the Er∶YSGG cascade
Table 1. Parameters of Er∶YSGG crystals for thermal simulation calculations
View tableView in ArticleTable 1. Parameters of Er∶YSGG crystals for thermal simulation calculations
Simulation parameters Value Simulation parameters Value λpump 969 nm Er3+ doping concentration 1 at.%，5 at.%，20 at.%，25 at.% ωp 0.12 mm α 0.34，1.22，4.90，5.82 cm-1 Pump power 30 W Crystal length 10 mm Kc 0.683 W/（m·K） Crystal diameter 3 mm Tb 15 ℃ dn/dT 7×10-6 K-1 h 27.5 W/（m2·K） Thermal expansion coefficient 8.2 K-1
Table 2. Upper and lower laser Stark sub-levels for different output wavelengths of Er∶YSGG
View tableView in ArticleTable 2. Upper and lower laser Stark sub-levels for different output wavelengths of Er∶YSGG
Wavelength /nm i→j αi βj αi/βj 2 799 4→5 0.144 4 0.085 5 1.631 6 ~2 827 5→7 0.126 3 0.062 6 2.017 6 ~2 870 2→5 0.219 3 0.085 5 2.564 9 ~2 925 2→7 0.219 3 0.062 6 3.503 2
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Shihui GUAN, Yang YU, Yusong JIAO, Chunqing GAO. Study on LD Pumped Er∶YSGG Cascaded Laser at Room Temperature[J]. Acta Photonica Sinica, 2025, 54(6): 0614001
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Received: Mar. 28, 2025
Accepted: May. 19, 2025
Published Online: Jul. 14, 2025
The Author Email: Chunqing GAO (gao@bit.edu.cn)
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