Chinese Optics, Volume. 17, Issue 3, 617(2024)
Influence of flow channel structure on characteristics of laser diode pumped flowing-gas rubidium vapor laser
Fig. 4. The change of laser output power with pump power under four flow directions at different gas flow rates
Fig. 5. Three-dimensional temperature distribution and flow distribution under four gas flow directions when pump power is 10000 W and the initial air inlet velocity is 10 m/s
Fig. 6. Three-dimensional flow field distribution under four gas flow directions when the pump power is 10000 W and the initial air inlet velocity is 10 m/s
Fig. 7. Three diagrams of channel cross-sectional areas of LD side-pumped Rb-FDPAL
Fig. 8. The relationship between laser output power and pump power at different gas flow rates and four kinds of channel cross-sectional areas
Fig. 9. Three-dimensional temperature distribution for three flow channel structures when the pump power is 10000 W and the initial air inlet velocity is 10 m/s
Fig. 10. Three-dimensional flow field distribution for three flow channel structures when the pump power is 10000 W and the initial air inlet velocity is 10 m/s
Fig. 11. Comparison of the vii structure with the cross-sectional area of 81 cm2 (a) before and (b) after optimization
Fig. 12. The relationship between laser output power and pump power at different gas flow rates under vii and viii structures
Fig. 13. Three-dimensional temperature distributions under structures (a) vii and (b) viii
Fig. 14. Three-dimensional flow field distributions under structures (a) vii and (b) viii
Fig. 15. The average particle number concentration in the cell as a function of flow velocity
Fig. 16. The laser spot pattern for the channel structure vii with the gain zone length of 5 cm. (a) 2D; (b) 3D
Table 1. Partial thermophysical properties of buffer gases
View tableView in ArticleTable 1. Partial thermophysical properties of buffer gases
缓冲气体 恒压热容 (J·kg−1·K−1) 粘滞系数 (Pa·s) 导热系数 (W·m−1·K−1) 氦 5193.2 3×10−8×T+1×10−5 0.0003×T+0.0897 乙烷 3.9×T+600.3 3×10−8×T+2×10−5 0.0002×T−0.035
Table 2. Parameters of gas flowing diode pumped rubidium laser
View tableView in ArticleTable 2. Parameters of gas flowing diode pumped rubidium laser
参数 值 参数 值 泵浦光中心波长(nm) 780 蒸气池增益长度(cm) 5 泵浦光光斑大小(cm×cm) 5×0.2 反射镜M3反射率 99% 泵浦光线宽(GHz) 30 耦合输出镜M4反射率 50% 缓冲气体压强(atm) 1 流动气体初始温度(K) 393.15
Table 3. Comparison of the experimental results for different flow channel structures
View tableView in ArticleTable 3. Comparison of the experimental results for different flow channel structures
参数 文献[ 13 ]文献[ 14 ]气体流道结构 vi结构 v结构 泵浦功率(W) 3100 65 泵浦线宽(GHz) 24.8 20 蒸气池温度(K) - 388 气体流速( ${\mathrm{m}} \cdot {{\mathrm{s}}^{ - 1}}$ )>8 1~4 激光输出功率(W) 1500 24 本模型仿真的激光输出功率 1587 27 光-光转换效率 48% 36% 本模型仿真的光-光转换效率 51% 41%
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Li PAN, Yang HE, Li-guo MA, Yan-hui JI, Jin-dai LIU, Fei CHEN. Influence of flow channel structure on characteristics of laser diode pumped flowing-gas rubidium vapor laser[J]. Chinese Optics, 2024, 17(3): 617
Category: Original Article
Received: Oct. 8, 2023
Accepted: Dec. 5, 2023
Published Online: Jul. 31, 2024
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