Qiao Chen, Wenqi Ge, Shengwei Bian, Tianqi Wang, Jisi Qiu. Thermal Effect of Side-Zigzag-Pumped Polygonal Nd∶YAG Thin Disk[J]. Chinese Journal of Lasers, 2022, 49(21): 2101002
- Chinese Journal of Lasers
- Vol. 49, Issue 21, 2101002 (2022)
Fig. 1. Schematics of side-pumped polygonal thin-disk gain medium. (a) Pumping structure; (b) crystal structure; (c) transmission path of pump light
Fig. 2. 3D diagram of beam-shrinking coupling structure and two-dimensional pump light intensity distributions before and after beam shrinking
Fig. 3. Schematics of side pumping at different medium cutting angles. (a) 90°；(b) 45°
Fig. 4. Distribution matrix of volume element absorbed flux in gain medium
Fig. 5. Two-dimensional normalized flux distributions of pump light on different sections in gain media with different cutting angles. (a) 90°；(b) 45°
Fig. 6. Absorption flux distribution curves of pump light in gain media with different cutting angles. (a) Radial；(b) axial
Fig. 7. 2D diagrams of temperature distributions in front face and axial direction of gain media with different cutting angles. (a) 90°；(b) 45°
Fig. 8. Surface temperature distributions of polygonal gain media with different cutting angles . (a) Radial; (b) axial
Fig. 9. Absorption flux distributions of pump light. (a) Simulation result; (b) measurement result of fluorescence distribution
Fig. 10. Experimentally measured surface temperature of crystal (unit: ℃)
Fig. 11. Experimentally measured peak-valley values and RMS values of thermal wavefront distortion of gain medium
Fig. 12. Experimentally measured slope efficiency of laser oscillator
Fig. 13. 3D distribution of beam intensity of oscillator output laser
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Table 1. Parameters of polygon thin-disk gain medium and pump source
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Table 2. Thermodynamic parameters of Nd∶YAG
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