High Power Laser and Particle Beams, Volume. 35, Issue 2, 021003(2023)
Simulation analysis of thermal effect of laser irradiation in infrared detection system
Figures & Tables(12)
Fig. 3. Temperature curve of each lens within 10 s after irradiation with average laser irradiance of 50 W/cm2
Fig. 4. Maximum temperature of the system varies with time under different laser irradiance
Fig. 5. Thermal strain cloud image of detector irradiated by laser for 10 s
Fig. 6. Thermal stress cloud images of detector irradiated by laser for 10 s
Fig. 7. The thermal deformation of the mirror under different laser irradiance
Fig. 8. Curve of the amount of secondary irradiation on target surface with time
Table 1. Model parameter list
View tableView in ArticleTable 1. Model parameter list
parts geometric radius/mm waist radius/mm grid type grid size/mm grid number primary mirror 51 51 Hex 3 2100 secondary mirror 18.5 18.5 Hex 3 417 corrective lens 12.5 8 Hex 1.5 786 target 5.5 — Hex 1 449 hood 125 51 Hex 3 24858 fluid 150 — Tet 6 1116834
Table 2. Material parameters
View tableView in ArticleTable 2. Material parameters
material density/（kg·m−3） specific heat capacity/J·（kg·K）−1 thermal conductivity/W·(m·K)−1 absorption coefficient/m−1 refractive index Si 2328.3 700 148 864 1.5 MgF2 3177 1003 0.3 1.4 1.48 Al 2700 934.92 237 17 1 Air 1.225 1006.43 0.0242 0 1
Table 3. Material property parameters
View tableView in ArticleTable 3. Material property parameters
material density/（kg·m−3） elasticity modulus/GPa Poisson ratio dilatation coefficient/K−1 melting point/K Si 2330 190 0.24 2.5×10−6 1687 MgF2 3177 1.32 0.276 7×10−6 1528 Al 2700 70 0.3 2.46×10−6 933
Table 4. Maximum thermal stress and thermal strain of the detector for 10 s irradiation at different laser irradiance
View tableView in ArticleTable 4. Maximum thermal stress and thermal strain of the detector for 10 s irradiation at different laser irradiance
irradiation intensity/（W·cm−2） maximum stress/MPa maximum strain/μm 50 78.2 4.4 100 156.5 8.8 300 476.7 26.38 500 773.1 43.6
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Lei Yuan, Biyi Wang, Chao Luo, Wenzhong Li, Junjun Ran, Jian Liu. Simulation analysis of thermal effect of laser irradiation in infrared detection system[J]. High Power Laser and Particle Beams, 2023, 35(2): 021003
Paper Information
Category: High Power Laser Physics and Technology
Received: May. 16, 2022
Accepted: Oct. 12, 2022
Published Online: Feb. 16, 2023
The Author Email: Wang Biyi (wangbiyi530@163.com)
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