Influence of optical window for gas detection on laser transmission under thermal pressing loads

Dong LI; Pinye LI; Di WANG; Yan LYU; Xi GUO

doi:10.5768/JAO202344.0107001

Journal of Applied Optics, Volume. 44, Issue 1, 195(2023)

Influence of optical window for gas detection on laser transmission under thermal pressing loads

Dong LI1... Pinye LI1, Di WANG1,2,*, Yan LYU1,2 and Xi GUO1 |Show fewer author(s)

Author Affiliations

¹School of Civil Engineering and Architecture, Northeast Petroleum University, Daqing 163318, China

²School of Physics and Electronic Engineering, Northeast Petroleum University, Daqing 163318, China

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Figures & Tables(12)

Fig. 1. Multi-component gas in-situ laser detection system and its simplified physical model

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Fig. 2. Deformation distribution of optical window under thermal pressing loads

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$Radial refractive index distribution and axial refractive index distribution of optical window under different working conditions$

Fig. 3. Radial refractive index distribution and axial refractive index distribution of optical window under different working conditions

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Fig. 4. Radiation distribution formed by receiving surface under different working conditions

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Fig. 5. Deformation distribution of optical window under different working conditions after purging

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$Radial refractive index distribution and axial refractive index distribution of optical window under different working conditions after purging$

Fig. 6. Radial refractive index distribution and axial refractive index distribution of optical window under different working conditions after purging

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Fig. 7. Radiation distribution formed on the receiving surface under different working conditions after purging

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Fig. 8. Laser transmission test platform of high-temperature optical window

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Fig. 9. Baseline fitting of detected signals at different temperatures

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Table 1. Material properties of optical window
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Table 1. Material properties of optical window
材料熔点/℃ 导热系数/W·(m·K)⁻¹ 线性膨胀系数/10⁻⁶·K⁻¹ 泊松比杨氏模量/GPa 断裂模量/MPa
熔融石英 1713 1.4 0.55 0.17 73.6 50

Table 2. Gradient refractive index fitting of optical window
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Table 2. Gradient refractive index fitting of optical window
工况拟合公式
工况1 $n = 4 \times 10^{- 9} n^{3} - 2 \times 10^{- 7} n^{2} + 8 \times 10^{- 6} n + 1.4474$
工况2 $n = - 8 \times 10^{- 9} n^{3} - 8 \times 10^{- 8} n^{2} + 1 \times 10^{- 5} n + 1.4478$
工况3 $n = - 1 \times 10^{- 8} x^{3} + 7 \times 10^{- 8} n^{2} + 1 \times 10^{- 5} n + 1.4482$

Table 3. Gradient refractive index fitting of lower optical window after purging
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Table 3. Gradient refractive index fitting of lower optical window after purging
工况拟合公式
工况1 $y = 5 \times 10^{- 9} n^{3} - 4 \times 10^{- 7} n^{2} + 5 \times 10^{- 6} n + 1.447$
工况2 $y = 1 \times 10^{- 8} n^{3} - 7 \times 10^{- 7} n^{2} + 7 \times 10^{- 6} n + 1.4473$
工况3 $y = - 5 \times 10^{- 9} n^{3} - 9 \times 10^{- 7} n^{2} + 9 \times 10^{- 6} n + 1.4477$

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Dong LI, Pinye LI, Di WANG, Yan LYU, Xi GUO. Influence of optical window for gas detection on laser transmission under thermal pressing loads[J]. Journal of Applied Optics, 2023, 44(1): 195

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