Author Affiliations
State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, Chinashow less
Fig. 1. Schematic of quartz tube holder and various testing points on quartz tube. (a) Quartz tube holder; (b) testing points
Fig. 2. Thickness uniformity distribution of single layer. (a) Al2O3 film; (b) TiO2 film
Fig. 3. Refractive index and extinction coefficient of materials. (a) Refractive index of Al2O3; (b) refractive index and extinction coefficient of TiO2
Fig. 4. Experimental and simulated reflectivities of single wavelength 550 nm AR coating
Fig. 5. Central wavelength deviations on outer surfaces of quartz tubes with different outer diameters. (a) Circumferential direction of outer surface; (b) axial direction of outer surface
Fig. 6. Central wavelength deviations on inner surfaces of quartz tubes with different inner diameters. (a) Circumferential direction of inner surface; (b) axial direction of inner surface
Fig. 7. Axial central wavelength deviations on inner and outer surfaces of quartz tubes with different lengths. (a) Axial direction of inner surface; (b) axial direction of outer surface
Fig. 8. Central wavelength distributions of quartz tube with outer diameter of 40 mm, inner diameter of 37 mm, and length of 50 mm. (a) Outer surface; (b) inner surface
Material | Substrate temperature /℃ | First reactant(pulse time) | Purge gas(purge time) | Second reactant (pulse time) | Purge gas(purge time) |
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TiO2 | 120 | TiCl4(0.35 s) | N2(6 s) | H2O(0.3 s) | N2(8 s) | Al2O3 | 120 | TMA(0.50 s) | N2(6 s) | H2O(0.3 s) | N2(8 s) |
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Table 1. Process parameters for preparation of Al2O3 and TiO2 based on ALD technology
Experimental group | Outer diameter/mm | Inner diameter/mm | Length/mm |
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| 23 | 20 | 20 | 1 | 26 | 20 | 20 | | 30 | 20 | 20 | | 40 | 37 | 20 | 2 | 40 | 34 | 20 | | 40 | 30 | 20 | | 40 | 34 | 30 | 3 | 40 | 34 | 40 | | 40 | 34 | 50 |
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Table 2. Quartz tube size
Outer diameter /mm | Circumferential non-uniformity /% | Axial non-uniformity /% | Total non-uniformity /% | Total non-uniformity except ±150° /% | Total averagecenter wavelength /nm |
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23 | 1.00 | 0.27 | 1.97 | 1.69 | 547 | 26 | 1.13 | 0.50 | 1.73 | 1.04 | 549 | 30 | 1.18 | 0.36 | 1.91 | 1.50 | 549 |
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Table 3. Non-uniformity on outer surfaces of quartz tubes with different outer diameters
Inner diameter /mm | Circumferential non-uniformity /% | Axial non-uniformity /% | Total non-uniformity /% | Total averagecenter wavelength /nm |
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37 | 0.68 | 0.68 | 1.59 | 551 | 34 | 0.36 | 0.72 | 1.49 | 552 | 30 | 0.49 | 0.59 | 1.26 | 553 |
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Table 4. Non-uniformity on inner surfaces of quartz tubes with different inner diameters
Position | Length /mm | Circumferential non-uniformity /% | Axial non-uniformity /% | Total non-uniformity /% | Total averagecenter wavelength /nm |
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| 30 | 0.78 | 0.78 | 1.10 | 543 | Inner surface | 40 | 0.37 | 0.83 | 1.48 | 542 | | 50 | 0.50 | 0.64 | 1.42 | 544 | | 30 | 0.83 | 0.64 | 1.29 | 544 | Outer surface | 40 | 0.46 | 0.27 | 1.47 | 546 | | 50 | 0.69 | 0.60 | 1.65 | 544 |
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Table 5. Uniformity of inner and outer surfaces of quartz tubes with different lengths