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采用溶胶凝胶法制备得到以正丙醇锆和正硅酸乙酯为前驱体的ZrO2和SiO2溶胶,通过TFCalc光学薄膜软件模拟了ZrO2/SiO2三层“宽M型”基频二倍频减反膜,并使用提拉法制备得到了该均匀膜层。三层减反膜在527 nm和1053 nm处的透过率约为99.5%,且透过率大于99%的波长范围均超过150 nm。经热处理后的膜层表面均方根粗糙度为1.34 nm,表面平整性良好;并运用1-on-1激光损伤阈值测试方法测得该减反膜的零几率激光损伤阈值达到36.8 J·cm-2(1064 nm,10.7 ns)。 相似文献
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A λ∕4–λ∕4 broadband antireflective(AR) coating is developed with a sol-gel dip-coating method. By adding SAR-5 organosilicon resin into a base-catalyzed silica sol top layer and treating at 300°C, a broadband AR coating used for blast shields with a high average transmission of 99.34%(450–950 nm) and good hydrophobicity(with a water-contact angle of 119°) was obtained. After being subjected to rubbing 50 times and being maintained at a relative humidity of around 95% for 50 days, the average transmission of the coating decreased by0.29% and 0.04%, respectively. This indicates that the organically modified silica(ORMOSIL) broadband AR coating has good abrasion resistance and humidity stability. 相似文献
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Porous SiO2 antireflective (AR) coatings are prepared from the colloidal silica solution modified with methyltriethoxysilane (MTES) based on the sol-gel route. The viscosity of modified silica suspensions changes but their stability keeps when MTES is introduced. The refractive indices of modified coatings vary little after bake treatment from 100 to 150℃. The modified silica coatings on Ti:sapphire crystal, owning good homogeneity, display prominent antireflective effect within the laser output waveband (750-850 nm) of Ti:sapphire lasers, with average transmission above 98.6%, and own laser induced damage thresholds (LIDTs) of more than 2.2 J/cm2 at 800 nm with the pulse duration of 300 ps. 相似文献
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以正硅酸乙酯为原料,采用溶胶-凝胶法制备SiO_2溶胶,通过提拉法涂制多孔SiO_2减反膜,并在多孔SiO_2减反膜上涂制一层甲基三乙氧基硅烷(MTES)预聚体。通过疏水的MTES预聚体涂制在多孔SiO_2减反膜上,对多孔SiO_2减反膜的表面进行改性,以提高膜层的环境稳定性。经过表面改性的复合膜层的透过率峰值可达99.67%,折射率为1.231,水接触角达123.6°,在相对湿度为95%的环境中放置475 d后膜层的峰值透过率为99.09%,稳定性提高明显。膜层表面平整,激光损伤阈值约为24.5 J/cm~2。 相似文献
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用激光测量高热可靠性电子器件的热变形 总被引:1,自引:0,他引:1
本文提出了一种测量大功率电子器件热变形的双曙光激光全息干涉法,针对一种可靠性要求很高的电子器件-火箭点火用固态继电器进行实际测试,试验结果表明,固态继电器在大负载功率工作状态时,芯片表面的干涉条纹较多,条纹弯曲程度较大,因此反映了芯片热变形和热应力增大趋势较为明显。 相似文献
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<正>In order to improve the laser-induced damage threshold(LIDT) of the ZrO_2 film,the effect of polyvinyl pyrrolidone(PVP) with different average molecular weight on coatings is studied.The ZrO_2 sol is prepared by the hydrolysis of zirconium n-propoxide with acetylacetone as the chelating agent.The PVP(K16-18) is more suitable to obtain high LIDT coatings than other PVPs.The LIDT of the ZrO_2-PVP coatings is improved with the increase of the PVP(K16-18) content.When the PVP(K16-18) content is 2.4 wt.-%, the LIDT of the ZrO_2-PVP coatings is 43.5 J/cm~2(1064 nm,12 ns).The ZrO_2 sol and ZrO_2-PVP(K16- 18) sol have the good stability in 3 months.The refractive indices of the ZrO_2-PVP coatings decrease with the increase of the PVP(K16-18) content. 相似文献
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磷酸盐激光玻璃聚(CH3)2 Si(OC2 H5)2防潮膜 总被引:1,自引:0,他引:1
以(CH3)2Si(OC2H5)2为前驱体,采用溶胶-凝胶与有机合成相结合的方法,制得稳定性良好的涂膜液。采用旋转涂膜法在掺钕磷酸盐激光玻璃棒端面涂制防潮膜,膜层固化后透过率达96.5%,获得的膜层表面粗糙度优良,均方根表面粗糙度(RMS)为1.659nm,平均粗糙度(RA)平均为1.321nm;在激光波长1053nm,脉冲宽度1 ns条件下膜层的激光破坏闽值可达10~14 J/cm^2。经过“神光Ⅱ”高功率激光器物理实验运行,膜层使用期为五年,并且已经在我国“神光Ⅲ”原型装置上试用。 相似文献
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