共查询到18条相似文献,搜索用时 562 毫秒
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本文阐述了在中国原子能科学研究院“天光一号”KrF激光核聚变实验装置上,MOPA系统光学元件加工与镀膜研究工作的进展。实验测量结果表明,加工后的基片表面均方根粗糙度对于K9光学玻璃与熔融石英玻璃来说分别为σrms=1.8±0.5nm,σrms=2.0±0.4nm。镀HfO2/SiO2高反射膜的光学元件的反射率与破坏阈值分别为R>99.5%,Eth=1.30~1.33J/cm2。镀Al2O3/MgF2增透膜的光学元件的透射率与破坏阈值分别为T>99.5%,Eth=1.3~1.97J/cm2。 相似文献
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反应离子镀光学薄膜的微观结构分析 总被引:2,自引:1,他引:1
用反应离子镀方法制备了TiO2单层膜及TiO2/SiO2多层膜,用透射电子显微镜分别观察了由反应离子镀方法及传统蒸镀法二种不同工艺制得的TiO2单层膜及TiO2/SiO2多层膜的断面结构,并对TiO2单层膜进行了喇曼分析和卢瑟福背散射分析。 相似文献
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双离子束溅射沉积薄膜的光学特性与激光损伤研究 总被引:5,自引:1,他引:4
对氧化物薄膜的双离子束溅射沉积作用了系统地实验研究。考察了离子束溅射工艺参数对薄膜光学特性的影响。制备了折射率接近于块材料的TiO2和ZrO2薄膜,显著降低了TiO2,ZrO2和SiO2薄膜的光吸收损耗,TiO2和ZrO2薄膜的抗激光损伤阈值得到显著提高。用双离束溅射沉积1.06μm多层高反,是到了大于99.5%的高反射率,经高温退火处理的双离子束溅射沉积高反膜的抗激光损伤阈值同热蒸发沉积的高反膜 相似文献
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玻璃基片上SiO_2膜层厚度的测量方法 总被引:1,自引:0,他引:1
钠钙玻璃基片在液晶显示器件(LCD) 等制造业中得到了广泛的应用。为防止基片中的碱金属离子扩散到器件的工作介质中,进而影响其化学稳定性和使用寿命,一般要在基片表面镀上一定厚度的SiO2 膜层,以便起到阻挡层的作用。基于P 蚀刻剂对SiO2 膜层和基片有显著不同的蚀刻速度,提出了一种测量玻璃基片上的SiO2 膜层厚度的方法,即:利用表面轮廓仪,在测量三个不同的蚀刻数据后,计算出SiO2 膜层的厚度。以用射频溅射法制备的SiO2 膜层为样品进行了测量,具体的实验数据证实了该方法的可靠性和有效性 相似文献
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全固态多波长飞秒脉冲激光系统 总被引:1,自引:1,他引:0
利用棱镜对引进频谱空间啁啾来补偿飞秒脉冲激光二次谐波产生中的相位失配,提高了倍频效率建立了一套全固态、多波长(1065nm, 532nm,823.1nm, 402nm)飞秒脉冲激光系统自制的Nd:YVO4激光器输出532nm绿光激光,最高平均功率可达5.6W当用2.5W绿光激光泵浦时,从自制的钛宝石激光器及经BBO倍频可分别输出中心波长为823.1nm和402nm,平均功率300mW和73mW,谱宽32.3nm和5.1nm,脉宽22fs和33.3fs、重复率108MHz的近红外和蓝光激光整个系统具有结构紧凑、倍频效率高、运行稳定的特点. 相似文献
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J. Zhang K. Sugioka K. Midorikawa 《Applied Physics A: Materials Science & Processing》1999,69(7):S879-S882
This paper reports the micromachining of fused quartz and Pyrex glass by laser-induced plasma-assisted ablation (LIPAA) using a conventional nanosecond laser at wavelengths 266 nm, 532 nm, and 1064 nm, respectively. High-quality surface structuring can be achieved at each of these wavelengths. The micrograting formed has periods of 14 7m at 266 nm, 20 7m at 532 nm, and 30 7m at 1064 nm, respectively. The ablation rate using a 266 nm laser is much larger than that at longer wavelengths. The ablation thresholds of laser fluence are 0.7 J/cm2 for 266 nm, 1.5 J/cm2 for 532 nm and 3.7 J/cm2 for 1064 nm, respectively. The 532 nm and 1064 nm lasers enable hole drilling in 0.5 and 2.0-mm thick fused quartz and Pyrex glass substrates of about 0.7-0.8 mm in diameter. However, the less destructive through channel can be only formed in Pyrex glass by using a 532 nm laser. 相似文献
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本文报道了利用Nd:YAG激光器产生的1.064μm的红外激光脉冲和二次谐波倍频后的532um的激光脉冲进行水深测量的模拟实验研究.实验通过探测水面的红外回波及水下的反射回波信号来实现水深的探测.文章介绍了实验原理和实验过程,并对实验结果进行了分析和讨论. 相似文献
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Experimental researches on frequency upconverted processes in Er3+ and Er3+/Yb3+-doped silica optical fibers are reported. These processes include frequency upconverted fluorescent light at wavelength of 466 (468) nm in Er3+/GeO2/SiO2 (Er3+/A13+/GeO2/SiO2) optical fibers and at wavelengths of 467, 546, and 667 nm in Yb3+/Er3+/GeO2/SiO2 optical fibers pumped by CW 1064 nm radiation, second harmonic generation (1064 nm-532 nm) with high peak power conversion efficiencies in Er3+ and Er3+/Yb3+-doped optical fibers, and 977 nm resonance enhanced antistokes of stimulated four-photon mixing in an Er3+ doped optical fiber pumped by high peak power 1064 nm radiation. 相似文献
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在电子束泵浦Ar、Kr、F2混合气体中,获得了中心波长为415nm的三原子准分子Kr2F的蓝色激光发射。在总气压为0.3MPa条件下,激光输出能量达到2mJ,光谱带宽约15nm。在采用平–平谐振腔时,激光发射角为5mrad,实验中首次观测到370nm等多条激光振荡谱线。 相似文献
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We report the properties of a compact diode-pumped continuous-wave Nd:GdV04 laser with a linear cavity and different Nd-doped laser crystals. In a 0.2at.% Nd-doped Nd:GdVO4 laser, 1.54 W output laser power is achieved at 912nm wavelength with a slope efficiency of 24.8% at an absorbed pump power of 9.4W. With 0.3at.% Nd-doping concentration, we can obtain the either single-wavelength emission at 1064nm or 912nm or the dual-wavelength emission at 1064nm and 912nm by controlling the incident pump power. From an incident pump power of 11.6 W, the 1064nm emission between ^4Fa/2 and ^4I11/2 is suppressed completely by the 912nm emission between ^4Fa/2 and ^4I9/2. We obtain 670 mW output of the 912nm single-wavelength laser emission with a slope efficiency of 5.5% by taking an incident pump power of 18.4 W. Using a Nd:GdV04 laser with 0.4at.% Nd-doping concentration, we obtain either the single-wavelength emission at 1064nm or the dual-wavelength emission at both 1064nm and 912nm by increasing the incident pump power. We observe a strong competition process in the dualavelength laser. 相似文献
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单次通过周期极化KTiOPO4晶体和频单块非平面环形腔1064 nm与1319 nm激光产生连续单频589 nm黄光. 通过琼斯矩阵模拟计算对单块非平面Nd:YAG晶体参数进行了优化设计, 实验获得1080 mW和580 mW的连续单频1064 nm和1319 nm激光输出. 两束激光单次通过周期极化KTiOPO4晶体和频产生14.8 mW, M2=1.14的589 nm黄光, 相应的和频效率为0.9%. 研究了周期极化KTiOPO4温度对和频效率的影响, 得到其温度接收带宽为1.5℃. 通过改变1064 nm Nd:YAG晶体的温度可实现589 nm黄光波长精确对应钠原子D2a吸收谱线, 调谐精度达到0.164 pm. 相似文献