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Optical planar waveguides in Yb<sup>3+</sup>-doped phosphate glasses produced by He<sup>+</sup> ion implantation 下载免费PDF全文
Optical planar waveguides in Yb 3+-doped phosphate glasses are fabricated by implanting triple-energy helium ions. The guiding modes and the near-field intensity distribution are measured by using the prism-coupling method and the end-face coupling setup with a He-Ne laser at 633 nm The intensity calculation method (ICM) is used to reconstruct the refractive index profile of the waveguide. The absorption and the fluorescence investigations reveal that the glass bulk features are well preserved in the active volumes of the waveguides, suggesting the fabricated structures for possible applications as waveguide lasers. 相似文献
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Spectroscopic properties of Yb~(3+)-doped TeO_2–BaO–BaF_2–Nb_2O_5-based oxyfluoride tellurite glasses 下载免费PDF全文
A series of oxyfluoride glasses with the compositions of 75 mol% TeO2, 10 mol% Nb2O5,(15 mol%-x) BaO, x BaF2(x = 0 mol%, 5 mol%, 10 mol%, 15 mol%) doped with Yb2O3 were prepared by the melt-quenching method. Their emission cross-sections, fluorescence lifetimes, and gain properties were investigated by using the absorption spectra and the fluorescence decay curves. The results show that by substituting BaF2 for BaO, the emission cross-section decreases from 1.37 pm2 to 1.21 pm2, and the fluorescence lifetime increases from 0.71 ms to 0.96 ms. These properties indicate that this oxyfluoride tellurite glass may have potential uses as the Yb2O3-doped gain medium in a solid laser. 相似文献
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聚氨酯与铁电陶瓷粉复合物的电致感应性能研究 总被引:4,自引:0,他引:4
利用双辊制备了一系列热塑性弹性体聚氨酯(PU)和铁电钛酸锆酸铅盐(PZT)的电感应PZT/PU复合物。X-衍射和SE镜结果显示,复合物中,在铁电相中PZT陶瓷粉呈现结晶态并且均匀分布在PU基体中,复合物的弹性模量和相对电容率随着复合物中PZT体积分数增加而升高,在高压电场下,低PZT含量的复合物呈现负的电致伸缩应力,当PZT体积分数增加到6%以上时,在某个临界电场下,复合物呈现出电致伸缩应力反转的特性,即电致伸缩应力从负转变为正,并且发生应力反转的临界电场随着复合物中PZT体积分数的增加而降低,PU的电致伸缩特性与PZT在高电场下极化反转效应结合,导致了PZT/PU复合物这种有趣的性能,因此PZT/PU复合物将在高电压场方面作为传感器开关材料得到广泛应用。 相似文献
4.
ICP-AES法测定丹参中的镉和铅 总被引:3,自引:0,他引:3
建立了利用电感耦合等离子体原子发射光谱(ICP-AES)法测定丹参中重金属元素Cd和Pb的方法,比较了干灰化法和湿化法两种样品处理方法对分析结果的影响,并测定了山东一些地区丹参中的Cd和Pb含量.结果表明:采用电感耦合等离子体原子发射光谱法检测丹参中的Cd和Pb,最低检出限(DL)分别为1.92和1.07 ng·mL-1;相对标准偏差(RSD)分别为3.14%和1.83%;回收率分别为103.05%和96.24%.利用湿法消解样品,精密度好,回收率高,优于干灰化法.干灰化法适合测定丹参中Pb,但不适合测定Cd,其回收率仅为0.1%.用湿法消解样品,测定不同产地丹参的Cd和Pb含量,结果表明:所测地区丹参的Cd,Pb含量大大低于《中华人民共和国药典》(2005)规定的中药材重金属含量标准,符合GAP生产的要求. 相似文献
5.
研究建立了ICP—AES同时测定TiNi形状记忆合金中Co、Cu、Cr、Fe、Nb5元素的方法。进行了必要的条件试验,选择了分析线及其他仪器工作参数;考察了方法检出限、H2SO4酸度及基体钛、镍对测定的影响、工作曲线线性。进行了准确度和精密度试验,各元素的加标回收率为Co98.4%。99.6%、Cu98.0%~103%、Cr98.9%~99.6%、Fe94.6%~95.8%、Nb99.8%。102%。5种元素的相对标准偏差范围为4.2%-10%。 相似文献
6.
Optical planar waveguides in yb3+-doped phosphate glasses produced by He+ ion implantation 下载免费PDF全文
Optical planar waveguides in Yb 3+-doped phosphate glasses are fabricated by implanting triple-energy helium ions. The guiding modes and the near-field intensity distribution are measured by using the prism-coupling method and the end-face coupling setup with a He-Ne laser at 633 nm The intensity calculation method (ICM) is used to reconstruct the refractive index profile of the waveguide. The absorption and the fluorescence investigations reveal that the glass bulk features are well preserved in the active volumes of the waveguides, suggesting the fabricated structures for possible applications as waveguide lasers. 相似文献
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We report on the fabrication and properties of an optical waveguide in Nd~(3+)-doped phosphate glass. The planar waveguide was obtained by 550-ke V proton implantation with a dose of 8.0×10~(16) ions/cm~2. The proton–glass interaction was simulated by the stopping and range of ions in matter(SRIM software). The characteristics of the waveguide including the refractive index profile and the near-field intensity distribution were studied by the reflectivity calculation method and the end-face coupling technique. The optical waveguide demonstrated multi-mode behavior at the wavelength of 632.8 nm.The propagation features of the proton-implanted Nd~(3+)-doped phosphate glass waveguide shows its potential to operate as an integrated photonic device. 相似文献
10.
Optical properties of He+-implanted and diamond blade-diced terbium gallium garnet crystal planar and ridge waveguides 下载免费PDF全文
Jia-Li You 《中国物理 B》2022,31(11):114203-114203
Terbium gallium garnet (Tb3Ga5O12, TGG) crystal can be used to fabricate various magneto-optical devices due to its optimal Faraday effect. In this work, 400-keV He+ ions with a fluence of 6.0×1016 ions/cm2 are irradiated into the TGG crystal for the planar waveguide formation. The precise diamond blade dicing with a rotation speed of 2×104 rpm and a cutting velocity of 0.1 mm/s is performed on the He+-implanted TGG planar waveguide for the ridge structure. The dark-mode spectrum of the He+-implanted TGG planar waveguide is measured by the prism-coupling method, thereby obtaining the relationship between the reflected light intensity and the effective refractive index. The refractive index profile of the planar waveguide is reconstructed by the reflectivity calculation method. The near-field light intensity distribution of the planar waveguide and the ridge waveguide are recorded by the end-face coupling method. The He+-implanted and diamond blade-diced TGG crystal planar and ridge waveguides are promising candidates for integrated magneto-optical devices. 相似文献