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10篇 您的检索式:作者名="Y.T.Chow"
    题名 作者 年代 出处 被引量
1Nd∶GdVO_4晶体生长及其1064nm的激光特性显示文摘本文报道了用 Czochralski 方法生长 Nd∶ Gd V O4 晶体,测量了该晶体的偏振吸收谱和荧光谱,表明晶体在808 .5nm 有吸收峰,其发射波长在1064nm 。晶体中掺 Nd 浓度的原子分数为1 .56 % 的 Nd∶ Gd V O4 的4 F3/2 荧光寿命为100μs 。用激光二极管泵浦1m m 厚的 Nd∶ Gd V O4 晶体,得到了超过1 W1064nm 的输出光,泵浦阈值为20m W,光光转换效率为55 .9 % ,斜效率为63 % 。祝俐 张怀金 孟宪林 张宏臻 WangChangqing Y.T.Chow WangPu JudithDawes 1999人工晶体学报1999,28,3:14
2NdYVO_4晶体的偏振激发荧光光谱及其LD泵浦激光特性显示文摘分别利用π和σ偏振光激发,测量并对比了NdYVO4晶体的非偏振及偏振荧光光谱。研究了LD泵浦NdYVO4激光器的输出特性,当泵浦功率为1900mW时,获得了1012mW的1064nm激光输出,斜效率为53.6%。王长青 Y.T.Chow 孟宪林 邵宗书 1998中国激光1998,25,12:11
3测量薄膜折射率的几种方法显示文摘准确的测量薄膜的折射率对于集成光学器件设计和制造有着重要的意义。系统而详细地介绍了多年来在折射率测量上经常采用的几种方法,分别对其原理和特点进行了分析。孙香冰 任诠 杨洪亮 冯林 Y.T.Chow 2005量子电子学报2005,22,1:6
4Enhancement on the generation of sampled phase-only holograms显示文摘Past research has demonstrated that if the intensity image of an object is uniformly down-sampled and converted into a Fresnel hologram, the phase component alone will be sufficient to reconstruct the source image. However,due to down-sampling, the edge and line patterns are degraded heavily. In this Letter, we propose an enhancement on the parent method by incorporating an adaptive down-sampling lattice. A hologram generated with our proposed method, which is referred to as the edge-enhanced sampled phase-only hologram, preserves favorable visual quality on both the shaded regions as well as the edge patterns of the object image.P.W.M.Tsang Y.T.Chow T.-C.Poon 2015Chinese Optics Letters2015,13,6:3
5Nd^(3+)∶GdAl_3(BO_3)_4晶体的光谱性质和强度参数显示文摘报道了NdxGd1-xAl3 (BO3 ) 4(简称为NGAB)晶体的光学性质 .测量了NGAB晶体的折射率 ,室温吸收谱及室温荧光谱 .根据J_O理论计算了NGAB晶体的振子强度 ,拟合参数Ωλ(λ =2 ,4,6 )分别为 :Ω2 =1 80 5× 1 0 -2 0 ,Ω4=1 81 5× 1 0 -2 0 ,Ω6=3 793× 1 0 -2 0 (RMS =1 4× 1 0 -7) .计算了NGAB晶体的光谱参数 ,其中τtot=377.5 2 6 μs,βc( 4 F3 / 2 →4F11/ 2 ) =0 5 2 3.田丽莉 王继扬 魏景谦 潘恒福 管庆才 胡晓波 刘耀岗 王长青 Y.T.Chow 1998科学通报1998,43,18:2
6用视频摄像技术测定纳米晶聚合物复合薄膜的传输损耗显示文摘研制了一种新的钛酸铅 聚醚醚酮 (PT PEK c)纳米晶聚合物复合薄膜 ,用视频摄像技术准确、实时地分析了这种复合薄膜的传输损耗。该方法包括一架高分辨率的数码相机和相应的数据处理软件 ,以及棱镜耦合系统 ,其测量范围为 0 5~ 10 0dB/cm ,用这种方法测得PT PEK c纳米晶聚合物复合薄膜在 6 33nm处的传输损耗为 3 0 9dB/cm。吕增海 杨旭东 任诠 王雪亭 闾晓琴 孟凡青 马常宝 张光辉 Y.T.Chow 2001中国激光2001,28,10:2
7Spray freeze drying of small nucleic acids as inhaled powder for pulmonary delivery显示文摘The therapeutic potential of small nucleic acids such as small interfering RNA(siRNA) to treat lung diseases has been successfully demonstrated in many in vivo studies. A major barrier to their clinical application is the lack of a safe and efficient inhaled formulation.In this study, spray freeze drying was employed to prepare dry powder of small nucleic acids.Mannitol and herring sperm DNA were used as bulking agent and model of small nucleic acid therapeutics, respectively. Formulations containing different solute concentration and DNA concentration were produced. The scanning electron microscope(SEM) images showed that the porosity of the particles increased as the solute concentration decreased. Powders prepared with solute concentration of 5% w/v were found to maintain a balance between porosity and robustness. Increasing concentration of DNA improved the aerosol performance of the formulation. The dry powder formulation containing 2% w/w DNA had a median diameter of 12.5 μm, and the aerosol performance study using next generation impactor(NGI) showed an emitted fraction(EF) and fine particle fraction(FPF) of 91% and 28% respectively. This formulation(5% w/v solute concentration and 2% w/w nucleic acid) was adopted subsequently to produce siRNA powder. The gel retardation and liquid chromatography assays showed that the siRNA remained intact after spray freeze drying even in the absence of delivery vector. The siRNA powder formulation exhibited a high EF of 92.4%and a modest FPF of around 20%. Further exploration of this technology to optimise inhaled siRNA powder formulation is warranted.Wanling Liang Alan Y.L.Chan Michael Y.T.Chow Fiona F.K.Lo Yingshan Qiu Philip C.L.Kwok Jenny K.W.Lam 2018Asian Journal of Pharmaceutical Sciences2018,13,2:1
8钛宝石激光泵浦的1.06μm和1.34μm高效连续掺钕氟钒酸锶激光器显示文摘利用钛宝石激光作为泵浦源,实现了掺钕氟钡酸锶(NdSVAP)晶体在1.06μm和1.34μm的高效连续激光运转。在1.06μm和1.34μm处得到的最低泵浦阈值分别为2mW和2.4mW,最高斜效率分别为49.4%和37.4%,最大输出功率分别为336mW和165mW。王长青 Y.T.Chow 孟宪林 邵宗书 1999中国激光1999,26,2:0
9新型激光晶体Nd∶Gd_(0.8)La_(0.2)VO_4的生长及其激光性能的研究显示文摘张怀金 孟宪林 祝莉 张宏臻 WangPu JudithDawes WangChangqing Y.T.Chow 1998科学通报1998,43,13:0
10He+离子注入LiNbO3晶体波导的制备及其性能研究显示文摘报道了液氮温度下He+离子注入LiNbO3波导的制备,采用棱镜耦合法测量了波导退火前后各导模的有效折射率,计算了波导层折射率的分布和晶体中He+离子的射程分布和损伤分布,两者吻合得较好。卓壮 王克明 Y.T.Chow 李健 王象泰 1996光学学报1996,16,8:0
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