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光学学报1985年第5卷第8期 目录
【出 处】
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光学学报
【发表日期】
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1985年5期
其他文献
A novel method for obtaining a single shot multi-point high dynamic range pulse contrast measurement is presented. We use Dammann gratings to generate multiple beamlets by division of amplitude on ultrashort laser pulses. The analysis results show that th
本文报道了水溶液生长的K2H(IO3)2Cl单晶室温下喇曼光谱,有几条谱线的喇曼散射效率很高,说明该晶体可能作为喇曼频移器的材料,谱图中包含有氢键(O一H—O)的特征振动频率,在90°散射几何配置y(xx)z和z(yy)x下,观测到的A1(TO LO)表示的谱图明显地不相同,晶体易遭受到光损伤。
期刊
本工作以SiO2和SiO2-TiO2凝胶体系为基质,选择合适的溶剂,采用特定的溶胶-凝胶工艺,成功地将纯的C60和C60/C70混合物分别均匀掺入上述基质中.研究了吸收与荧光光谱特性.室温下观测到峰置位于660 nm附近的较强荧光带.对上述光谱性质作了初步的解释.
Topological scattering singularities and embedded eigenstates for polarization control and sensing a
Epsilon-near-zero and epsilon near-pole materials enable reflective systems supporting a class of symmetry-protected and accidental embedded eigenstates (EEs) characterized by a diverging phase resonance. Here we show that pairs of topologically protected
期刊
Soluble microneedles (MNs) have recently become an efficient and minimally invasive tool in transdermal drug delivery because of their excellent biocompatibility and rapid dissolution. However, direct monitoring of structural and functional changes of MNs
In a photonic crystal composed of anisotropic constituents we quantify the range of input angles and the degree of collimation of the beam inside the crystal. The optical properties of a photobleached 4-dimethylamino-N-methyl-4-stilbazolium-tosylate (DAST
Computational ghost imaging(CGI) has recently been intensively studied as an indirect imaging technique. However, the image quality of CGI cannot meet the requirements of practical applications. Here,
澳大利亚新南威尔士大学物理组的一项发现已使制造第一台伽玛射线激光器（或称伽玛激光器-Graser)成为可能。伽玛激光的波长只有普通激光波长的百万分之一，它将在科学和工业上获得广泛的应用。发现者相信，伽玛激光器将使激光技术，特别是物质精细结构的分析方面发生革命性的变革。它将第一次使人们能够“看到”原子，并使原子物理学家和化学家能够研究原子和分子的三维图象。
期刊
在空间光通信系统中,激光在大气中传输时容易受湍流效应影响,且接收端往往使用模场半径极小的单模光纤进行空间光耦合,导致光纤耦合效率降低,影响通信系统性能。为了提高接收端光纤耦合效率,结合随机并行梯度下降(SPGD)算法和少模光纤耦合解复用系统对动态湍流所引起的波前相位畸变进行补偿校正,并实现了传输距离为5 km的空间光通信数值仿真。仿真结果表明:在不同的湍流强度和风速条件下,未经SPGD算法校正时,两模光纤的耦合效率比单模光纤提高了0.5 dB~1.5 dB,相对标准差降低了0.03~0.4;经过SPGD算