利用电光相位调制和交叉相位调制制作时间透镜的实验及仿真分析

对时间成像理论进行简要研究. 利用电光相位调制器进行光脉冲压缩实验,并分别对基于电光相位调制和交叉相位调制的时间透镜组成的时间成像系统进行了仿真和讨论. 实验结果表明,基于电光相位调制的时间透镜组成的时间成像系统可以有效压缩光脉冲,但是该系统受到了孔径限制,压缩系数较小,分辨率较低. 进一步的仿真分析结果表明,基于交叉相位调制的时间透镜组成的时间成像系统不受孔径限制,能够获得更大的压缩系数和更高的分辨率,但是该系统的实现难度较大. 关键词： 光脉冲压缩 时间透镜 电光相位调制 交叉相位调制     

用激光法测量凹透镜焦距的探究

结合简单的几何原理,根据激光光源的特性提出了一种简便测量凹透镜焦距的新方法.     

Laser resonator with balanced thermal lenses

An adaptive negative thermal lens that compensates for the power-dependent positive thermal lens in a transversally diode-pumped Nd:YAG laser rod is presented. We demonstrate that the proposed technique leads to a reduction of the total thermal lens by more than an order of magnitude.     

ELID磨削技术及其在光学加工中的应用

简述ＥＬＩＤ磨削技术和机理及其优越性，并对它在光学非球面透镜加工中的应用作了简要介绍。     

More precise determination of thermal lens focal length for end-pumped solid-state lasers

A method of more precise determination of the focal length of equivalent thermal lens (TL) is presented in this paper. The method is based on the diffraction theory of aberrations. By numerically calculating the optical path difference (OPD) distribution and the Strehl ratio, the focal lengths for “top-hat” pumping and Gaussian pumping are obtained and the equations for the focal lengths are presented by curve fitting. Also the equations for average pump radii are presented. The experiment on a fiber-coupled LD pumped Nd:YAG laser is carried out. The experimental results verify the validity of the method.     

The validity of high-pass angular spectrum filter in solid immersion lens system

应用矢量方法计算了具有高通角谱滤波器的固体浸没透镜（SIL）系统的焦场分布。数值结果显示，对于径向（角向）偏振输入光，高通角谱滤波器可以减小SIL系统的光斑（暗斑）大小。然而，对于线性偏振输入光，简单的高通角谱滤波器不能够优化SIL系统的光场分布，也不能够改进系统的光存储密度。     

Topological Invariants for Lens Spaces and Exceptional Quantum Groups

The Reshetikhin–Turaev invariants arising from the quantum groups associated with the exceptional Lie algebras G2, F4 and E8 at odd roots of unity are constructed and explicitly computed for all the lens spaces.     

激光动态测量技术的研究

本文报导应用激光扫描，在Φ５ｍｍ至由６０ｍｍ的外径上，实现±０．０２ｍｍ动态测量精度的研究结果。文中对研究原理及精度分析作出简明阐述。     

Diffractive lens with binary phase levels to generate two focuses

ＤｉｆｆｒａｃｔｉｖｅｌｅｎｓｗｉｔｈｂｉｎａｒｙｐｈａｓｅｌｅｖｅｌｓｔｏｇｅｎｅｒａｔｅｔｗｏｆｏｃｕｓｅｓＬＯＮＧＰｉｎ；ＬＩＵＪｉｅ；ＳＨＩＷｅｎｍｉｎ；ＨＳＵＤａｈｓｉｕｎｇ（ＤｅｐａｒｔｍｅｎｆｏｆＡｐｐｌｉｅｄＳｃｉｅｎｃｅａｎｄＴｅｃ...     

用于高斯光束均匀化的非球面透镜系统分析与设计

提出一种用于高斯光束均匀化的透镜系统，论述这一系统实现高斯光束均匀化的基本原理，介绍系统的具体设计方法，并在具体参数下给出实际的加工曲线和光学结构。