机载相机非球面光学系统热光学特性分析

环境温度是影响非球面光学系统成像质量的主要因素之一,采用热光学特性分析方法,对某机载相机非球面光学系统进行热光学特性分析,通过有限元法分析相机光学系统结构热变形,并去除镜面表面刚体位移,将面型数据输入光学软件程序进行Zernike多项式拟合,将拟合结果导入光学设计软件中,对非球面光学系统成像进行性能评价。分析结果表明:热光学特性分析方法可以有效地对非球面光学系统的实际工作环境进行仿真,预测环境温度对光学系统成像质量的影响,对光学系统设计具有指导意义。     

靶场光学测量中的变焦距光学系统

变焦距光学系统通过调整光学系统参数,改变光学系统的焦距来保证光学系统动态成像的需求。本文从变焦距光学系统的基本原理出发,简单描述了光学补偿与机械补偿变焦光学系统的设计,阐述了常见变焦距光学系统的类型与结构。指出了传统变焦距光学系统存在的问题,结合DSP和步进电机在变焦距光学系统中的最新应用,概述了靶场光测设备的变焦距光学系统的最新动态,分析了电机直传技术在靶场光测设备应用的可行性,意在为新一代数字变焦光学系统提供理论参考。     

Generation of Circular Optical Vortex Array

We report on a novel optical vortex array named circular optical vortex array, which is generated by the superposition of two concentric perfect optical vortices. The circular optical vortex array has a constant topological charge of +1 or ?1, the number and sign of which are determined by the topological charges of the two perfect optical vortices. Moreover, the radius of the circular optical vortex array is easily adjusted by using the cone angle of an axicon. Furthermore, the circular optical vortex array and multiple circular optical vortex array can be rotated by changing the initial phase difference of the perfect optical vortices on demand. This work demonstrates a complex structured optical field, which is of significance for applications such as optical tweezers, micro‐particle manipulation, and optical imaging.     

A novel all-optical label processing based on multiple optical orthogonal codes sequences for optical packet switching networks

This paper proposes an all-optical label processing scheme that uses the multiple optical orthogonal codes sequences (MOOCS)-based optical label for optical packet switching (OPS) (MOOCS-OPS) networks. In this scheme, each MOOCS is a permutation or combination of the multiple optical orthogonal codes (MOOC) selected from the multiple-groups optical orthogonal codes (MGOOC). Following a comparison of different optical label processing (OLP) schemes, the principles of MOOCS-OPS network are given and analyzed. Firstly, theoretical analyses are used to prove that MOOCS is able to greatly enlarge the number of available optical labels when compared to the previous single optical orthogonal code (SOOC) for OPS (SOOC-OPS) network. Then, the key units of the MOOCS-based optical label packets, including optical packet generation, optical label erasing, optical label extraction and optical label rewriting etc., are given and studied. These results are used to verify that the proposed MOOCS-OPS scheme is feasible.     

光分组交换网络中多组光正交码组合光标签识别处理及实验

报道了光分组交换网络中基于多组光正交码组合光标签的识别与接收实验,光标签采用了码长为19,码重为3的2组光正交码组合光标签方案.给出了基于多组光正交码光标签的光分组交换网络(MOOC-OPS)基本原理,通过分析指出在MOOC-OPS网络中处理多组在时域上非连续、随机、突发光标签是现实MOOC-OPS关键技术之一.设计出了基于展宽网络和放大器级联方式接收多组低功率窄脉冲(MOOC-OPS网络的光标签)的实验方案,完成了实验电路板制作与实验验证.实验结果表明成功地实现了MOOC-OPS网络中周期为2ns基于多组光正交码光标签脉冲的识别接收,验证了该方案的可行性.     

靶场光学测量中的变焦距光学系统

变焦距光学系统通过调整光学系统参数,改变光学系统的焦距来保证光学系统动态成像的需求。本文从变焦距光学系统的基本原理出发,简单描述了光学补偿与机械补偿变焦光学系统的设计,阐述了常见变焦距光学系统的类型与结构。指出了传统变焦距光学系统存在的问题,结合DSP和步进电机在变焦距光学系统中的最新应用,概述了靶场光测设备的变焦距光学系统的最新动态,分析了电机直传技术在靶场光测设备应用的可行性,意在为新一代数字变焦光学系统提供理论参考。     

InGaAsP/InP evanescent mode waveguide optical isolators and their application to InGaAsP/InP/Si hybrid evanescent optical isolators

We theoretically investigated InGaAsP/InP evanescent mode waveguide optical isolators and proposed their application to InGaAsP/InP/Si hybrid evanescent optical isolators. InGaAsP/InP evanescent optical isolators are composed of semiconductor optical amplifier (SOA) waveguides having InGaAsP multiple quantum well (MQW) active layer and upper InGaAsP waveguide layer with ferromagnetic layer. Optical isolation is obtained for evanescent optical mode in the InGaAsP waveguide layer. InGaAsP/InP/Si hybrid evanescent optical isolators are theoretically proposed based on the idea of InGaAsP/InP evanescent optical isolators. InGaAsP/InP/Si hybrid evanescent optical isolators are composed of ferromagnetic metal loaded silicon evanescent waveguides with wafer-bonded InGaAsP/InP optical gain material. The optical isolation and propagation loss are discussed with the structure of silicon evanescent waveguides, and optical isolation of 8.0 dB/mm was estimated. The concept of semiconductor evanescent mode optical isolators is feasible with InP based photonic integrated circuits and advanced silicon photonics.     

C_(60)-TTF及Ru-oligothienylacetylide复合物的设计合成:新型非线性光诱导效应纳米材料(英文)

Nonlinear optics has been the subject of intensive research because of its wide applications in field of photonics, nanophotonics[1] and optoelectroncs such as optical signal processing, broad-band optical communications, integrated optics, optical sensing, optical poling, optical limiting, optical computing etc.     

长、短周期光纤光栅退火实验研究

光纤光栅技术是光纤通信领域继光纤放大器之后的一个里程碑 ,由此产生的全光纤光子线路及其集成将对光纤通信的发展产生巨大的推动作用。获得性能稳定的光纤光栅具有重要的意义。介绍了长、短周期光纤光栅的光学特性及退火特性     

新型光学材料发展综述

新型光学材料是指光电数码及信息产品所应用的技术含量高、制作难度大、光学性能优越的光学材料,一般是指镧系光学玻璃、环保系列光学玻璃、低熔点及磷酸盐光学玻璃等。目前我国光学材料的研究开发水平与国外发达国家相比还有一定的差距,特别是与日本和德国等国际知名光学材料生产厂家相比,无论从光学玻璃品种还是生产工艺及设备都存在着明显的差距。目前我国光学材料行业仍以生产传统的光学玻璃为主,一些新型材料需从国外进口,不能完全满足我国高科技发展的需要。在光学材料方面,我国急待需要进行技术研究和技术创新工作,即开发新型的光学材料,研究先进的制造工艺以及测试技术,尽快形成我国的产业化规模生产。