采用分立光器件技术，设计了一种基于四光纤准直器和介质薄膜滤波片的新型可重构光分插复用器，该器件的输入、下路、上路和输出四个端口位于可重构光分插复用器的同一侧。利用 Optisystem软件，对所设计的 ROADM器件的性能及其在联网条件下的误码率和眼图进行了仿真测试。仿真结果显示：该器件的光功率损耗为 2 dB，各信道增益基本均衡；联网条件下，在传输距离为 75 km、传输速率为 2.5 Gb/s的系统中，误码率小于 10-9， Q因子大于 6，眼图清晰。该器件可以满足城域网中的传输需求。
光分插复用器 四光纤准直器 介质薄膜滤波片 误码率 眼图 optical add/drop multiplexer four-fiber collimator thin film filter bit error rate eye diagram
乐孜纯 1,2,3董文 1,2,3刘魏 1,2,3张明 1,2,3[ ... ]黄万霞 1,2,3
1 浙江工业大学理学院，浙江 杭州 310023
2 中国科学院长春光学精密机械与物理研究所， 吉林 长春 130033
3 中国科学院高能物理研究所， 北京 100080
结合矩阵光学方法与衍射理论，得到研究X射线长组合折射透镜光学性能（包括焦斑尺寸、有效光束半径和强度增益等）的理论方法。设计并采用LIGA技术实际制作了顶点曲率半径50 μm的抛物面型PMMA材料长X射线组合折射透镜，在北京同步辐射装置（BSRF）的形貌站（4 W，1 A）对其在8 keV时的聚焦性能进行了实际测试。给出了模拟计算和实测结果，并进行了分析讨论，实测结果显示了良好的聚焦效果，理论与实验结果基本吻合。
光学器件 X射线长组合折射透镜 薄透镜近似 X射线聚焦性能 同步辐射
Author Affiliations
Abstract
1 College of Information Engineering, Zhejiang University of Technology, Hangzhou 310032
2 State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022
A method based on Fourier spectrum analysis for predicting the performances of the X-ray compound lenses is briefly introduced, the theoretical result obtained is the same as that of Fresnel-Kirchhoff approach. A kind of technique named moulding is developed for fabricating the one-dimensional (1D) compound X-ray lens with Al material and the fabrication process is presented. In addition, a two-time coating method is used to improve the numerical apertures of the compound lenses. Furthermore, the focusing performance of the Al compound X-ray lens under the high energy X-rays is measured.
340.0340 X-ray optics 070.2590 Fourier transforms 220.4000 Microstructure fabrication Chinese Optics Letters
2006, 4(9): 556
Author Affiliations
Abstract
1 College of Information Engineering, Zhejiang University of Technology, Hangzhou 310032
2 State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022
3 Department of Mechanical Engineering, Changchun Institute of Technology, Changchun 130020
A theoretical method based on the diffractive theory is used for predicting three-dimensional (3D) focusing performances of the compound X-rays refractive lenses (CRLs). However, the derivation of the 3D intensity distribution near focus for the X-ray refractive lenses is quite complicated. In this paper, we introduce a simple theoretical method that is based on the first and second moments in the theory of probability. As an example, the 3D focusing performance of a CRL with Si material is predicted. Moreover, the results are compared with those obtained by the diffractive theory. It is shown that the method introduced in this paper is accurate enough.
340.0340 X-ray optics 260.1960 diffraction theory 110.0110 imaging systems Chinese Optics Letters
2005, 3(10): 10618
Author Affiliations
Abstract
1 College of Information Engineering, Zhejiang University of Technology, Hangzhou 310014
2 State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022
It is important to predict the intensity distribution in focusing plane for designing the X-ray compound refractive lenses. On the basis of analyzing the structure of X-ray compound lenses and comparing it with Fraunhofer diffraction system, it is concluded that the X-ray focusing system can be regarded as a kind of Fraunhofer diffraction system. Therefore, a method based on Fourier spectrum analysis is presented to predict the intensity distribution in the focusing plane for the X-ray lenses. A brief analysis on the relationship between the parameters of X-ray lenses and their focusing performance is also given in this paper.
340.0340 X-ray optics 070.2590 Fourier transforms 050.1220 apertures Chinese Optics Letters
2004, 2(6): 06367
