Focusing light though scattering media beyond the ballistic regime is a challenging task in biomedical optical imaging. This challenge can be overcome by wavefront shaping technique, in which a time-reversed (TR) wavefront of scattered light is generated to suppress the scattering. In previous TR optical focusing experiments, a phase-only spatial light modulator (SLM) has been typically used to control the wavefront of incident light. Unfortunately, although the phase information is reconstructed by the phase-only SLM, the amplitude information is lost, resulting in decreased peak-to-background ratio (PBR) of optical focusing in the TR wavefront reconstruction. A new method of TR optical focusing through scattering media is proposed here, which numerically reconstructs the full phase and amplitude of a simulated scattered light field by using a single phase-only SLM. Simulation results and the proposed optical setup show that the timereversal of a fully developed speckle field can be digitally implemented with both phase and amplitude recovery, affording a way to improve the performance of light focusing through scattering media.

We present a high dense views auto-stereoscopic three-dimensional display method with the projectors array and lenticular lens array (LLA) screen. The principle and configuration are demonstrated. This display method utilizes lenticular screen to modulate the information of projectors. To increase the dense of views, we propose a novel arrangement way of projectors array. In the experiment, the viewer can obtain smooth motion parallax and evident stereo feeling at optimal distance. Through analyzing and observation, the maximum display depth is found to be more than 50 cm.

The resolution of the parallax image is inversely proportional to the view number in the horizontal direction for the traditional autostereoscopic display based on a parallax barrier. To balance the resolution in the vertical and horizontal directions, two parallax interleaved barriers are designed. The liquid crystal display panel provides the synthetic image with square pixel units, and the pixels in a unit are distributed to different horizontal views. Two parallax interleaved barriers work together to modulate pixels in vertical and horizontal directions. 3D display with uniform resolution and low crosstalk is demonstrated.

An auto-stereoscopic three-dimensional (3D) display method with the narrow structure pitch and high dense viewpoints is presented. Normally, the number of views is proportional to the structure pitch of the lenticular lens array. Increasing the density of views will decrease the spatial display resolution. Here a lenticular lens array with one pitch covering 5.333 subpiexels and a novel subpixel arrangement method are designed, and a 32 view 3D display is demonstrated. Compared with the traditional 6-view 3D display, the angular resolution and the displayed depth of field are significantly improved.

提出了利用二维彩色图像和深度图生产计算菲涅耳全息图的方法。把二维彩色图像按深度图分为多层物面信息，并把每层物面深度值转换为菲涅耳衍射距离。根据层析法原理，采用单步菲涅耳衍射算法，即可得到三维场景的计算全息图。研究结果显示该方法可以正确地对复杂三维场景进行全息图的记录和再现。利用强度叠加法对再现像进行散斑去除，提高了再现三维图的质量。

为了实现自然的三维显示，需要按照真实物体呈现方式同时具有双目视差和平滑的运动视差。增加视点数量并提供平滑运动视差通常需要大量的空间信息，依靠大量的数据信息最终可以实现模拟真实场景效果的目的。全息立体图可用于显示三维离散图像或一组三维的空间数据，具有良好的观测效果。给出了三种实现平滑运动视差的三维显示方法，显示效果等同于全息立体图。基于液晶显示屏生成的数字蒙版与高精度柱镜阵列，实验实现了56°角内1200个视点连续的三维显示。在50.7 cm×28.5 cm的显示屏幕上实现超过40 cm的景深。利用尺寸为1.3 m×1.8 m的全息功能屏幕、视频服务器、相机投影机阵列，可以实现高连续性三维场景再现，深度超过1 m。利用分辨率为3840 pixel×2160 pixel的50 inch(1 inch=2.54 cm)液晶显示面板生成的数字断层图像实现了具有连贯运动视差的三维显示。

A novel approach is used to implement optical carrier suppression and separation (OCSS) labeling. Then, the performance of 10/40-Gb/s duobinary payload with 2.5-Gb/s amplitude shift keying (ASK) or duobinary label by numerical simulations is studied. Influencing factors, such as demultiplexer bandwidth and fiber Bragg grating (FBG) filter bandwidth, are investigated. Simulation result shows that the received sensitivity of ASK label is higher than that of the duobinary label, while the received sensitivity of duobinary payload with duobinary label is higher than that with ASK label.

在半导体激光器实现波长转换的理论模型中引入互耦合系数, 根据改进后的波长转换模型, 得出了波长转换的误码率特性与理论模型中的互耦合系数的关系, 并进行了数值模拟和实验验证。数值模拟结果表明, 互耦合系数的大小取决于信号光和探测光功率及其波长间隔, 互耦合系数越大, 波长变换的误码率越小。理论与实验结果表明, 只有在大的信号光功率、小的探测光功率和较小波长间隔情况下, 即当互耦合系数取值较大时, 波长转换的误码率才能达到最小, 信号光功率的减小及探测光功率的偏大均会增大系统的误码率。

分析了高非线性光子晶体光纤(HNL-PCF)中拉曼孤子自频移(SSFS)的原理。讨论了HNL-PCF中SSFS效应在波长变换、飞秒孤子脉冲、超快数模转换和改善通信的稳定性等方面的应用。随着PCF技术的发展和对SSFS研究的深入，基于PCF中SSFS的各种器件将在未来的光纤通信系统中发挥重要的作用。

文章研究了网际协议/多协议标签交换(IP/MPLS)网络升级为通用多协议标签交换(GMPLS)网络的过程中存在的几种演进模型，并重点分析了岛式模型。同时，还分析了MPLS网络和GMPLS网络互联时存在的问题、两种协议间的差异以及解决这些问题所采用的路由、信令和通道计算技术。