Presidential Young Investigators Award

我将进行光通信系统和相关支持技术的实验和理论研究。本计划涉及的主题将包括但不限于，以下具有代表性的领域：(A)相干光通信：这项工作将探讨通过先进的相干检测技术可实现的接收器灵敏度以及电和光带宽效率的极限。最初的研究将尝试演示使用单片半导体激光器进行零差检测，以及对四相移键控光学信号进行外差检测。(B)用于无线局域网的自由空间红外通信：这项研究将寻求开发利用自由空间红外传播进行高速数字通信的技术。初步研究将包括测量红外多径室内传播，以及分析和模拟各种调制解调技术的性能。在接下来的研究中，我希望演示使用该技术提供无线接入的工作高速局域网。(C)高性能光纤网络：这项工作将研究如何使用先进的光通信技术来构建比当今新兴网络的容量大三个数量级的网络。一项初步研究将解决多媒体联网的混合方法，将集中电子ATM交换与基于副载波或光频分多路复用的分布式电路交换相结合。(D)高性能数字系统中的光学互连：这项工作将探索光学互连在计算机等高性能数字系统中的应用。最初的研究课题将包括多芯片模块内的时钟分布和背板级别的数据通信。

I will perform experimental and theoretical studies of optical communication systems and of related supporting technologies. Topics to be addressed in this program will include, but will not be limited to, the following representative areas: (a) Coherent Optical Communications: this work will explore the limits of receiver sensitivity and of electrical and optical bandwidth efficiency that can be achieved through advanced coherent detection techniques. Initial studies will attempt to demonstrate homodyne detection using monolithic semiconductor lasers, as well as heterodyne detection of quadriphase-shift- keyed optical signals. (b) Free-Space Infrared Communications for Wireless Local-Area Networks: this research will seek to develop technologies for high-speed digital communication using free-space infrared propagation. Initial studies will include measurement of infrared multipath indoor propagation and analysis and simulation of the performance of various modulation and demodulation techniques. In following studies, I hope to demonstrate a working high-speed local-area network that provides wireless access using this technique. (c) High-Performance Optical-Fiber Networks: this work will investigate how advanced optical communication technology can be used to construct networks having capacities up to three orders of magnitude larger than the emerging networks of today. One initial study will address a hybrid approach to multimedia networking, combining lumped electronic ATM switching with distributed circuit switching based on subcarrier or optical-frequency-division multiplexing. (d) Optical Interconnects in High-Performance Digital Systems: This work will explore the application of optical interconnects to high- performance digital systems such as computers. Initial research topics will include clock distribution within multi-chip modules and data communication at the back-plane level.