CAREER: All-Optical SCM and WDM-SCM Multi-Access Networks Based on Optical Current-Controlled Oscillators

9622298 Li罗切斯特理工学院电机系将购买一套用于支持工程研究的相位和幅度测量系统。该设备将用于几个研究项目，特别包括：1.一种用于天线遥测和相控阵的新型调频微波光纤链路。基于短腔激光二极管的超宽带微波光纤发射机“全光SCM和WDM-SCM多接入网络”这些研究项目分享了一项关键创新，即利用非线性光学系统的“不稳定性”在光载波上产生微波/毫米波副载波。具体地说，微波/毫米波副载波是使用光学电流控制振荡器(CCO)光学产生的，该振荡器系统地利用固有的非线性动力学，主要是周期轨道的形成。副载波的相位和幅度噪声在很大程度上决定了模拟(数字)链路或通信网络的信噪比(误码率)。所要求的设备将与理论研究结合使用，以确定作为设备参数和运行条件的函数的幅度和相位噪声的依赖性。随后，将制定减少这些噪音的策略。最终，低噪声光纤CCO将被插入微波光纤链路以及SCM和WDM-SCM多路接入光纤网络中。***

9622298 Li The Department of Electrical Engineering at Rochester Institute of Technology will purchase a phase and amplitude measurement systems which will be dedicated to support research in engineering. The equipment will be used for several research projects, including in particular: 1. "A Novel FM Microwave Fiber-Optic Link for Antenna Remoting and Phased Arrays' 2. "An Ultra Wideband Microwave Fiber-Optic Transmitter Based on Laser Diodes with Short External Cavity" 3. "All-Optical SCM and WDM-SCM Multi-Access Networks" These research projects share a key innovation in generating microwave/millimeter-wave subcarriers on an optical carrier exploiting "instabilities" of nonlinear optical systems. Specifically, the microwave/millimeter-wave subcarriers are generated all optically using the optical current controlled oscillator (CCO) which systematically exploits inherent nonlinear dynamics, mainly the formation of periodic orbits. The phase and amplitude noise of the subcarrier determines, to a large extent, the signal-to-noise ratio (bit-error rate) of the analog (digital) links or communication networks. The equipment requested will be used in combination with theoretical investigations to determine the dependence of the amplitude and phase noise as functions of device parameters and operating conditions. Subsequently strategies for reducing these noises will be formulated. Ultimately, low-noise optical CCO's will be inserted in microwave fiber-optic links as well as SCM and WDM-SCM multi-access fiber-optic networks. ***