Research Equipment: A Phase and Amplitude Noise Measurement System

罗切斯特理工学院的电气工程系将购买一套相位和振幅测量系统，专门用于支持工程研究。 这些设备将用于几个研究项目，特别是： 1.“A Novel FM Microwave Fiber-Optic Link for Antenna Remoting and 相控阵列 2.“一种基于激光器的超宽带微波光纤发射器 短外腔二极管” 3.“全光SCM和WDM-SCM多路接入网络”这些研究项目的关键创新在于利用非线性光学系统的“不稳定性”在光载波上生成微波/毫米波子载波。 具体地，微波/毫米波子载波是使用光学电流控制振荡器（CCO）全光学地生成的，该光学电流控制振荡器系统地利用固有的非线性动力学，主要是周期性轨道的形成。 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操作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战略。 最终，低噪声光CCO将被插入微波光纤链路以及SCM和WDM-SCM多路访问光纤网络。 ***

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. ***