Proceedings of the Fourth Weber Research Institute (WRI) International Symposium on [title], held in Brooklyn New York, October 1994. The aim of the symposium was to examine guided-wave phenomena and related aspects of optoelectronics, and to review state-of-the-art techniques for solving electromagnetic problems that arise in that field. The proceedings specifically address characterization and modeling methods that are most relevant to the analysis and design of optoelectronic devices. The focus is on composite devices employing guided-wave components that connect multiple optical and/or electronic elements in hybrid, integrated, or other forms. Basic theory, analytical and numerical methods are stressed rather than fabrication and experimental techniques. Annotation c. by Book News, Inc., Portland, Or.