Chapter 1. Concepts and fundamental theories of optical fiber dispersions.- Chapter 2. Single mode optical fiber dispersions and physics phenomenon involved.- Chapter 3. Study of optical fiber dispersion and measuring methods.- Chapter 4. Design and development of algorithm for auto-measurement voltage and temporal parameters of microwave signal.- Chapter 5. Device characterizations and chromatic dispersion measurement in optical fibers.- Chapter 6. Optical fiber dispersions and future contributions on electro-optic modulator system optimizations.