Integrated silicon based optical modulators : 100 Gb s and beyond Backgrounds Introduction to integrated optical modulators Optical circuits and waveguides in integrated Mach Zehnder optical modulators Electronic and optoelectronic properties of high speed phase shifters Oprtical electrical and electro optical characteristics of integrated silicon based optical modulators Transmission characteristics of integrated silicon based optical modulators Photonic electronic integration with silicon based optical modulators. This book discusses the principles and the latest progress of silicon optical modulators as cutting edge integrated photonic devices on silicon photonic platforms which play key roles in modern optical communications with low power consumption small footprints and low manufacturing costs. Silicon Mach Zehnder optical modulators are emphasized as the principal small footprint optical modulator because of its superior performance in high speed optical modulation at operational temperatures beyond 100 degrees Celsius without power consuming thermo electric cooling in spectral bands over 100 nm