This book is all about integrated ring resonators made out of optical waveguides in various materials for di?erent applications. Integrated ring resonators are used to build optical ?lters, lasers, sensors, modulators, d- persion compensators, just to name a few. The book covers the range from simulationofvariousringresonatorcon?gurationstothefabricationprocesses currently used, to the description of the application of integrated ring re- nator in various ?elds. The book presents a summary of the activities in this ?eld form the past to the current state of the art giving several examples....