This book is to acquaint the reader with various theoretical and experimental studies of various topics of interest in "Renewable Energy and Pollution Control" , and further enable him to choose the topic of research based on his interest and understanding. The choice of the topics has been made by the authors on the basis of their theoretical and experimental background and various interactions with scientists and academicians, while working in DRDO labs (like LASTEC, IRDE, and GTRE), IIT, Delhi, and foreign labs in France, Austria, Switzerland, and Italy. Various important topics including Phosphate Glasses and Fiber Optics Amplifiers for Applications in Renewable Energy , X-ray free electron lasers for Pollution control , use of Optical Thyristors in Energy storage, and Closed Loop Technologies in Renewable energy have been discussed. The book should be quite useful for the students, researchers, and the technologists engaged in this fascinating field of Renewable Energy and Pollution Control by using Lasers and the related devices.