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Written with the second year engineering students of undergraduate level in mind, this well set out textbook explains the fundamentals of laser systems and its applications in various fields. Written in question –answer form, the book is precise and easy tounderstand. Firstly, the book covers … • Elementary Quantum Physics-Schrodinger equation, concept of coherence, absorption, • Spontaneous emission and stimulated emission, relation between Einstein's A and Bcoefficients, population inversion, pumping, gain and optical cavities, • Lasers Laser Systems- Main components of Lasers, principles of Laser action,Lasers and types, three and four level Lasers, CW and Pulsed Lasers,atomic,ionic,molecular, excimers, liquid and solid state Lasers and systems ,short pulse generation and measurement • Applications-Laser application in in medicine and surgery, material processing, optical communication, metrology and LIDAR,military uses and holography