This book is a teaching book for advanced undergraduate and/or postgraduate levels. Its primary goal is to link some contemporary applications in chemistry, biology and medicine to known photophysical principles and laser properties. Chapters 1-3 highlight the basic photochemical and photophysical principles associated with electronic states together with a survey of laser systems, timing, and related devices. The following chapters include several techniques and applications in the fields of chemistry, biology and medicine that are based on these basic principles. This approach provides a...