This book grew out of a 2-semester graduate course in laser physics and quan-tum optics. It requires a solid understanding of elementary electromagnetismas well as at least one, but preferably two, semesters of quantum mechanics.This book grew out of a 2-semester graduate course in laser physics and quan-tum optics. It requires a solid understanding of elementary electromagnetismas well as at least one, but preferably two, semesters of quantum mechanics.