Lasers

A concise, accessible guide explains electromagnetic radiation and how coherent, monochromatic light is produced by stimulated emission and population inversion, then outlines how practical lasers are constructed. It describes major classes of lasers and important operational issues such as power, efficiency, and beam control. The text surveys applications ranging from holography and communications to precision machining, microscopy, and medical procedures. It also discusses technical challenges and the engineering advances that have enabled movement from laboratory demonstrations to commercial and industrial devices. The work closes by considering likely future uses and suggests further reading for deeper study.