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The Concept Map you are trying to access has information related to:
lasers, charles h. townes, incoherent light, military had no use for it, atoms, cd players, albert eistein, focus photons in one direction, 1917, many uses, medicine, bell labs researcher, small to very large, lasers, not powerful enough, electronics, construction, surveying, military system, light amplification by stimulated emission of radiation, theory of stimulated emission, creates and amplifies a narrow, intense beam of coherent light, manufacturing, important, useless, consultant to bell labs , 1958, cutting metals, arthur l. schawlow, very complex, cutting and cauterizing of tissue, radiate their light in random directions , corrective eye surgery