We summarize the history and discuss quantum subtleties of maser/laser physics from early days until the present.
DOI:https://doi.org/10.1103/RevModPhys.71.S263
©1999 American Physical Society
W. E. Lamb
W. P. Schleich
M. O. Scully
C. H. Townes
Vol. 71, Iss. 2 — March - May 1999
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