It is shown that, in principle, there exists a light source giving a higher information rate per symbol in an optical communication channel than a single-mode laser. Such a source emits a definite number of photons per symbol. A possible form for this source is suggested, and the corresponding information rates are compared.
© 1976 Optical Society of America
L. Mandel, "Ideal light source for an optical communication channel," J. Opt. Soc. Am. 66, 968-970 (1976)