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Light sources

MAY 01, 1976
Light‐emitting diodes are simpler to construct, while heterojunction lasers produce lower dispersion and couple to fibers more efficiently; both types have now been operating for well over one year.

DOI: 10.1063/1.3023470

Henry Kressel
Ivan Ladany
Michael Ettenberg
Harry Lockwood

The selection of a system for optical communications is largely governed by the availability of the necessary components. Although through‐the‐atmosphere systems have some applicability, they are generally restricted to small installations where their inherent limitations are tolerable. The optical transmission medium of greater importance for the future is a glass or plastic fiber, and therefore the properties of these fibers—their absorption, dispersion, mechanical strength, and so on—are all‐important.

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More about the Authors

Henry Kressel. David Sarnoff Research Center, RCA Laboratories.

Ivan Ladany. David Sarnoff Research Center, RCA Laboratories.

Michael Ettenberg. David Sarnoff Research Center, RCA Laboratories.

Harry Lockwood. David Sarnoff Research Center, RCA Laboratories.

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Volume 29, Number 5

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