Transmission of light by fibers for optical communication. On the Nobel Prize in Physics awarded to Charles Kuen Kao, Willard S. Boyle, and George E. Smith (I) Autors/ores Santiago Vallmitjana Resum The Nobel Prize in Physics 2009 was divided, one half awarded to Charles Kuen Kao for innovative achievements concerning the transmission of light in fibers for optical communications (the other half was jointly awarded to Willard S. Boyle and George E. Smith). This article describes the scientific and technological background of the 1960s, and how, in 1966, from a publication from Kuen Kao, great expectations were made regarding the possibility of sending information with a laser through optical fibers. The basic functioning of optical fibers and their related technology is described, as well as the various difficulties that were overcome during the following years in order to attain reliable communication systems, such as the ones today. Descàrregues PDF (English) Publicat 2012-06-28 Número Vol. 7 Núm. 2 (2011) Secció The Nobel Prizes of 2009 Llicència This work, including photographs and other illustrations, unless the contrary is indicated, is subject to an Attributions–Non-Commercial–No Derivative Works 3.0 Creative Commons License, the full text of which can be consulted at http://creativecommons.org/licenses/by-nc-sa/3.0/. You are free to share, copy, distribute and transmit the work provided that the author is credited and reuse of the material is restricted to non-commercial purposes only and that no derivative works are created from the original material.