Planar dielectric waveguides in rotation are optical fibers: comparison with the classical model Peña-García, Antonio Pérez Ocón, Francisco De Asís Jiménez Cuesta, José Ramón Fiber optics Fiber characterization This paper was published in Optic Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.16.000927 A novel and simpler method to calculate the main parameters in fiber optics is presented. This method is based in a planar dielectric waveguide in rotation and, as an example, it is applied to calculate the turning points and the inner caustic in an optical fiber with a parabolic refractive index. It is shown that the solution found using this method agrees with the standard (and more complex) method, whose solutions for these points are also summarized in this paper. 2014-09-08T11:04:12Z 2014-09-08T11:04:12Z 2008 journal article Peña García, A.; Pérez-Ocón, F.; Jiménez, J.R. Planar dielectric waveguides in rotation are optical fibers: comparison with the classical model. Optic Express, 16(2): 927-936 (2008). [http://hdl.handle.net/10481/32941] 1094-4087 http://hdl.handle.net/10481/32941 10.1364/OE.16.000927 eng open access Optical Society of America