PAUL G STEPHAN
Engineers in Landenberg, PA
License number
Pennsylvania PE000739K
Category
Engineers
Type
Professional Engineer
Address
Address
Landenberg, PA 19350
Professional information
Process For Low Attenuation Methacrylate Optical Fiber
US Patent:
4161500, Jul 17, 1979
Filed:
Oct 14, 1977
Appl. No.:
5/842166
Inventors:
Henry M. Schleinitz - Kennett Square PA
Paul G. Stephan - Landenberg PA
Paul G. Stephan - Landenberg PA
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
D02G 300, B32B 2700
US Classification:
264 1
Abstract:
Low attenuation, all-plastic optical fiber is made by using starting materials which are rigorously purified to remove light-absorbing impurities and solid particles of dirt, polymerizing the core monomer under pressure with a heating schedule which leads to at least 98% conversion to polymer as a cylindrical preform, and ram extruding the core of the optical fiber while melting only the forward end of the preform of core polymer so as to preclude contamination of the core by dirt or formation of bubbles by polymer degradation. Optical fibers so made exhibit light attenuations as low as 300 dB/km or lower.