Patent · US Expired

Method for producing gradient index refraction index profiles in polymer optical fibers

US6527985B1 · kind B1 · utility

4Cited by

3References

18Claims

0Family size

Assignee

DEUTSCHE TELEKOM AG · DE

Inventors

Werner Frank · Radolfzell, DE
Juergen Kaufhold · Dieburg, DE
Olaf Ziemann · Berlin, DE

Key dates

Filing date	Nov 20, 2000
Grant date	Mar 4, 2003
Priority date	—
Expiry date	Nov 20, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG02B1/045
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

In a method for producing graded-index profiles in polymeric optical fibers, ionizing radiation is used to cause an increase in the refractive index, for example in PMMA. Polymeric optical fibers, preforms or fiber-core preforms are irradiated with ionizing radiation of predetermined wavelength and dose while being moved past the radiation source in the longitudinal direction at a given speed and are subsequently tempered for a defined length of time. Through the control of the spatial distribution of the ionizing radiation with the aid of mirrors, lenses or aperture systems, a uniform, radial graded-index profile is produced over the entire fiber length, so that the polymeric fiber, used as an optical waveguide, has improved transmission characteristics for optical signals.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.