Patent · US Expired

Optical fiber transmission link having passive, directionally dependent attenuation

US6941048B2 · kind B2 · utility

0Cited by

9References

6Claims

0Family size

Assignee

DEUTSCHE TELEKOM AG · DE

Inventors

Wolfgang Dultz · Frankfurt am Main, DE
Volker Maier · Euskirchen, DE
Jörg Happ · Bad Kötzting, DE
Werner Frank · Radolfzell, DE

Key dates

Filing date	Jan 24, 2001
Grant date	Sep 6, 2005
Priority date	—
Expiry date	Nov 29, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG02B6/3801
WIPO fieldOptics
WIPO sectorInstruments

Abstract

To provide directionally dependent attenuation for an optical information transmission link using simple means without the use of an active component, it is proposed to couple two optical waveguides (1, 2) having different core diameters to one another, the core diameter of the second fiber (2) being at least six times greater than the core diameter of the first fiber (1). In this manner, it is achieved that the conduction of light signals in a predefined direction is attenuated by at least the factor 30, while, on the other hand, the light propagating in the reverse direction, is attenuated very slightly.

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