Otdr-Verfahren zur Erkennung von Hohlkernfasern

Details

Veröffentlichungs-Nr.

EP4718049

Anmeldetag

23. September 2025

Veröffentlichung

1. April 2026

Rechtsraum

EP

IPC

G01M11/00

Abstract

A method of locating a hollow-core fiber segment amongst silica core segments in optical fiber link is provided. An OTDR test instrument sends test signals along the fiber link and a Rayleigh backscatter level as a function of distance along the optical fiber link of returning signals is measured. The position of the proximal extremity of the hollow-core optical fiber segment is identified by locating a discrete drop greater than a drop threshold value in the Rayleigh backscatter level. The position of the distal extremity of the hollow-core fiber segment is identified by locating one of a discrete step greater than a step threshold value in the Rayleigh backscatter level and end-of-fiber indicator. The drop threshold value and the step threshold value are commensurate with a difference between a Rayleigh backscatter level in hollow-core optical fibers and in the type of silica core optical fibers of the optical fiber link.

Anmelder

Firma

EXFO Inc.

Land

🇨🇦 Kanada