Diagnosis method and diagnosis chip for the determination of the bandwidth of optical fibers

US7659969B2 · kind B2 · utility

Assignee

• PHOENIX CONTACT GMBH & CO. KG · DE

Inventors

• Thorsten Behr · Bad Boll, DE
• Andreas Pape · Brakel, DE

Key dates

• Filing date: Mar 13, 2006
• Grant date: Feb 9, 2010
• Expiry date: Jul 13, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B10/07
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

For determination of the bandwidth of optical fibers, the invention proposes a method which comprises the injection of light at a first optical power level and at a first frequency into an optical fiber, as well as the measurement of a first signal level as a function of the optical power level of the light passing through the fiber at the first frequency, the injection of light at the second optical power level and at a second frequency into the optical fiber, the measurement of a second signal level as a function of the optical power level of the light passing through the fiber at the second frequency, and the determination of the bandwidth of the fiber as a function of the first and second optical power levels and/or of the measured first and second signal levels using a predetermined rule which describes the frequency-dependant attenuation response of the fiber.