Wavelength measurement adjustment

US6798522B2 · kind B2 · utility

Assignee

• AGILENT TECHNOLOGIES, INC. · US

Inventors

• Ralf-Henning Stolte · Hamburg, DE
• Peter Thoma · Mannheim, DE
• Emmerich Mueller · Aidlingen, DE

Key dates

• Filing date: Aug 3, 2001
• Grant date: Sep 28, 2004
• Expiry date: Dec 14, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J2003/2866
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A wavelength-determining unit for determining the wavelengths of a plurality of successive optical signals &lgr;(t) includes a wavemeter unit for determining first wavelength values &lgr;1(t) for the optical signals &lgr;(t). An absolute-measuring unit having unambiguous wavelength properties at known absolute wavelength values determines second wavelength values &lgr;2(t) as such of the known absolute wavelength values covered by the optical signals &lgr;(t). An evaluation unit receives the determined first &lgr;1(t) and second &lgr;2(t) wavelength values and provides forcorrected wavelength values &lgr;1′(t) based on a comparison of the determined first &lgr;1(t) and second &lgr;2(t) wavelength values.