Method and apparatus for performing spectrometric measurements

US11624707B2 · kind B2 · utility

Assignee

• ADVA Optical Networking SE · DE

Inventors

• Klaus Grobe · Planegg, DE
• Sander Jansen · Germering, DE

Key dates

• Filing date: Mar 23, 2021
• Grant date: Apr 11, 2023
• Expiry date: May 26, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/0612
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An apparatus adapted to perform spectrometric measurements, said apparatus comprising a tunable laser light source adapted to generate a laser light with an excitation wavelength supplied to an optical sensor which produces a sample specific response light signal; an optical reference filter adapted to measure laser light with the excitation wavelength fed back as a reference signal to provide wavelength calibration of the tunable laser light source; at least one optical measurement filter adapted to measure the sample specific response light signal produced by the optical sensor, wherein the optical reference filter and the at least one optical measurement filter are thermally coupled to maintain a constant wavelength relationship between the filter characteristics of the optical filters.