Feed-forward spectral calibration methodology for line-scanned tunable laser absorption spectroscopy

US11041803B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• William M. Green · Yorktown Heights, US
• Matthias Dittberner · Neustrelitz, DE
• Chi Xiong · Yorktown Heights, US
• Eric Zhang · Yonkers, US
• Gerard Wysocki · Princeton, US

Key dates

• Filing date: Mar 26, 2019
• Grant date: Jun 22, 2021
• Expiry date: Apr 17, 2039

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/06113
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A generalized feed-forward method for accurate tunable laser absorption spectroscopy includes generating a laser beam. The generated laser beam is directed down a reference path and a test/sample path. One or more parameters are extracted from the reference path. The one or more parameters, extracted from the reference path, are used as feed-forward, to adjust spectral analysis of the test/sample path to detect a composition and/or concentration of an analyte gas within the test/sample path. The extraction of the one or more parameters from the reference path and the spectral analysis of the test/sample path are performed substantially concurrently.