Fourier domain dynamic correction method for complex optical fringes in laser spectrometers

Teng, Cheyenne; Wysocki, Gerard; Zhang, Eric J.; Green, William M.

Title: Fourier domain dynamic correction method for complex optical fringes in laser spectrometers

Patent · Tue Aug 10 00:00:00 EDT 2021

OSTI ID:1840333

Teng, Cheyenne; Wysocki, Gerard; Zhang, Eric J.; Green, William M.

A method is provided for Fourier domain dynamic correction of optical fringes in a laser spectrometer. The method includes Fourier transforming a background spectrum contaminated with the optical fringes to obtain baseline fringes in a frequency domain. The method includes partitioning the baseline fringes in the frequency domain to obtain partitioned baseline fringes. The method includes reconstructing the partitioned baseline fringes as separate spectra. The method includes constructing a fitting model to approximate the background spectrum by assigning a first and a second free parameter to each of partitioned baseline fringe components to respectively allow for drift and amplitude adjustments during a fitting of the fitting model. The method includes applying the fitting model to a newly acquired spectrum to provide an interpretation of the newly acquired spectrum having a reduced influence of spectral contamination on concentration retrieval.

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Research Organization:: International Business Machines Corp., Armonk, NY (United States); Princeton Univ., NJ (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AR0000540

Assignee:: International Business Machines Corporation (Armonk, NY); The Trustees of Princeton University (Princeton, NJ)

Patent Number(s):: 11,085,826

Application Number:: 16/773,560

OSTI ID:: 1840333

Resource Relation:: Patent File Date: 01/27/2020

Country of Publication:: United States

Language:: English

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