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Spectrum estimation from truncated, non-linearly phase shifted or irregularly sampled interferograms.
Optics Express
|May 15, 2020
Summary
Recording only part of an interferogram in spectrometers can affect spectral results. This study analyzes the impact of partial interferogram recording and other errors like irregular sampling on spectral data quality.
Area of Science:
- Spectroscopy
- Optical Engineering
Background:
- Spectrometers often record partial interferograms for performance.
- This can introduce artifacts and errors in the resulting spectrum.
- Understanding these effects is crucial for accurate spectral analysis.
Purpose of the Study:
- To investigate the impact of partial interferogram recording on spectral data.
- To analyze additional error sources in spectrometers, including irregular sampling and non-linear phase.
- To improve the classical spectral data processing chain.
Main Methods:
- Analysis of spectral data derived from partial interferograms.
- Modeling of errors from irregular sampling and non-linear phase.
- Revisiting and refining the standard spectrometer data processing algorithms.
Main Results:
- Partial interferogram recording leads to specific spectral distortions.
- Irregular sampling and non-linear phase introduce further spectral artifacts.
- An improved processing chain mitigates these errors effectively.
Conclusions:
- Partial interferogram recording necessitates careful data processing.
- Addressing sampling and phase errors is vital for accurate spectrometer performance.
- The enhanced processing chain offers improved spectral fidelity.
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