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Related Experiment Video

Updated: May 9, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

[Study on phase correction method of spatial heterodyne spectrometer].

Xin-Qiang Wang¹, Song Ye, Li-Juan Zhang

¹Department of Electronic Engineering and Automation, Guilin University of Electronic Technology, Guilin 541004, China. xqwang2006@126.com

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu

|August 3, 2013

Summary

This summary is machine-generated.

This study presents an improved phase correction method for spatial heterodyne spectrometers to address interferogram distortions. The technique effectively eliminates false signals and enhances spectral accuracy, improving data quality in spectroscopic measurements.

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Area of Science:

Spectroscopy
Optical Engineering

Context:

Spatial heterodyne spectrometers (SHS) are susceptible to phase distortions in collected interferograms due to various measurement factors.
These distortions can compromise the accuracy and reliability of spectral data obtained from SHS instruments.

Purpose:

To introduce an improved phase correction method for spatial heterodyne spectrometers.
To mitigate phase distortions in interferograms and enhance spectral accuracy.

Summary:

The proposed method involves Fourier inverse transform to obtain a single-side transform spectrum and extract the phase curve.
Phase distortions are identified by fitting the phase slope, leading to the generation of phase correction functions.
Convolution of the transform spectrum with the correction function corrects spectral phase, validated on monochromatic and water vapor spectra.

Impact:

Effectively eliminates low-frequency false signals in monochromatic fringes, improving interferogram periodicity and symmetry.
Reduces the standard deviation of continuous spectrum phase error from 0.47 to 0.20, significantly enhancing spectral accuracy.
The improved phase correction method leads to more reliable and precise spectral measurements from SHS.