# Spectral Super-Resolution Technology Based on Fabry–Perot Interferometer for Temporally and Spatially Modulated Fourier Transform Imaging Spectrometer

## TL;DR

This paper introduces a new method to enhance spectral resolution in imaging spectrometers by combining two technologies, improving resolution and system efficiency.

## Contribution

The novel approach combines FPI and TSMFTIS to overcome OPD limitations and achieve twofold spectral resolution improvement.

## Key findings

- The method achieves multi-component joint interference imaging with improved spectral resolution.
- FPI optical defects were studied, and targeted improvement algorithms were proposed.
- The technique offers high throughput, stability, and low cost for spectral imaging.

## Abstract

A new spectral super-resolution technique was proposed by combining the Fabry–Perot interferometer (FPI) with Temporally and Spatially Modulated Fourier Transform Imaging Spectrometer (TSMFTIS). This study uses the multi-beam interference of the FPI to modulate the target spectrum periodically, and it acquires the modulated interferogram through TSMFTIS. The combined interference of the two techniques overcomes the limitations of the maximum optical path difference (OPD) on spectral resolution. FPI is used to encode high-frequency interference information into low-frequency interference information, proposing an inversion algorithm to recover high-frequency information, studying the impact of FPI optical defects on the system, and proposing targeted improvement algorithms. The simulation results indicate that this method can achieve multi-component joint interference imaging, improving spectral resolution by twofold. This technology offers advantages such as high throughput, stability, simple and compact structure, straightforward principles, high robustness, and low cost. It provides new insights into TSMFTIS spectral super-resolution research.