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Updated: Sep 23, 2025

Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
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Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing

Published on: March 22, 2019

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Highly efficient detection of near-infrared optical vortex modes with frequency upconversion

Yujia Wu, Haigang Liu, Xianfeng Chen

    Optics Letters
    |May 13, 2022
    PubMed
    Summary

    This study presents a novel frequency upconversion method to detect near-infrared vortex beams. This technique converts infrared light to visible light, enabling measurement of orbital angular momentum (OAM) using fringe patterns.

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