This approach shows enhanced sensitivity in mid-infrared spectroscopy using an SU(1,1) interferometer, indicating potential for advanced applications.
We present mid-infrared spectroscopy with undetected photons in an SU(1,1) interferometer based on a second-order dispersion-engineered, ultra-broadband, non-degenerate integrated parametric down-conversion source.
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Gnanavel et al. (2025) studied this question.
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