Mid-wavelength infrared (MWIR) as one of the most important transparent atmosphere windows is less sensitive to interference from the background emission of the sun, providing a high-transmission zone for the finger-print spectra of various materials and enabling the communication channels between space and ground. Fundamental characteristics of photons, wavelength, polarization and their measurements are of great interest in almost all areas of science and in remote sensing technology. However, the crosstalk among various polarization and wavelength channels prevents accurate mid-infrared detections at high signal-to-noise ratio.
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Source: Phys.org