Real-time high-spectral-resolution mid-infrared spectroscopy with a signal-to-noise ratio of ten thousand
Posted on 21.09.2022 - 20:38
We developed a mid-infrared spectroscopy system with high spectral resolution and a high signal-to-noise ratio using an extremely high-order germanium immersion grating. The spectroscopic system covers wavelengths from 3 to 5 μm and has a spectral resolution of 1 GHz with a single-shot bandwidth of 2 THz. We proposed a method of improving the signal-to-noise ratio and achieved a ratio of over 3000 with a data acquisition rate of 125 Hz in the presence of fluctuations in the light source and environment. A signal-to-noise ratio of 10,000 was achieved with 0.1-s integration for 100-μW mid-infrared light.
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Tani, Shuntaro; Sugiyama, Kei; SUKEGAWA, TAKASHI; Sato, Tatsuro; ishizuka, yuya; Taya, Soichi; et al. (2022): Real-time high-spectral-resolution mid-infrared spectroscopy with a signal-to-noise ratio of ten thousand. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.6194095.v5
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