Nonlinear interferometers for Fourier-transform infrared spectroscopy with visible light
| Autor: | Jens Kiessling, Chiara Lindner, Jachin Kunz, Sebastian Wolf, Frank Kühnemann |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
business.industry Lithium niobate Physics::Optics Infrared spectroscopy Interferometry chemistry.chemical_compound Optics chemistry Astronomical interferometer Spectral resolution Fourier transform infrared spectroscopy business Spectroscopy Astrophysics::Galaxy Astrophysics Visible spectrum |
| Zdroj: | Nonlinear Frequency Generation and Conversion: Materials and Devices XX. |
| DOI: | 10.1117/12.2578278 |
| Popis: | Nonlinear interferometers based on non-degenerate spontaneous parametric down-conversion (SPDC) create a link between separate spectral ranges. This allows for measurements in remote spectral regions while detecting light in easily accessible wavelengths. In our work, we use periodically poled lithium niobate to create correlated signal (visible or near-infrared) and idler (mid-infrared) photon pairs. Using a nonlinear interferometer in Michelson geometry, we obtain broadband mid-infrared spectra from light detected with a silicon avalanche photodiode. Combining the nonlinear interferometer with a measurement scheme in close analogy to classical Fourier-transform infrared spectroscopy allows for sub-wavenumber spectral resolution, which opens up possibilities for applications such as precise spectroscopic gas analysis. |
| Databáze: | OpenAIRE |
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