AI Article Synopsis
- A flat waveguide for mid-infrared was created by co-extruding two different silver halide crystals.
- The study involved using a Fourier Transform Spectrometer to analyze the waveguide's transmission and modal behavior, determining the cut-off wavelength.
- The findings indicate that the waveguide exhibits single-mode behavior for wavelengths longer than 8.83 micrometers, making it suitable for specific applications like modal filtering in mid-infrared astronomical interferometers.
Article Abstract
A flat waveguide for the middle infrared was made by co-extrusion of two silver halide crystals of different chemical compositions. The transmission of the waveguide and its modal behavior was studied using a Fourier Transform Spectrometer and a dedicated optical bench. Analyzing this spectrum, we were able to obtain the cut-off wavelength of the waveguide. We observed a single mode behavior for wavelengths longer than 8.83mum, in good agreement with the theoretically expected values. This novel procedure is ideal for tailoring the properties of the waveguide for specific applications, in particular the spectral range where it exhibits a single-mode behavior. It can thus be applied to achieve modal filtering for mid-IR astronomical interferometers (e.g. beam combiners, nullers, etc.).
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| http://dx.doi.org/10.1364/oe.17.012516 | DOI Listing |
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