M-lines characterization of selenide and telluride waveguides for mid-infrared interferometry

Details M-lines characterization of selenide and telluride waveguides for mid-infrared interferometry M-lines characterization of selenide and telluride waveguides for mid-infrared interferometry

2006-08-09

arxiv.org/abs/astro-ph/0608198v1

Astronomy and Astrophysics

Astrophysics

accepted in OSA Optics Express, 11 pages, 4 figures

Scientific paper

10.1364/OE.14.008459

Nulling interferometry is an astronomical technique that combines equal wavefronts to achieve a deep rejection ratio of an on-axis star, and that could permit to detect Earth-like planets in the mid-infrared band 5 -- 20 microns. Similarly to what is done in the near-infrared, high frequencies spatial filtering of the incoming beams can be achieved using single-mode waveguides operating in the mid-infrared. An appreciable reduction of the instrumental complexity is also possible using integrated optics (IO) devices in this spectral range. The relative lack of single-mode guided optics in the mid-infrared has motivated the present technological study to demonstrate the feasibility of dielectric waveguides functioning at longer wavelengths. We propose to use selenide and telluride components to pursue the development of more complex IO functions.

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