Measuring of signal to noise ratio of a faint signal immersed in a highly noisy background using a rotationally shearing interferometer

Manuel Montes-Flores; Guillermo Garcia-Torales; Marija Strojnik

doi:10.1117/12.2634441

30 September 2022 Measuring of signal to noise ratio of a faint signal immersed in a highly noisy background using a rotationally shearing interferometer

Manuel Montes-Flores, Guillermo Garcia-Torales, Marija Strojnik

Author Affiliations +

Proceedings Volume 12233, Infrared Remote Sensing and Instrumentation XXX; 122330P (2022) https://doi.org/10.1117/12.2634441
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Conference Poster

Abstract

The signal-to-noise ratio compares the power of a signal with information of interest against an undesired signal considered noise. In a lab experiment, we measured the signal-to-noise ratio of two intensity patterns in a Rotational Shearing Interferometer based on a Mach-Zehnder configuration with a dove prism in one arm of the interferometer. One signal represents the faint radiation of a planet, and another means the high radiation from a star. The proper rotation of the dove prism eliminates the intensity pattern produced by the star, but the intensity pattern due to the planet prevails. The rotation of the dove prism improves the extremely small SNR of these signals. This improvement helps the planet detection near a star by interferometric methods.

Citation Download Citation

Manuel Montes-Flores, Guillermo Garcia-Torales, and Marija Strojnik "Measuring of signal to noise ratio of a faint signal immersed in a highly noisy background using a rotationally shearing interferometer", Proc. SPIE 12233, Infrared Remote Sensing and Instrumentation XXX, 122330P (30 September 2022); https://doi.org/10.1117/12.2634441

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