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Performance of MICRO’s photonic heterodyne spectrometers

Presentation #401.01 in the session Connections Within Solar Physics.

Published onSep 18, 2023
Performance of MICRO’s photonic heterodyne spectrometers

We present the results of performance tests for the photonic heterodyne spectrometers that form the front end of the MICRO photonic magnetograph. MICRO, the “Magnetograph using Interferometric and Computational imaging for Remote Observations” collapses the bulk of the optical elements of the magnetograph to a single, multilayer wafer. The long-term goal of our MICRO project is to create a class of magnetographs that dispense with traditional telescopes and mechanical filter components — replacing them with a stack of integrated circuits. We achieve this by using a patented combination of interferometric imaging, tunable lasers, and digital processing. Photonic magnetographs could scale from 2cm in diameter to 30cm on a single silicon wafer, with resolutions varying from 1 to 16 arc seconds while retaining an essentially wafer-like profile.

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