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White Light Heterodyne Interferometry SNR
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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White light heterodyne interferometry is a powerful technique for obtaining high-angular resolution information of astronomical objects, and avoids some of the technical challenges of direct detection interferometry. However, it suffers a significant SNR penalty. This report derives the SNR equations for heterodyne interferometry and compares its performance to a direct detection interferometer in the visible through LWIR wavelength range. Relative performance for imaging deep space, solar-illuminated objects is discussed.
APPROVED FOR PUBLIC RELEASE