Common-mode rejection in Martin-Puplett spectrometers for astronomical observations at mm-wavelengths
Instrumentation and Methods for Astrophysics
2023-07-19 v2 Cosmology and Nongalactic Astrophysics
Abstract
The Martin-Puplett interferometer (MPI) is a differential Fourier transform spectrometer (FTS), measuring the difference between spectral brightness at two input ports. This unique feature makes the MPI an optimal zero instrument, able to detect small brightness gradients embeddend in a large common background. In this paper we investigate experimentally the common-mode rejection achievable in the MPI at mm wavelengths, and discuss the use of the instrument to measure the spectrum of cosmic microwave background (CMB) anisotropy.
Keywords
Cite
@article{arxiv.1509.09221,
title = {Common-mode rejection in Martin-Puplett spectrometers for astronomical observations at mm-wavelengths},
author = {Giuseppe D'Alessandro and Paolo de Bernardis and Silvia Masi and Alessandro Schillaci},
journal= {arXiv preprint arXiv:1509.09221},
year = {2023}
}