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Article

A Microwave Polarimeter Demonstrator for Astronomy with Near-Infra-Red Up-Conversion for Optical Correlation and Detection

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Instituto de Física de Cantabria (IFCA), Avda. Los Castros s/n, 39005 Santander, Spain
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Departamento Ingeniería de Comunicaciones (DICOM), Universidad de Cantabria, Plaza de la Ciencia s/n, 39005 Santander, Spain
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Grupo de Ingeniería Fotónica, Universidad de Cantabria, Plaza de la Ciencia s/n, 39005 Santander, Spain
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Biomedical Research Networking Center in Bioengineering Biomaterials and Nanomedicine (CIBER-BBN), Plaza de la Ciencia s/n, 39005 Santander, Spain
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Instituto de Investigacion Sanitaria Valdecilla (IDIVAL), Calle Cardenal Herrera Oria, 39011 Santander, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(8), 1870; https://doi.org/10.3390/s19081870
Received: 4 March 2019 / Revised: 11 April 2019 / Accepted: 16 April 2019 / Published: 19 April 2019
(This article belongs to the Section Remote Sensors)
This paper presents a 10 to 20 GHz bandwidth microwave polarimeter demonstrator, based on the implementation of a near-infra-red frequency up-conversion stage that allows both the optical correlation, when operating as a synthesized-image interferometer, and signal detection, when operating as a direct-image instrument. The proposed idea is oriented towards the implementation of ultra-sensitive instruments presenting several dozens or even thousands of microwave receivers operating in the lowest bands of the cosmic microwave background. In this work, an electro-optical back-end module replaces the usual microwave detection stage with Mach–Zehnder modulators for the frequency up-conversion, and an optical stage for the signals correlation and detection at near-infra-red wavelengths (1550 nm). As interferometer, the instrument is able to correlate the signals of large-format instruments, while operating as a direct imaging instrument also presents advantages in terms of the possibility of implementing the optical back end by means of photonic integrated circuits to achieve reductions in cost, weight, size, and power consumption. A linearly polarized input wave, with a variable polar angle, is used as a signal source for laboratory tests. The receiver demonstrator has proved its capabilities of being used as a new microwave-photonic polarimeter for the study of the lowest bands of cosmic microwave background. View Full-Text
Keywords: instrumentation; astronomy; polarization; cosmic microwave background; microwave photonics; direct imaging; synthesized imaging; interferometry instrumentation; astronomy; polarization; cosmic microwave background; microwave photonics; direct imaging; synthesized imaging; interferometry
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MDPI and ACS Style

Casas, F.J.; Ortiz, D.; Aja, B.; de la Fuente, L.; Artal, E.; Ruiz, R.; Mirapeix, J.M. A Microwave Polarimeter Demonstrator for Astronomy with Near-Infra-Red Up-Conversion for Optical Correlation and Detection. Sensors 2019, 19, 1870. https://doi.org/10.3390/s19081870

AMA Style

Casas FJ, Ortiz D, Aja B, de la Fuente L, Artal E, Ruiz R, Mirapeix JM. A Microwave Polarimeter Demonstrator for Astronomy with Near-Infra-Red Up-Conversion for Optical Correlation and Detection. Sensors. 2019; 19(8):1870. https://doi.org/10.3390/s19081870

Chicago/Turabian Style

Casas, Francisco J., David Ortiz, Beatriz Aja, Luisa de la Fuente, Eduardo Artal, Rubén Ruiz, and Jesús M. Mirapeix. 2019. "A Microwave Polarimeter Demonstrator for Astronomy with Near-Infra-Red Up-Conversion for Optical Correlation and Detection" Sensors 19, no. 8: 1870. https://doi.org/10.3390/s19081870

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