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A proposal of a photonic local system for the extended Atacama large millimeter/submillimeter array and advanced radio interferometers
Author(s): H. Kiuchi
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Paper Abstract

In ALMA, considerable effort is being made to realize a long-baseline observation and a high-frequency observation. To be implemented these observations, it is required to deliver a high-stable LO signal with frequency switching capability. For high-frequency observations, the frequency switching function is indispensable to compensate atmospheric scintillation. We propose a photonic local oscillator (LO) system capable of satisfying required performances without any modifications on the ALMA antenna side. Furthermore, a direct photonic LO system over a large broadband system has a capable of being applied to the next generation ALMA, and advanced Radio Interferometers. In this paper, the high-frequency LO signal is generated and transmitted as a beat signal of dual-wavelength optical signal. The final purpose of this research is to provide a direct photonic LO system with a cable transmission correction over a large broadband from microwave to terahertz frequencies for advanced Radio Interferometers.

Paper Details

Date Published: 9 July 2018
PDF: 7 pages
Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 1070813 (9 July 2018); doi: 10.1117/12.2312406
Show Author Affiliations
H. Kiuchi, National Astronomical Observatory of Japan (Japan)

Published in SPIE Proceedings Vol. 10708:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX
Jonas Zmuidzinas; Jian-Rong Gao, Editor(s)

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