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9 July 2018 A proposal of a photonic local system for the extended Atacama large millimeter/submillimeter array and advanced radio interferometers
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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.
Conference Presentation
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H. Kiuchi "A proposal of a photonic local system for the extended Atacama large millimeter/submillimeter array and advanced radio interferometers", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 1070813 (9 July 2018); https://doi.org/10.1117/12.2312406
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