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Integrated Photonic Circuits for the Detection of Millimeter and Submillimeter Radio Signals for Space Applications

Publicado en:International Conference On Transparent Optical Networks. - 2024-01-01 (), DOI: 10.1109/ICTON62926.2024.10647975

Autores: Cesar-Cuello, Jessica; Zarzuelo, Alberto; Santamaria, Gabriel; Falcon-Gomez, Enderson; Guzman, Robinson; Gonzalez, Luis; Mendinueta, Jose Manuel Delgado; Garcia-Munoz, Luis E; Carpintero, Guillermo

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This paper describes the first steps towards the development of an integrated microwave photonic radiometer capable of operating at room temperature with low noise. The radiometer is designed to be deployed in a CubeSat for Earth observation and weather monitoring. Its working principle relies on the nonlinearity of lithium niobate, which enables an upconversion process that boosts the microwave photon energy to the optical domain, where photodetectors are less susceptible to thermal noise at room temperature than their microwave counterparts. The key parts of the radiometer are the upconverter, which consists of an optical subsystem formed by a lithium niobate ring resonator and an asymmetric Mach-Zehnder interferometer (AMZI), and an RF subsystem, which consists of two half-wavelength resonators and two patch antennas. To test the response of the former subsystem, a ring resonator and an AMZI were initially integrated into a lithium niobate photonic integrated circuit (PIC). This paper presents the experimental characterization of the optical components as well as the design and working principles of the upconverter. Regarding the optical components, we measured intrinsic quality factors of around 0.65 center dot 10(6) in the ring resonator and extinction ratios of about 20 dB in the AMZI.

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