24 September 2012 Local oscillator sub-systems for array receivers in the 1-3 THz range
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Abstract
Recent results from the Heterodyne Instrument for the Far-Infrared (HIFI) on the Herschel Space Telescope have confirmed the usefulness of high resolution spectroscopic data for a better understanding of our Universe. This paper will explore the current status of tunable local oscillator sources with emphasis on building a multi-pixel LO subsystem for the scientifically important CII line around 1908 GHz. Recent results have shown that over 50 microwatts of output power at 1.9 THz are possible with an optimized single pixel LO chain. These power levels are now sufficient to pump array receivers in this frequency range. Further power enhancement can be obtained by cooling the chain to 120 K or by utilizing in-phase power combining technology.
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Imran Mehdi, Imran Mehdi, Jose V. Siles, Jose V. Siles, Alain Maestrini, Alain Maestrini, Robert Lin, Robert Lin, Choonsup Lee, Choonsup Lee, Erich Schlecht, Erich Schlecht, Goutam Chattopadhyay, Goutam Chattopadhyay, "Local oscillator sub-systems for array receivers in the 1-3 THz range", Proc. SPIE 8452, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VI, 845212 (24 September 2012); doi: 10.1117/12.925256; https://doi.org/10.1117/12.925256
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