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86379 |
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|a Kloosterman, J. L.
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|a Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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|a Kao, Tsung-Yu
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|a Hu, Qing
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|a Hayton, D. J.
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|a Ren, Y.
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|a Hovenier, J. N.
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|a Gao, J. R.
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|a Klapwijk, T. M.
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|a Walker, C. K.
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|a Reno, J. L.
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|a Kao, Tsung-Yu
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|a Hu, Qing
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|a Hot electron bolometer heterodyne receiver with a 4.7-THz quantum cascade laser as a local oscillator
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|b American Institute of Physics (AIP),
|c 2014-05-02T17:27:22Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/86379
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|a We report on a heterodyne receiver designed to observe the astrophysically important neutral atomic oxygen [OI] line at 4.7448 THz. The local oscillator is a third-order distributed feedback quantum cascade laser operating in continuous wave mode at 4.741 THz. A quasi-optical, superconducting NbN hot electron bolometer is used as the mixer. We recorded a double sideband receiver noise temperature ( T[DSB over rec] ) of 815 K, which is ~ 7 times the quantum noise limit ( [hν over 2kB] ) and an Allan variance time of 15 s at an effective noise fluctuation bandwidth of 18 MHz. Heterodyne performance was confirmed by measuring a methanol line spectrum.
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|a United States. National Aeronautics and Space Administration
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|a National Science Foundation (U.S.)
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|a en_US
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|a Article
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|t Applied Physics Letters
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