A 4.7 THz HEB QCL receiver for STO2

Darren J. Hayton, Jian Rong Gao, Wouter Laauwen, Behnam Mirzaei, Andrey Khudchenko, Jenna L. Kloosterman, Dmitry Paveliev, Qing Hu, Wilt Kao, Vladimir Vax, Chris K. Walker

Research output: Contribution to conferencePaperpeer-review


We report on a 4.7 THz heterodyne receiver designed for high resolution spectroscopy of the astronomically important neutral oxygen (OI) line at 4.745 THz. The receiver is based around a hot electron bolometer (HEB) mixer and quantum cascade laser (QCL) local oscillator. This receiver has been developed to fly on the Stratospheric Terahertz Observatory (STO-2), a balloon-borne 0.8 m telescope observing from an altitude of 44 km for 14 days or more. We measure a double sideband receiver noise temperature of 815 K (~ 7 times quantum noise) with a noise temperature IF bandwidth of 3.5 GHz. We describe the receiver performance expected in flight and outline novel approaches to QCL amplitude and frequency stabilization.

Original languageEnglish (US)
StatePublished - 2017
Event27th International Symposium on Space Terahertz Technology, ISSTT 2016 - Nanjing, China
Duration: Apr 12 2016Apr 15 2016


Other27th International Symposium on Space Terahertz Technology, ISSTT 2016

ASJC Scopus subject areas

  • Radiation
  • Space and Planetary Science
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering
  • Computer Networks and Communications


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