Demonstration and stabilization of a 2x4 HEB array receiver at 1.4 THz based on a Fourier phase grating local oscillator

J. R. Silva, X. Liu, B. Mirzaei, Y. C. Luo, D. J. Hayton, J. R. Gao, Christopher Groppi

Research output: Contribution to conferencePaper

Abstract

This paper is a report on the demonstration and stabilization of a 2x4 NbN hot electron bolometer (HEB) array receiver for GUSTO based on a multiple beam local oscillator (LO). Through the combination of a FIR Gas laser and a Fourier phase grating we were able to generate a 8 beam pattern at 1.4 THz. For the array demonstration, it used a 2x2 HEB mixer array which was translated vertically to match the full 2x4 LO beam pattern. Here two lens with a 60 mm were applied to reduce the beam pattern divergence, allowing for a 12 mm spacing between the beams to be achieved at 130 mm from the grating. To stabilize the array receiver, we introduced a new stabilization method, requiring only a voice coil PID controlled loop between the beam originated from the gas laser and a given pumped pixel. The total power Allan time measurements indicate a five times improvement on a two-pixel system stability.

Original languageEnglish (US)
StatePublished - Jan 1 2017
Event28th International Symposium on Space Terahertz Technology, ISSTT 2017 - Cologne, Germany
Duration: Mar 13 2017Mar 15 2017

Other

Other28th International Symposium on Space Terahertz Technology, ISSTT 2017
CountryGermany
CityCologne
Period3/13/173/15/17

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ASJC Scopus subject areas

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

Cite this

Silva, J. R., Liu, X., Mirzaei, B., Luo, Y. C., Hayton, D. J., Gao, J. R., & Groppi, C. (2017). Demonstration and stabilization of a 2x4 HEB array receiver at 1.4 THz based on a Fourier phase grating local oscillator. Paper presented at 28th International Symposium on Space Terahertz Technology, ISSTT 2017, Cologne, Germany.