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, C. Groppi

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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
Title of host publicationISSTT 2017 - 28th International Symposium on Space Terahertz Technology
PublisherISSTT2017
Volume2017-March
Publication statusPublished - 2017
Event28th International Symposium on Space Terahertz Technology, ISSTT 2017 - Cologne, Germany
Duration: 13 Mar 201715 Mar 2017

Conference

Conference28th International Symposium on Space Terahertz Technology, ISSTT 2017
CountryGermany
CityCologne
Period13/03/1715/03/17

Fingerprint Dive into the research topics of 'Demonstration and stabilization of a 2x4 HEB array receiver at 1.4 THz based on a Fourier phase grating local oscillator'. Together they form a unique fingerprint.

Cite this