47 THz asymmetric beam multiplexer for GUSTO
Name
oe-29-15-24434.pdf
Description
Published version
Size
5.75 MB
Format
Adobe PDF
Checksum (MD5)
e53340b8bc2d0f8f45ce0c69a80fd113
Author(s)
Mirzaei, Behnam
Gan, Yuner
Finkel, Matvey
Groppi, Christopher
Young, Abram
Walker, Christopher
Hu, Qing
Gao, Jian-Rong
Date Issued
2021
Journal
Optics Express
Publisher
The Optical Society
Citation
Mirzaei, Behnam, Gan, Yuner, Finkel, Matvey, Groppi, Christopher, Young, Abram et al. 2021. "47 THz asymmetric beam multiplexer for GUSTO." Optics Express, 29 (15).
Version
Final published version
Abstract
A full demonstration of the Fourier phase grating used as 4.7 THz local oscillator (LO) multiplexer for Galactic/Extragalactic ULDB Spectroscopic Terahertz Observatory (GUSTO) is presented in this paper, including its design, modeling, tolerance analysis, and experimental characterizations of the angular and intensity distributions among 2 × 4 output beams and the power efficiency. A quantum cascade laser (QCL) is used to generate the input beam for evaluation of the grating performance in its all relevant aspects with an accuracy level never reported before, where good agreements with modeling results are found. This is the first asymmetric-profile grating fully modelled and characterized at a THz frequency, that further confirms the versatility of this technology for providing an intermediate optical element for feeding multiple array detectors with a single radiation source at such a scientifically interesting frequency regime.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1364/OE.432088
