CONFERENCE PROCEEDINGS
Advanced Search
Home > Proceedings > Volume 11453 > Article
Presentation
13 December 2020 Multi-beam local oscillator for a 100-pixel heterodyne array receiver at THz
Yuner Gan, Behnam Mirzaei, Jose R. G. Silva, Ali Khalatpour, Qing Hu, Christopher Groppi, Jose V. Siles, Floris van der Tak, Jian-Rong Gao
Author Affiliations +
Proceedings Volume 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X; 114530S (2020) https://doi.org/10.1117/12.2560939
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only
Abstract
Generating multiple local oscillator beams is one challenge to develop large heterodyne receiver arrays (~100 pixels), which allow astronomical instrumentations mapping more area within limited space mission lifetime. Here, We combine a reflective Fourier grating with an unidirectional antenna coupled 3rd-order distributed feedback (DFB) quantum cascade laser (QCL) to generate 81 beams at 3.86 THz. We have measured the beam pattern of the diffracted 81 beams, which agrees well with a simulated result from COMSOL Multiphysics with respect to the angular distribution and power distribution among the 81 beams. The diffraction efficiency of the Fourier grating is derived to be 94±3%, which is very close to the simulated result of 97%. For an array of equal superconducting hot electron bolometer mixers, 64 out of 81 beams can pump the HEB mixers with similar power, resulting in receiver sensitivities within 10%. Such a combination of a Fourier grating and a QCL can create an LO with 100 beams or more, enabling a new generation of large heterodyne arrays for astronomical instrumentation. This paper is essentially a copy of our paper in Optics Express.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation Download Citation
Yuner Gan, Behnam Mirzaei, Jose R. G. Silva, Ali Khalatpour, Qing Hu, Christopher Groppi, Jose V. Siles, Floris van der Tak, and Jian-Rong Gao "Multi-beam local oscillator for a 100-pixel heterodyne array receiver at THz", Proc. SPIE 11453, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X, 114530S (13 December 2020); https://doi.org/10.1117/12.2560939
ACCESS THE FULL ARTICLE
ORGANIZATIONAL
Sign in with credentials provided by your organization.
INSTITUTIONAL
Select your institution to access the SPIE Digital Library.
SELECT YOUR INSTITUTION
PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
PERSONAL SIGN IN
No SPIE Account? Create one
PURCHASE THIS CONTENT
SUBSCRIBE TO DIGITAL LIBRARY
50 downloads per 1-year subscription
Members: $195
Non-members: $335 ADD TO CART
25 downloads per 1 - year subscription
Members: $145
Non-members: $250 ADD TO CART
PURCHASE SINGLE ARTICLE
Includes PDF, HTML & Video, when available
Members: $17.00
Non-members: $21.00 ADD TO CART
PROCEEDINGS
 PRESENTATION
WATCH
PRESENTATION SAVE TO MY LIBRARY
GET CITATION
Advertisement
Advertisement
KEYWORDS
Heterodyning
Quantum cascade lasers
Receivers
Terahertz radiation
Oscillators
Diffraction gratings
Diffraction
RELATED CONTENT
Subscribe to Digital Library
Receive Erratum Email Alert
Back to Top