@inproceedings{d7e17a5b966e4c17b4dd70fa0bc4d8d3,
title = "An ultra-broadband optical system for ALMA Band 2+3",
abstract = "ALMA is the largest radio astronomical facility in the world providing high sensitivity between 35 and 950 GHz, divided in 10 bands with fractional bandwidths between 19 and 36%. Having a lifespan of at least 30 years, ALMA carries out a permanent upgrading plan which, for the receivers, is focused on achieving better sensitivity and larger bandwidths. As result, an international consortium works on demonstrating a prototype receiver covering currents Bands 2 and 3 (67 to 116 GHz) which corresponds to a fractional bandwidth of 54%. Here we present the preliminary design, implementation and characterization of suitable refractive optics. Results indicate an excellent performance in good agreement with simulations.",
keywords = "ALMA,Band 2+3,Fresnel lens,OMT,Optics,Profile-optimized corrugated horn,Ultra-broad bandwidth,heterodyne detection",
author = "V. Tapia and R. Nesti and A. Gonz{\'a}lez and I. Barrueto and Mena, {F. P.} and N. Reyes and F. Villa and F. Cuttaia and P. Yagoubov",
year = "2016",
month = jul,
day = "1",
doi = "10.1117/12.2233143",
language = "English",
series = "Proceedings of SPIE",
publisher = "SPIE",
editor = "Holland, {Wayne S.} and Jonas Zmuidzinas",
booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII",
address = "United States",
}