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Proceedings Paper

Near-infrared InGaAs detectors for background-limited imaging and photometry
Author(s): Peter W. Sullivan; Bryce Croll; Robert A. Simcoe
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Paper Abstract

Originally designed for night-vision equipment, InGaAs detectors are beginning to achieve background-limited performance in broadband imaging from the ground. The lower cost of these detectors can enable multi-band instruments, arrays of small telescopes, and large focal planes that would be uneconomical with high-performance HgCdTe detectors. We developed a camera to operate the FLIR AP1121 sensor using deep thermoelectric cooling and up-the-ramp sampling to minimize noise. We measured a dark current of 163 e- s-1 pix-1, a read noise of 87 e- up-the-ramp, and a well depth of 80k e-. Laboratory photometric testing achieved a stability of 230 ppm hr-1/2, which would be required for detecting exoplanet transits. InGaAs detectors are also applicable to other branches of near-infrared time-domain astronomy, ranging from brown dwarf weather to gravitational wave follow-up.

Paper Details

Date Published: 23 July 2014
PDF: 9 pages
Proc. SPIE 9154, High Energy, Optical, and Infrared Detectors for Astronomy VI, 91541F (23 July 2014); doi: 10.1117/12.2056425
Show Author Affiliations
Peter W. Sullivan, MIT Kavli Institute for Astrophysics and Space Research (United States)
Bryce Croll, MIT Kavli Institute for Astrophysics and Space Research (United States)
Robert A. Simcoe, MIT Kavli Institute for Astrophysics and Space Research (United States)


Published in SPIE Proceedings Vol. 9154:
High Energy, Optical, and Infrared Detectors for Astronomy VI
Andrew D. Holland; James Beletic, Editor(s)

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