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Proceedings Paper

Development of high-speed, low-noise NIR HgCdTe avalanche photodiode arrays for adaptive optics and interferometry
Author(s): Gert Finger; Ian Baker; Reinhold Dorn; Siegfried Eschbaumer; Derek Ives; Leander Mehrgan; Manfred Meyer; Jörg Stegmeier
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Paper Abstract

The most promising way to overcome the CMOS noise barrier of infrared AO sensors is the amplification of the photoelectron signal directly at the point of absorption inside the infrared pixel by means of the avalanche gain. HgCdTe eAPD arrays with cut off wavelengths of λc ~2.64 μm produced by SELEX-Galileo have been evaluated at ESO. The arrays were hybridized to an existing non-optimized ROIC developed for laser gated imaging which has a format of 320×256 pixels and four parallel video outputs. The avalanche gain makes it possible to reduce the read noise to < 7 e rms. The dark current requirements of IR wavefront sensing are also met.

Paper Details

Date Published: 19 July 2010
PDF: 14 pages
Proc. SPIE 7742, High Energy, Optical, and Infrared Detectors for Astronomy IV, 77421K (19 July 2010); doi: 10.1117/12.857316
Show Author Affiliations
Gert Finger, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Ian Baker, SELEX Galileo Infrared Ltd. (United Kingdom)
Reinhold Dorn, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Siegfried Eschbaumer, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Derek Ives, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Leander Mehrgan, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Manfred Meyer, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)
Jörg Stegmeier, European Organisation for Astronomical Research in the Southern Hemisphere (Germany)


Published in SPIE Proceedings Vol. 7742:
High Energy, Optical, and Infrared Detectors for Astronomy IV
Andrew D. Holland; David A. Dorn, Editor(s)

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