Signal nonlinearity measurements and corrections in MWIR and LWIR HgCdTe H2RG arrays for NEO Surveyor
Author
Zengilowski, G.R.McMurtry, C.W.
Pipher, J.L.
Reilly, N.S.
Forrest, W.J.
Cabrera, M.S.
Dorn, M.L.
Wong, A.F.
Mainzer, A.K.
Affiliation
University of Arizona, Lunar and Planetary Sciences LaboratoryIssue Date
2020
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SPIECitation
Zengilowski, G. R., McMurtry, C. W., Pipher, J. L., Reilly, N. S., Forrest, W. J., Cabrera, M. S., ... & Mainzer, A. K. (2020, December). Signal nonlinearity measurements and corrections in MWIR and LWIR HgCdTe H2RG arrays for NEO surveyor. In X-Ray, Optical, and Infrared Detectors for Astronomy IX (Vol. 11454, p. 1145435). International Society for Optics and Photonics.Rights
Copyright © 2020 SPIE.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
The depletion region around each p-n junction in HgCdTe HAWAII-2RG detector arrays decreases in volume as charge is collected, causing the pixel capacitance to change continuously throughout an integration period. This changing capacitance manifests as a steadily decreasing measured signal rate while observing a constant flux. Ignoring this nonlinear response to signal accumulation can lead to underestimating the number of detected pho- tons by as much as 10%. Presented here are two methods, one simple and one complex, of measuring this signal nonlinearity and a theoretical framework behind a nonlinearity correction method. Additionally, experimental data are compared with simulations to explain methods to reduce noise in the nonlinearity measurement and identify deviations from the expected behavior that merit further study. © SPIE. Downloading of the abstract is permitted for personal use only.Note
Immediate accessISSN
0277-786XISBN
9781510000000Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1117/12.2563138