NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
HgCdTe Avalanche Photodiode Detectors for Airborne and Spaceborne Lidar at Infrared WavelengthsWe report results from characterizing the HgCdTe avalanche photodiode (APD) sensorchip assemblies (SCA) developed for lidar at infrared wavelength using the high density vertically integrated photodiodes (HDVIP) technique. These devices demonstrated high quantum efficiency, typically greater than 90 between 0.8 micrometers and the cut-off wavelength, greater than 600 APD gain, near unity excess noise factor, 6-10 MHz electrical bandwidth and less than 0.5 fW/Hz(exp.1/2) noise equivalent power (NEP). The detectors provide linear analog output with a dynamic range of 2-3 orders of magnitude at a fixed APD gain without averaging, and over 5 orders of magnitude by adjusting the APD and preamplifier gain settings. They have been successfully used in airborne CO2 and CH4 integrated path differential absorption (IPDA) lidar as a precursor for space lidar applications.
Document ID
20170005193
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Sun, Xiaoli
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Abshire, James B.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Beck, Jeffrey D.
(DRS Technologies, Inc. Dallas, TX, United States)
Mitra, Pradip
(DRS Technologies, Inc. Dallas, TX, United States)
Reiff, Kirk
(A/DIC, Inc. Longwood, FL, United States)
Yang, Guangning
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
June 6, 2017
Publication Date
July 10, 2017
Publication Information
Publication: Optics Express
Volume: 25
Issue: 14
ISSN: 1094-4087
Subject Category
Communications And Radar
Optics
Statistics And Probability
Report/Patent Number
GSFC-E-DAA-TN43241
Distribution Limits
Public
Copyright
Other
No Preview Available