Performance of short wave cutoff MBE HgCdTe 2D arrays: spaceborne application for sensing OH airglow wave structure

John B. Kumer; Richard L. Rairden; Gary R. Swenson; Neil Rowlands; William A. Gault; William E. Ward

doi:10.1117/12.426969

15 May 2001 Performance of short wave cutoff MBE HgCdTe 2D arrays: spaceborne application for sensing OH airglow wave structure

John B. Kumer, Richard L. Rairden, Gary R. Swenson, Neil Rowlands, William A. Gault, William E. Ward

Author Affiliations +

Proceedings Volume 4306, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications II; (2001) https://doi.org/10.1117/12.426969
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

Passive radiative cooling is desirable for space borne detectors because it is generally cheaper, less massive and power consumptive than cooling by a mechanical refrigerator or expendable cryogens. Our interest is space borne nadir imaging the OH airglow in Q-branch features of the 9->6 band at approximately 1382.3 nm, and the 2->0 band at approximately 1434.4 nm with sufficient signal to noise to quantitatively retrieve wave structure. Low noise 256 X 256- 40 micrometer pitch HgCdTe detector arrays are available for our application. E.g., the Rockwell Science Center standard 2.5 micrometers PACE product bonded on to the PICNIC read out MUL satisfies our high sensitive and low read noise requirements, but would require a mechanical refrigerator or expendable cryogen to cool sufficiently to satisfy our dark current requirement. To demonstrate an option that would provide our required performance at viable passive radiative cooling temperature, we have procured examples of the more recent RSC double layer planar heterogenous HgCdTe 2D arrays with shorter wavelength cutoff and produced by molecular beam epitaxy on a CdZnTe substrate, and bonded to the PICNIC MUL. Here we describe our test procedures and results that these at relatively warm temperature, the order 160 to 170K, satisfy the requirements for our OH airglow wave imaging application. We describe an instrument model and observational operations to observe the OH airglow wave structure with signal to noise > 100.

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John B. Kumer, Richard L. Rairden, Gary R. Swenson, Neil Rowlands, William A. Gault, and William E. Ward "Performance of short wave cutoff MBE HgCdTe 2D arrays: spaceborne application for sensing OH airglow wave structure", Proc. SPIE 4306, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications II, (15 May 2001); https://doi.org/10.1117/12.426969

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KEYWORDS

Airglow

Sensors

Mercury cadmium telluride

Multiplexers

Optical filters

Quantum efficiency

Cryogenics

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