Performance benefits of charge-domain gain in active shortwave infrared targeting

Burrell, Derek; Follansbee, Joshua; Furxhi, Orges; Spencer, Mark; Lund, John; Kyle Renshaw, C.; Driggers, Ronald

doi:10.1117/1.oe.63.1.013104

Opt. Eng.

2024

DOI: 10.1117/1.oe.63.1.013104

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Performance benefits of charge-domain gain in active shortwave infrared targeting

Derek Burrell,

Joshua Follansbee,

Orges Furxhi

et al.

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Cited by 1 publication

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Illumination power requirements for an MCT APD vs. a COTS camera at 1.645um

Follansbee,

Frye,

Hui

et al. 2024

Unconventional Imaging, Sensing, and Adaptive Optics 2024

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Active imaging techniques can provide increased signal-to-noise ratio over passive imaging approaches, particularly in the reflective infrared bands (NIR, SWIR, and eSWIR) where passive solar illumination is reduced relative to the visible band. However, providing sufficient illuminator power at long range can introduce severe SWaP tradeoffs for system designers, as the strength of the illumination for a resolved laser spot scales proportionally to the inverse square of the illuminator-to-target distance. Active systems must therefore use illuminator photons efficiently. Avalanche photodiodes (APDs) offer high gain in the electronic domain, allowing the detection of a small number of photons by boosting the signal above the floor imposed by read noise. We compare the contrast-to-noise ratio performance of a mercury-cadmium-telluride (MCT) APD camera and a COTS InGaAs SWIR camera with an illuminator at 1.645 [um] as a function of illuminator power. Factors affecting performance are discussed.

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Illumination power requirements for an MCT APD vs. a COTS camera at 1.645um

Follansbee,

Frye,

Hui

et al. 2024

Unconventional Imaging, Sensing, and Adaptive Optics 2024

View full text Add to dashboard Cite

show abstract

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Performance benefits of charge-domain gain in active shortwave infrared targeting

Cited by 1 publication

References 33 publications

Illumination power requirements for an MCT APD vs. a COTS camera at 1.645um

Illumination power requirements for an MCT APD vs. a COTS camera at 1.645um

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