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2002•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access

9-μm cutoff 640x512 pixel GaAs/Al x Ga1 -x As quantum well infrared photodetector handheld camera

Sarath D. Gunapala, Sumith V. Bandara, John K. Liu, Sir B. Rafol, C. A. Shott, Richard W. Jones, Stanley Laband, James T. Woolaway, J. M. Fastenau, Amy W. Liu

Open publisher page 3 citations

Abstract

A 9 micrometers cutoff 640x512 pixel hand-held quantum well infrared photodetector (QWIP) camera has been demonstrated with excellent imagery. Based on the single pixel test data, a noise equivalent differential temperature (NETD) of 8 mI is expected at 65K operating temperature with f/2 optics at 300K background. This focal plane array has shown background limited performance (BPLI) at 72K operating temperature with the same optics and background conditions. In this paper, we discuss the development of this very sensitive long wavelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array and its performance in quantum efficiency, NETD, uniformity, and operability.

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What this paper is about

A 9 micrometers cutoff 640x512 pixel hand-held quantum well infrared photodetector (QWIP) camera has been demonstrated with excellent imagery. Based on the single pixel test data, a noise equivalent differential temperature (NETD) of 8 mI is expected at 65K operating temperature with f/2 optics at 300K background. This focal plane array has shown background limited performance (BPLI) at 72K operating temperature with the same optics and background conditions. In this paper, we discuss the development of this very sensitive long wavelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array and its performance in quantum efficiency, NETD, uniformity, and operability.

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Available abstract

A 9 micrometers cutoff 640x512 pixel hand-held quantum well infrared photodetector (QWIP) camera has been demonstrated with excellent imagery. Based on the single pixel test data, a noise equivalent differential temperature (NETD) of 8 mI is expected at 65K operating temperature with f/2 optics at 300K background. This focal plane array has shown background limited performance (BPLI) at 72K operating temperature with the same optics and background conditions. In this paper, we discuss the development of this very sensitive long wavelength infrared (LWIR) camera based on a GaAs/AlGaAs QWIP focal plane array and its performance in quantum efficiency, NETD, uniformity, and operability.

Key concepts: Quantum well infrared photodetector, Photodetector, Dot pitch, Large format, Optics, Optoelectronics, Infrared, Cardinal point

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9-μm cutoff 640x512 pixel GaAs/Al x Ga1 -x As quantum well infrared photodetector handheld camera — Research Paper | ScholarLens