17 May 2006 High quantum efficiency C-QWIP FPA based IR cameras
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Abstract
Current generation QWIP detectors, although very cost effective, have relatively narrow spectral range and low quantum efficiencies. Tactical operation is generally limited to a single spectral band. These limitations arise from the design approach and restrict applications to those that can tolerate these performance limitations. Using recent device design improvements, a novel material, and special processing approaches, High Quantum Efficiency Dual Band C-QWIP detectors are currently being developed. These are expected to overcome traditional limitations in the QWIP design approach and deliver extremely high performance. In the first phase of the program, single color LWIR and VLWIR C-QWIP FPAs in large (1024x1024) format will be demonstrated with targeted peak quantum efficiency of 35%, and correspondingly high BLIP operating temperatures. In the next phase of the program, the team will continue to improve QE towards 50% with conversion efficiency of 75%, and demonstrate dual band MW/LW FPAs. The detector gain will be optimized for operation in either low background or high background applications. These goals will be accomplished using highly producible/low cost materials and processes. System considerations include ROIC well capacity, noise performance, as optics configuration and other concerns will be addressed. A robust design for high performance in a variety of applications will be shown. This work is being performed by the Army Research Laboratory (ARL) and L-3 Cincinnati Electronics (CE), with funding provided by the Missile Defense Agency.
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John Devitt, David P. Forrai, Darrel Endres, Richard Rawe, Bob Fischer, K. K. Choi, V. Swaminathan, "High quantum efficiency C-QWIP FPA based IR cameras", Proc. SPIE 6206, Infrared Technology and Applications XXXII, 62060C (17 May 2006); doi: 10.1117/12.664714; https://doi.org/10.1117/12.664714
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