Theory And Status Of High Performance Heterodyne Detectors

D. L. Spears

doi:10.1117/12.932589

30 April 1982 Theory And Status Of High Performance Heterodyne Detectors

D. L. Spears

Proceedings Volume 0300, Physics and Technology of Coherent Infrared Radar I; (1982) https://doi.org/10.1117/12.932589
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

Recently developed wide-bandwidth HgCdTe photodiodes and photoconductors have shown near-ideal heterodyne performance and have led to greatly increased CO2 laser heterodyne system capabilities. For example, NEPs as low as 4.3 x 10^-20W/Hz at 1 GHz have been achieved with 77K photodiodes and photodiode arrays, and an NEP of 1.8 x 10^-19W/Hz at 40 MHz has been realized with a p-type HgCdTe photoconductor operating at 195K. In this paper, design considerations (including limitations due to various HgCdTe material parameters), performance predictions and the current technological status of wide-bandwidth HgCdTe photodiodes are presented. In addition, the use of p-type HgCdTe photoconductors as elevated-temperature photomixers are discussed and some recent results are presented.

Citation Download Citation

D. L. Spears "Theory And Status Of High Performance Heterodyne Detectors", Proc. SPIE 0300, Physics and Technology of Coherent Infrared Radar I, (30 April 1982); https://doi.org/10.1117/12.932589

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