Self-mixing detector candidates for an FM/cw ladar architecture

William C. Ruff; John D. Bruno; Stephen W. Kennerly; Ken Ritter; Paul H. Shen; Barry L. Stann; Michael R. Stead; Zoltan G. Sztankay; Mary S. Tobin

doi:10.1117/12.397787

5 September 2000 Self-mixing detector candidates for an FM/cw ladar architecture

William C. Ruff, John D. Bruno, Stephen W. Kennerly, Ken Ritter, Paul H. Shen, Barry L. Stann, Michael R. Stead, Zoltan G. Sztankay, Mary S. Tobin

Author Affiliations +

Proceedings Volume 4035, Laser Radar Technology and Applications V; (2000) https://doi.org/10.1117/12.397787
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

The U.S. Army Research Laboratory (ARL) is currently investigating unique self-mixing detectors for ladar systems. These detectors have the ability to internally detect and down-convert light signals that are amplitude modulated at ultra-high frequencies (UHF). ARL is also investigating a ladar architecture based on FM/cw radar principles, whereby the range information is contained in the low-frequency mixing product derived by mixing a reference UHF chirp with a detected, time-delayed UHF chirp. When inserted into the ARL FM/cw ladar architecture, the self-mixing detector eliminates the need for wide band transimpedance amplifiers in the ladar receiver because the UHF mixing is done internal to the detector, thereby reducing both the cost and complexity of the system and enhancing its range capability. This fits well with ARL's goal of developing low-cost, high-speed line array ladars for submunition applications and extremely low-cost, single pixel ladars for ranging applications. Several candidate detectors have been investigated for this application, with metal-semiconductor-metal (MSM) detectors showing the most promise. This paper discusses the requirements for a self-mixing detector, characterization measurements from several candidate detectors and experimental results from their insertion in a laboratory FM/cw ladar.

Citation Download Citation

William C. Ruff, John D. Bruno, Stephen W. Kennerly, Ken Ritter, Paul H. Shen, Barry L. Stann, Michael R. Stead, Zoltan G. Sztankay, and Mary S. Tobin "Self-mixing detector candidates for an FM/cw ladar architecture", Proc. SPIE 4035, Laser Radar Technology and Applications V, (5 September 2000); https://doi.org/10.1117/12.397787

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