Ultrafast InGaAs pin detector for eye-safe lidar

Frank J. Effenberger; Abhay M. Joshi

doi:10.1117/12.327189

8 September 1998 Ultrafast InGaAs pin detector for eye-safe lidar

Proceedings Volume 3380, Laser Radar Technology and Applications III; (1998) https://doi.org/10.1117/12.327189
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

Eyesafe LIDAR systems require detectors that operate in the 1.55 micron band with high bandwidth and large area. This paper describes the three design methods used in developing such detectors. First, a thick dual-depletion width pin structure is optimized for low capacitance and transit time. This enables the detector itself to have the best intrinsic speed. Second a extra-low input impedance preamplifier is designed. This preamplifier improves the performance of the already fast pin by lowering the electrical time-constants of the readout. Third, a novel partitioned detector layout is developed. This technique allows the connection of a large number of small, high-speed segments in parallel to form a single large detector. When used in combination, these design methods can produce a new class of detectors with diameters greater than 1 mm and bandwidths greater than 4 GHz.

Citation Download Citation

Frank J. Effenberger and Abhay M. Joshi "Ultrafast InGaAs pin detector for eye-safe lidar", Proc. SPIE 3380, Laser Radar Technology and Applications III, (8 September 1998); https://doi.org/10.1117/12.327189

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