Comparison of Coherent to Incoherent Detection at 2.09 Micrometers Using a Solid State Ladar System
Final rept. 27 Mar 1991-21 Sep 1993
WRIGHT LAB WRIGHT-PATTERSON AFB OH
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A 2.09 LADAR system has been built to compare coherent to incoherent detection. The 2.09 um wavelength is of interest for its high atmospheric transmission and because it is eye safe. The 2.09 um system presented within is capable of either a coherent or incoherent operational mode, is tunable in a small region around 2.09 um, and is being used to look at the statistical nature of the LADAR return pulses for typical glint and speckle targets. In order to compare coherent to incoherent detection the probability of detection will be investigated as the primary performance criterion of interest. The probability of detection is dependent on both the probability of false alarm and the probability density function representing the signal current output from the detector. These probability distributions are different for each detection technique and for each type of target. Furthermore, the probability of detection and the probability of false alarm are both functions of the dominating noise sources in the system. A description of the theoretical expectations of this system along with the setup of the LADAR system and how it is being used to collect data for both coherent and incoherent detection will be presented. Coherent detection, Incoherent detection, Lidar ladar.
- Lasers and Masers
- Optical Detection and Detectors
- Active and Passive Radar Detection and Equipment