Coherent laser radar systems in the mid-IR wavelength region can have advantages in low-altitude environments because they are less sensitive to scattering, turbulence, and humidity, which can affect shorter- or longer-wavelength systems. We describe a coherent laser radar at 3.6 μm based on a single-frequency optical parametric oscillator and demonstrate the system over short ranges outdoors. The system was used to make micro-Doppler measurements from idling trucks that were processed to give surface vibration spectra.
© 2002 Optical Society of America
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.3340) Remote sensing and sensors : Laser Doppler velocimetry
(280.3640) Remote sensing and sensors : Lidar
Frank Hanson and Mark Lasher, "Coherent laser radar at 3.6 μm," Appl. Opt. 41, 7689-7693 (2002)