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Related Experiment Video

Updated: May 30, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Published on: October 18, 2010

Coherent laser radar at 3.6 microm.

Frank Hanson¹, Mark Lasher

¹Space and Naval Warfare Systems Center, Code 2853, 53490 Dow Street, San Diego, California 92152, USA. hansonfe@spawar.navy.mil

|January 4, 2003

Summary

Mid-infrared coherent laser radar offers advantages in challenging environments. This study demonstrates a 3.6-micrometer system for outdoor micro-Doppler measurements, revealing truck surface vibration spectra.

Area of Science:

Optics and Photonics
Remote Sensing
Vibration Analysis

Background:

Coherent laser radar (LIDAR) systems are sensitive to environmental factors like scattering, turbulence, and humidity.
Mid-infrared (mid-IR) wavelengths offer potential advantages over shorter or longer wavelengths in adverse atmospheric conditions.

Purpose of the Study:

To describe a novel coherent laser radar system operating in the mid-IR wavelength region.
To demonstrate the system's capability for outdoor measurements and micro-Doppler analysis.

Main Methods:

Development of a single-frequency optical parametric oscillator for mid-IR laser generation.
Outdoor field demonstration of the coherent laser radar system at 3.6 micrometers.
Acquisition and processing of micro-Doppler signals from idling trucks.

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Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

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Published on: October 18, 2010

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

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$Femtosecond Laser Filaments for Use in Sub-Diffraction-Limited Imaging and Remote Sensing$

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Published on: April 25, 2019

Main Results:

Successful demonstration of a 3.6-micrometer coherent laser radar system over short outdoor ranges.
Acquisition of micro-Doppler measurements from idling trucks.
Generation of surface vibration spectra from the processed micro-Doppler data.

Conclusions:

Coherent laser radar in the mid-IR is viable for outdoor sensing applications.
The developed system can effectively measure micro-Doppler shifts to characterize surface vibrations.