Parametric Study of a 10.6-micro Laser Radar.

Area of Science:

• Optical Engineering
• Remote Sensing
• Laser Technology

Background:

• Laser radar (LIDAR) systems are crucial for remote sensing applications.
• Understanding performance limitations and environmental effects is key for accurate measurements.
• Heterodyne detection offers high sensitivity in laser radar systems.

Purpose of the Study:

• To conduct a parametric study of a 10.6-micrometer laser radar system.
• To evaluate system performance with noncooperative targets at extended ranges.
• To investigate atmospheric effects and target-induced phenomena on laser radar returns.

Main Methods:

• Utilized a 10.6-micrometer laser radar with heterodyne detection and an offset local oscillator.
• Acquired data from various noncooperative targets up to 8 km.
• Measured signal-to-noise ratio, scattering coefficients, depolarization, scintillation, and frequency broadening.

Main Results:

• System performance is within a factor of 4 of quantum-limited operation.
• Scattering coefficients varied from 1.05 x 10(-8) m(-1) to 4.21 x 10-(7) m-(1) with changing visibility.
• Target-induced scintillation was generally larger than atmospheric scintillation, which was less severe than for visible wavelengths.

Conclusions:

• The 10.6-micrometer laser radar system demonstrates robust performance for remote sensing.
• The study provides critical data on atmospheric and target interactions relevant to laser radar applications.
• The system's performance and the characterization of environmental effects validate its utility for various applications.