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Laser echo signal amplification in a turbulent atmosphere
Applied Optics
|September 15, 2015
Summary
This study introduces a lidar system to measure atmospheric turbulence effects on laser signals. Experiments show the axial channel typically records stronger signals than the non-axial channel due to backscatter amplification.
Area of Science:
- Atmospheric Optics
- Remote Sensing
- Laser Physics
Background:
- Turbulent atmospheres can distort and amplify laser signals.
- Backscatter amplification is a phenomenon affecting laser return signals.
Purpose of the Study:
- To develop and evaluate a lidar system for measuring laser return amplification.
- To quantify the effect of atmospheric turbulence on lidar signals using a dual-channel system.
Main Methods:
- Utilized a lidar system with two receiving channels: axial and non-axial.
- Measured the power ratio of echo signals between the axial and non-axial channels.
- Conducted long-duration atmospheric experiments.
Main Results:
- The power ratio serves as a measure of backscatter amplification.
- Echo signal power in the axial channel usually exceeds that in the non-axial channel.
- Demonstrated the influence of atmospheric turbulence on lidar return signals.
Conclusions:
- The proposed lidar system effectively registers laser return amplification.
- The axial channel's higher signal power indicates significant backscatter amplification in turbulent atmospheres.
