Related Experiment Video
Updated: Jun 22, 2026
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Novel polarization-sensitive micropulse lidar measurement technique
Optics Express
|June 18, 2009
Summary
This study introduces polarization-sensitive detection for atmospheric lidar, enabling better identification of cloud phase and aerosols. The new method uses actively controlled polarization to measure depolarization ratios, improving atmospheric research capabilities.
Area of Science:
- Atmospheric optics
- Remote sensing
- Lidar technology
Background:
- Polarization-sensitive detection of backscattered light is crucial for identifying cloud phase and depolarizing aerosols.
- The Atmospheric Radiation Measurement Program has utilized micropulse lidar (MPL) for over a decade, lacking polarized detection capabilities.
Purpose of the Study:
- To enhance micropulse lidar (MPL) by incorporating polarization-sensitive detection.
- To enable the identification of depolarizing particles by analyzing backscattered light polarization.
Main Methods:
- Implemented an actively-controlled liquid crystal retarder in the micropulse lidar (MPL).
- Alternately transmitted linearly and circularly polarized light.
- Utilized Mueller matrix calculations to derive depolarization ratios.
Main Results:
- Successfully introduced a novel method for polarization-sensitive lidar measurements.
- Established simple relationships between linear, circular, and MPL depolarization ratios.
- Demonstrated capability to distinguish depolarizing particles.
Conclusions:
- The developed technique offers a departure from traditional lidar methods by using actively controlled polarization states.
- This advancement improves the characterization of atmospheric particles and cloud properties.
- The findings are valuable for atmospheric research and climate modeling.
