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Robust detection of a rotational Doppler shift with randomly fluctuated light
Optics Letters
|August 2, 2024
Summary
Partially coherent light sources improve rotational Doppler detection in complex environments by overcoming issues caused by obstruction and turbulence. This enhances velocity metrology applications.
Area of Science:
- Optics and Photonics
- Metrology
- Laser Physics
Background:
- Rotational Doppler detection is limited by environmental factors like obstruction and turbulence.
- Partially coherent light manipulation can mitigate environmental perturbations.
Purpose of the Study:
- To investigate the use of a partially coherent light source for rotational Doppler frequency shift detection.
- To compare its performance against a fully coherent source under adverse conditions.
Main Methods:
- Constructed a partially coherent source with a petal-like focal field distribution.
- Performed rotational Doppler detection experiments under simulated obstruction and turbulence.
- Compared results with a fully coherent light source.
Main Results:
- The partially coherent source effectively addressed frequency-shift broadening caused by obstruction-induced information loss.
- It also mitigated broadening due to turbulence-induced beam misalignment.
- Performance was superior to the fully coherent counterpart in complex environments.
Conclusions:
- Partially coherent light sources offer a robust solution for rotational Doppler detection in challenging environments.
- This approach enhances the applicability of velocity metrology in real-world scenarios.
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