Estimation of laser-induced damage depth from surface image features.
Applied Optics
|May 3, 2023
Summary
This study introduces a new method to measure laser-induced damage depth in fused silica, accounting for bulk growth. The technique uses scattered light intensity to accurately estimate damage volume, improving laser optics diagnostics.
Area of Science:
- Materials Science
- Optics
- Laser Physics
Background:
- Current laser damage assessment in fused silica relies on surface imaging, neglecting bulk morphology.
- Damage depth is often assumed proportional to surface diameter, which is inaccurate for bulk-growing sites.
Purpose of the Study:
- To propose an accurate estimator for laser damage depth in fused silica optics.
- To address limitations of surface-based measurements for bulk damage growth.
Main Methods:
- Utilizing scattered light intensity as a proxy for damage volume.
- Developing a novel depth estimator based on pixel intensity analysis.
- Monitoring damage depth changes during successive laser irradiations.
Main Results:
- The proposed estimator accurately tracks damage depth, even during phases of uncorrelated surface and bulk growth.
- Scattered light intensity is shown to be proportional to damage volume.
- The method provides a more comprehensive understanding of laser-induced damage progression.
Conclusions:
- A new, accurate method for estimating laser damage depth in fused silica is presented.
- This technique improves the characterization of laser damage in optical materials.
- The findings are crucial for advancing laser optics performance and durability.
