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Analysis of 1ω bulk laser damage in KDP
David A Cross1, Christopher W Carr
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA. cross22@llnl.gov
Applied Optics
|August 12, 2011
Summary
We developed a new method to measure laser-induced damage sites in KDP crystals. Damage site density is less sensitive to pulse duration at 1053 nm than at shorter wavelengths.
Area of Science:
- Materials Science
- Laser Physics
- Optics
Background:
- Laser-induced damage in KDP crystals is challenging to study due to discrete, microscopic damage sites.
- Understanding laser damage thresholds is crucial for high-power laser applications.
Purpose of the Study:
- To develop a method for directly measuring laser-induced damage site size and location in KDP.
- To investigate the influence of laser pulse duration on damage in KDP bulk at 1053 nm.
Main Methods:
- Developed a technique to quantify thousands of damage sites and their positions.
- Correlated damage site characteristics with specific laser parameters (pulse duration, wavelength).
Main Results:
- The density of 1053 nm laser-induced damage sites in KDP shows reduced sensitivity to pulse duration compared to 526 nm and 351 nm.
- The size of laser-induced damage sites in KDP appears independent of pulse duration across different wavelengths.
Conclusions:
- The developed method enables precise characterization of laser-induced damage in KDP.
- Pulse duration has a wavelength-dependent effect on laser-induced damage density in KDP bulk, with 1053 nm showing less sensitivity.
