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Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
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Waterproof coatings for high-power laser cavities
Xinbin Cheng1,2,3, Siyu Dong1,2, Song Zhi1,2
1MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai, 200092 China.
Light, Science & Applications
|January 25, 2019
Summary
Novel waterproof coatings protect delicate laser media from water erosion. These HfSiO2/SiO2 nanocomposite coatings offer excellent thermal control for high-power laser systems.
Area of Science:
- Materials Science
- Optics and Photonics
- Laser Technology
Background:
- Effective thermal management is crucial for high-power lasers due to increasing power and repetition rates.
- Water cooling offers superior waste heat removal compared to air cooling or bonded heat sinks.
- Protecting water-sensitive laser media from water erosion is a significant challenge in implementing water cooling.
Purpose of the Study:
- To develop novel waterproof coatings for protecting deliquescent laser media, specifically Nd:Glass, from water erosion.
- To investigate the relationship between coating microstructure, pore characteristics, and waterproof properties.
- To create multifunctional coatings with high laser-induced damage threshold (LIDT) and good spectral performance for laser applications.
Main Methods:
- Synthesis of HfSiO2/SiO2 nanocomposite coatings using an ion-assisted co-evaporation process.
- Characterization of single-layer coating microstructures and pore properties to understand waterproof mechanisms.
- Evaluation of the waterproof property, LIDT, and spectral performance of the developed multifunctional coatings.
Main Results:
- Clarified the dependence of waterproof properties on the microstructure and pore characteristics of single-layer coatings.
- Successfully synthesized Hf0.7Si0.3O2/SiO2 nanocomposite coatings with a dense amorphous microstructure and wide bandgap.
- Demonstrated excellent waterproof performance, high LIDT, and good spectral characteristics for the multifunctional coatings.
Conclusions:
- The developed HfSiO2/SiO2 multifunctional coatings effectively shield Nd:Glass from water erosion.
- These coatings provide a viable solution for thermal control in high-power laser cavities.
- The research contributes enabling components for advanced laser system design and performance.
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