Thermal Analysis of Multi-Pass Laser Irradiation on Fused Silica

Abstract:

A rough ground fused silica surface can be ground in a ductile mode by ultra-precision grinding after repairing the surface and subsurface micro cracks (SSMC) by CO2 laser irradiation. In this paper, 2D finite element thermal analysis of unidirectional multi-pass laser irradiation on fused silica was conducted, and the simulation results were compared with the thermal analysis and experiments results of single pass laser irradiation. Thermal analysis results show that the SSMC on the ground fused silica can be repaired and surface roughness can be decreased simultaneously by unidirectinal laser raster scan with a power of 10.5 W, a scan velocity of 0.2 m/s and a scan spacing of 40 μm.

• Periodical: Advanced Materials Research (Volume 565)
• Pages: 621-626
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.565.621
• Online since: September 2012
• Authors: Peng Yao, Chuan Zhen Huang, Jun Wang, Tunemoto Kuriyagawa
• Keywords: CO₂ Laser Irradiation, Fused Silica, Raster Scan, Repair, Subsurface Micro Cracks, Surface Micro Cracks, Thermal Analysis

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