Influence of subsurface defects on damage performance of fused silica in ultraviolet laser

Huang, Jin; Zhou, Xinda; Liu, Hongjie; Wang, Fengrui; Jiang, Xiaodong; Wu, Weidong; Tang, Yongjian; Zheng, Wanguo

doi:10.1117/1.oe.52.2.024203

Cited by 17 publications

(8 citation statements)

References 10 publications

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“…It has been determined that these imperfections are responsible for the majority of laser-induced damage for fluences typically used in ICF class lasers. In addition, the metal impurity elements in the polishing layer and the structural parameters of scratches are major factors that affect the damage performance of optical components [12].…”

Section: Damage Initiatormentioning

confidence: 99%

Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

et al. 2013

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A novel oxyfluoride glass (OFG) was prepared. The laser induced damage threshold (LIDT) of the novel OFG is 24.9% higher than fused silica under 355nm nanosecond laser irradiation by R-on-1 procedure. Characterization by optical microscope and scanning electron microscope shows that the initial damage morphologies of two kind of materials are significantly different. Experiment results indicate that the novel OFG can be a good candidate component material for high energy laser applications.

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Section: Damage Initiatormentioning

confidence: 99%

Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

et al. 2013

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“…However, the laser induced-damage initiation on fused silica optics limits the performance of high-power laser applications [3]. In the previous study, some researchers have shown that sub-surface damage (SSD)is likely to be laser damage precursors [4]. It can cause laser damage susceptibility regionally, enhance laser absorption, and then introduce macroscopic damage to optics [5,6].…”

Section: Introductionmentioning

confidence: 99%

High-Efficiency and Low-Damage Lapping Process Optimization

et al. 2020

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The silica opticsare widely applied in the modern laser system, and its fabrication is always the research focus. In the manufacturing process, the lapping process occurs between grinding and final polishing. However, lapping processes optimizations focus on decreasing the depth of sub-surface damage (SSD) or improving lapping efficiency individually. So, the optimum balance point between efficiency and damageshould be studied further. This manuscript establishes the effective removal rate of damage (ERRD)model, and the relationship between the ERRD and processing parameters is simulated. Then, high-efficiency, low-damage lapping processing routine is established based on the simulation. The correctness and feasibility are validated. In this work, the optimized method is confirmed that it can improve efficiency and decrease damage layer depth in the lapping process which promotes the development of optics in low-damage fabrication.

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“…Ultra-smooth and high-damage-threshold optics is largely demanded in high power laser systems (such as NIF in the U.S., or the SG-III Facility in China) [1,2]. However, researches indicate that the subsurface damage (SSD) generated during grinding and polishing plays a key role in reducing the laser-induced damage threshold (LIDT) [3][4][5][6]. It leads to having the service life of optical elements to decrease notably.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Evaluation of Subsurface Damage by Improved Total Internal Reflection Microscopy

Cheng

Huang

et al. 2019

Applied Sciences

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Subsurface damage (SSD), having a great impact on the laser-induced damage threshold (LIDT) of ultra-smooth optics applied in high-power laser systems, should be tightly controlled. An improved total internal reflection microscopy (TIRM), combined with digital image processing techniques, is proposed to quantitatively inspect SSD. With the characteristic that there is a relatively small depth of field (DOF) for a microscope at high magnification (50×), a series of SSD images are captured along with the microscope focusing at different depths under the surface by means of micro-focusing control. The definition of each image is calculated through wavelet transformation. By simulation, the relationship between the definition of TIRM images and the depth of the SSD has been established. According to the definition curve, the SSD depth is acquired. Fused silica glasses polished after fine grinding are measured non-destructively by our TIRM setup. The results show that the improved TIRM is a useful method to evaluate SSD. It is helpful to improve the efficiency of optical fabrication.

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Influence of subsurface defects on damage performance of fused silica in ultraviolet laser

Cited by 17 publications

References 10 publications

Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

Comparison of fused silica and oxyfluoride glass on laser induced initial damage morphology

High-Efficiency and Low-Damage Lapping Process Optimization

Quantitative Evaluation of Subsurface Damage by Improved Total Internal Reflection Microscopy

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