Morphology and microstructure in fused silica induced by high fluence ultraviolet 3ω (355nm) laser pulses

Wong, Joe; Ferriera, J.L.; Lindsey, E. F.; Haupt, D. L.; Hutcheon, I. D.; Kinney, J.H.

doi:10.1016/j.jnoncrysol.2005.11.036

Cited by 125 publications

(64 citation statements)

References 29 publications

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“…The micrograph of Fig. 2a shows a 15 ns pulse damage site morphology characterized by a molten-like inner core surrounded by a fractured periphery, 16 and is representative of the other  raster scans. Figure 2b displays variations  AS-TO corresponding to Fig.…”

mentioning

confidence: 95%

Synchrotron radiation infrared microscopic study of non-bridging oxygen modes associated with laser-induced breakdown of fused silica

Matthews

Carr

Bechtel

et al. 2011

Applied Physics Letters

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Nanosecond pulse laser-driven optical breakdown at SiO2 surfaces as probed by synchrotron-based Fourier transform infrared (SRFTIR) and photoluminescence (PL) microscopies is presented. SRFTIR mapping of laser damage identified localized non-bridging Si-O vibrational modes at ∼950 cm−1 which became stiffer as 355 nm laser pulse lengths were increased from 5 to 20 ns. The bridging Si-O-Si transverse optic mode frequency varied significantly across damaged regions indicating a wide range of average bond angles, softening slightly with increasing pulse length. 355 nm-excited PL images of laser modified regions could be directly correlated with the structural modifications identified through SRFTIR.

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confidence: 95%

Synchrotron radiation infrared microscopic study of non-bridging oxygen modes associated with laser-induced breakdown of fused silica

Matthews

Carr

Bechtel

et al. 2011

Applied Physics Letters

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“…Laser damage sites are weak areas for laser-induced damage growth due to their morphologies [1]-microstructure, cracks, compaction layer, point defects and local chemistry-which locally enhance the laser absorption. The development of large aperture and high-power lasers such as the National Ignition Facility (NIF) and the Laser Megajoule (LMJ) requires the study of the laser damage growth at the surface of fused silica optics [2].…”

Section: Introductionmentioning

confidence: 99%

“…For a better comprehension of the growth mechanisms, let us describe first the damage morphology once a damage site is initiated with a first laser irradiation. Wong et al [1] observed two different regions: a central ''core'' located at the bottom of the damage crater characterized by a highly scattering, modified and densified material with numerous lightabsorbing defects and numerous cracks located below this layer; the edges of this crater are cleaved surfaces of mechanically damaged material with cracks that radiate toward the surface. By means of a time-resolved microscope system, Demos et al [9] studied the dynamics of energy deposition and the subsequent crack propagation.…”

Section: Introductionmentioning

confidence: 99%

Damage growth in fused silica optics at 351 nm: refined modeling of large-beam experiments

et al. 2013

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Up to now, laser damage growth on the exit surface of fused silica optics has been mainly considered as exponential, the growth coefficient depending essentially on fluence. From experiments with large beams carried out at 351 nm under nanosecond pulses, a statistical analysis is conducted leading to a refined representation of the growth. The effect of several parameters has been taken into account to describe precisely the growth phenomenon. The two principal parameters proved to be the mean fluence and the size of the damage sites. Nevertheless, contributions of other parameters have been estimated too: the number of neighbors around the damage site, the shot number, etc. From experimental results, a model smoothed on a statistical approach is developed that permits the description of a complete sequence of growth. To evaluate the relevance of the modeling approach, the occluded area estimated from modeling is compared with the ones experimentally measured. For this purpose, numerical growth methods have been developed too. It is shown that the approach outlined is appropriate for a more precise description of the growth.

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“…This observation requires that additional innate characteristics of the site, apart from surface diameter, govern growth behavior. To date it is unknown which damage site attributes lead to more aggressive growth; however, it has been observed that individual damage sites can substantially differ structurally, such as in crater morphology and surrounding crack network [ (Wong, Ferriera et al 2006), (Hu, Zhao et al 2010), (Carr, Matthews et al 2007), (Negres, Norton et al 2010)]. Furthermore, previous work has suggested an association between structural properties and propagation of flaws in glass [ (Hrma, Han et al 1988), (Dahmani, Lambropoulos et al 1999), (Matthews, Stolken et al 2009)].…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal anneal on growth behavior of laser-induced damage sites on the exit surface of fused silica

Raman¹,

Negres²,

Matthews³

et al. 2013

Opt. Mater. Express

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Thermal anneal is known to arrest the growth of laser-induced damage in optical materials. However, the response of the material which leads to this observed behavior is poorly understood. In this work, we investigate the effect of isothermal anneal at 1100°C for 12 hours on the growth rate of laser-induced damage sites in fused silica. Growth rate was significantly lower for annealed initiated damage sites than that for untreated sites. This decrease in growth rate was associated with the closure of small surface and subsurface cracks, suggesting that aggressive growth rate is due, at least in part, to subsurface fracture complexity.

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Morphology and microstructure in fused silica induced by high fluence ultraviolet 3ω (355nm) laser pulses

Cited by 125 publications

References 29 publications

Synchrotron radiation infrared microscopic study of non-bridging oxygen modes associated with laser-induced breakdown of fused silica

Synchrotron radiation infrared microscopic study of non-bridging oxygen modes associated with laser-induced breakdown of fused silica

Damage growth in fused silica optics at 351 nm: refined modeling of large-beam experiments

Effect of thermal anneal on growth behavior of laser-induced damage sites on the exit surface of fused silica

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