Surface evolution and laser damage resistance of CO2 laser irradiated area of fused silica

Dai, Weizhong; Xi, Xiang; Jiang, Yong; Wang, H.J.; Li, X.B.; Yuan, Xiaodong; Zheng, Wanguo; Lv, Hualiang; Zu, Xiaotao

doi:10.1016/j.optlaseng.2010.10.001

Cited by 57 publications

(26 citation statements)

References 18 publications

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“…A CO 2 laser beam can also be used for texturing the surface of optical glasses, as demonstrated by Shiu et al (1999) and Bennett et al (1999), or even for repairing of damage in fused silica components by re-melting, as reported by Mendez et al (2006) and Cormont et al (2013). Moreover, Brusasco et al (2001) and recently Dai et al (2011) demonstrated that CO 2 laser polishing can also enhance surface damage resistance of optical components.…”

Section: Introductionmentioning

confidence: 90%

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Wlodarczyk

Ardron

Waddie

et al. 2015

Journal of Materials Processing Technology

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a b s t r a c tWe report the development of a laser-based process for the direct writing ('microsculpting') of unique security markings (reflective phase holograms) on the surface of metals. In contrast to the common approaches used for unique marking of the metal products and components, e.g., polymer holographic stickers which are attached to metals as an adhesive tape, our process enables the generation of the security markings directly onto the metal surface and thus overcomes the problems with tampering and biocompatibility which are typical drawbacks of holographic stickers. The process uses 35 ns laser pulses of wavelength 355 nm to generate optically-smooth deformations on the metal surface using a localised laser melting process. Security markings (holographic structures) on 304-grade stainless steel surface are fabricated, and their resulted optical performance is tested using a He-Ne laser beam of 632.8 nm wavelength.

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Section: Introductionmentioning

confidence: 90%

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Wlodarczyk

Ardron

Waddie

et al. 2015

Journal of Materials Processing Technology

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“…As such the fibre end-face takes on a rounded shape that is unsuitable for splicing [8]. Our technique leaves no cleave initiation point, misting or hackle features, which have been shown to lead to scattering losses and reduced fibre damage thresholds [9][10][11]. We also report for the first time, to the best of our knowledge, the challenges associated with the controlled CO 2 laser ablation of fibres that have multiple layers of doped and un-doped glass and non-circular designs.…”

Section: End Face Processingmentioning

confidence: 99%

Advances in CO₂ laser fabrication for high power fibre laser devices

et al. 2016

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“…The irradiated area can be divided into the distorted zone and the laser affected zone. 12 The red dotted circle in Fig. 1(b) is the boundary of the laser distorted zone.…”

Section: Hoop Stressmentioning

confidence: 99%

“…[10][11][12] The general explanation of the formation of the residual stress involves three steps: (a) temperature gradient formed at the initial stage of irradiation, (b) thermal expansion during laser irradiation due to the positive thermal expansion coefficient of fused silica, and (c) elastic and plastic deformation appearing after the lasers are turned off. Several numerical models have also been presented to simulate the evolution of the fictive temperature and stress field with the finite element method, 9,13-15 such as tool-Narayanaswamy relaxation model, 9 elastoviscoplastic deformation model, 13 and thermomechanical model.…”

Section: Introductionmentioning

confidence: 99%

Quantitative measurement of CO₂laser-induced residual stress in fused silica optics

et al. 2015

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Abstract. The residual stress field of fused silica induced by continuous wave CO 2 laser irradiation is investigated with specific photoelastic methods. Both hoop stress and axial stress in the irradiated zone are measured quantitatively. For the hoop stress along the radial direction, the maximum phase retardance of 30 nm appears at the boundary of the laser distorted zone (680-μm distance to center), and the phase retardance decreases rapidly and linearly inward, and decreases slowly and exponentially outward. For the axial stress, tensile stress lies in a thin surface layer (<280 μm) and compressive stress lies just below the tensile region. Both tensile and compressive stresses increase first and then decrease along the depth direction. The maximum phase retardance induced by axial tensile stress is 150 nm, and the maximum phase retardance caused by axial compression stress is about 75 nm. In addition, the relationship between the maximum axial stress and the deformation height of the laser irradiated zone is also discussed.

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Surface evolution and laser damage resistance of CO2 laser irradiated area of fused silica

Cited by 57 publications

References 18 publications

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Advances in CO₂ laser fabrication for high power fibre laser devices

Quantitative measurement of CO₂laser-induced residual stress in fused silica optics

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Surface evolution and laser damage resistance of CO2 laser irradiated area of fused silica

Cited by 57 publications

References 18 publications

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Laser microsculpting for the generation of robust diffractive security markings on the surface of metals

Advances in CO2 laser fabrication for high power fibre laser devices

Quantitative measurement of CO2laser-induced residual stress in fused silica optics

Contact Info

Product

Resources

About

Advances in CO₂ laser fabrication for high power fibre laser devices

Quantitative measurement of CO₂laser-induced residual stress in fused silica optics