In-situ Raman spectroscopic measurements of the deformation region in indented glasses

Gerbig, Y.; Michaels, Chris A.

doi:10.1016/j.jnoncrysol.2019.119828

Cited by 14 publications

(10 citation statements)

References 77 publications

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“…Figure 3B shows that broad Raman bands can be observed in the AGF, indicating its amorphous state. The peaks at 451 and 993 cm −1 can be assigned to the stretching or bending modes of Si–O–Si 34,35 . The peaks at 767 and 1437 cm −1 are derived from the stretching mode of BO 4 and BO 3 , respectively 36,37 .…”

Section: Resultsmentioning

confidence: 99%

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Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers

et al. 2022

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Ultrafast fiber lasers, due to their short pulse duration, excellent beam quality, and high brightness, are extensively used in precision processing, biomedicine, nonlinear optics, and spectroscopy. However, great challenges still exist in improving the optical conversion efficiency in glass‐based gain media because of the high non‐radiative transition probability. Here, we demonstrate an oxyfluoride glass–ceramic (GC) fiber containing NaYF4:Yb3+ nanocrystal that enables enhanced 1064‐nm continuous‐wave laser output with an optical signal‐to‐noise ratio of 60 dB. Compared with the as‐prepared glass fiber, the optical conversion efficiency of GC fiber is improved from 24.2% to 30.0%. The improvement of laser action is mainly caused by the preferential incorporation of Yb3+ into the NaYF4 nanocrystal with low phonon energy. Using this well‐developed GC fiber, we successfully built a passively mode‐locked pulsed fiber laser that deliveries laser pulses with a pulse duration of 8.1 ps and a repetition frequency of 56.92 MHz. These results highlight that the GC strategy may provide a roadmap for the development of ultrafast fiber laser and the application of GC fibers in various optoelectronic fields.

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Section: Resultsmentioning

confidence: 99%

“…The peaks at 451 and 993 cm −1 can be assigned to the stretching or bending modes of Si-O-Si. 34,35 The peaks at 767 and 1437 cm −1 are derived from the stretching mode of BO 4 and BO 3 , respectively. 36,37 In comparison, a new Raman band at 262 cm −1 appears in the GCFs, which can be ascribed to the vibrational mode of NaYF 4 crystal.…”

Section: Resultsmentioning

confidence: 99%

Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers

et al. 2022

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“…The other major area of advancement in in situ understanding relates to the response of glass to an external force while undergoing indentation. In situ studies of the affected area beneath an indenter 44–46 have shown structural changes supporting a better understanding of damage mechanics in glasses being designed for mobile consumer electronics and other applications. The field of glass mechanics is still very much in its infancy, especially when considering the need for these types of in situ analyses.…”

Section: Enabling Development and Application Of Technical Glassesmentioning

confidence: 93%

A Corning perspective on the future of technical glass in our evolving world

Kohli

Hubert

Youngman

et al. 2022

Int J of Appl Glass Sci

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Glass is a material with a rich history and a bright future. Due to its outstanding properties and its versatility, it is a key material in many applications. In this paper, we present a variety of these applications in which glass is playing, and will continue to play, a significant role, including communication technologies, the semiconductor industry, advanced displays, mobile consumer electronics, healthcare, and automotive. Other critical considerations enabling continuous progress in glass science and engineering, such as improved modeling tools and characterization techniques, increased sustainability of the glass-making process, and talent development, are also discussed.

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“…57) As for in-situ Raman spectroscopy of glass during the indentation, the present author and his colleagues fabricated a custom indenter for Raman measurements, and reported remarkable peak broadening of Raman spectrum of silica glass under a Vickers indenter. 58) The recent work 59) also showed the peak broadening of silica glass, although the authors of the paper alerted to the problem that the in-situ Raman spectra include spectral contribution of the indenter and that the ratio of the analyzed volume by Raman spectroscopy to the volume deformed by indentation must affect both the peak shape and the peak position. Nevertheless, the peak broadening is one of the characteristic features of glass under the indenter, because it cannot be observed in hydrostatic compressed silica glass under an elastic regime.…”

Section: Future Perspective For Development Of High-crack-resistant Glassmentioning

confidence: 99%

Compositional variation of indentation-induced deformation and cracking in glass

Yoshida¹

2020

J. Ceram. Soc. Japan

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The indentation test using a sharp diamond indenter, such as a Vickers indenter, has been long employed for comparing mechanical properties among various glass compositions, because of its simple procedure and easy operation. However, mechanisms of permanent deformation and crack nucleation in glass are far from simple. This has made it difficult to understand what controls the threshold load for cracking in a certain glass during indentation. In this review, the author's works on indentation-induced deformation and cracking in glass are introduced, and relevant issues on the indentation technique are discussed. Especially, it is pointed out that permanent densification of glass under the indenter is a key phenomenon which controls the following cracking event. Further, it is also shown that the micro-photoelastic observation system, by which the indentation-induced stress field can be visualized, and the indentation microscope, which enables one to measure the contact area between glass and the indenter, are powerful tools to stimulate new and fresh ideas for improving mechanical properties of glass.

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In-situ Raman spectroscopic measurements of the deformation region in indented glasses

Cited by 14 publications

References 77 publications

Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers

Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers

A Corning perspective on the future of technical glass in our evolving world

Compositional variation of indentation-induced deformation and cracking in glass

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In-situ Raman spectroscopic measurements of the deformation region in indented glasses

Cited by 14 publications

References 77 publications

Intense continuous‐wave laser and mode‐locked pulse operation from Yb3+‐doped oxyfluoride glass–ceramic fibers

Intense continuous‐wave laser and mode‐locked pulse operation from Yb3+‐doped oxyfluoride glass–ceramic fibers

A Corning perspective on the future of technical glass in our evolving world

Compositional variation of indentation-induced deformation and cracking in glass

Contact Info

Product

Resources

About

Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers

Intense continuous‐wave laser and mode‐locked pulse operation from Yb³⁺‐doped oxyfluoride glass–ceramic fibers