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Femtosecond laser-induced damage characteristics of mid-infrared oxyfluorogallate glass.
- Source :
-
Optics & Laser Technology . Jan2019, Vol. 109, p659-665. 7p. - Publication Year :
- 2019
-
Abstract
- Highlights • A novel oxyfluorogallate glass with good mid-infrared property was provided. • Femtosecond surface damage characteristics of oxyfluorogallate glass are investigated. • Femtosecond nonlinear effect is studied to explain the damage mechanism. • Surface damage thresholds show an evident reduction as pulses number increasing. • No changes on the chemistry structure occur after femtosecond laser ablation. Abstract The femtosecond laser-induced damage characteristics of a novel oxyfluorogallate glass with good mid-infrared property are analyzed in detail and the surface-damage thresholds for single- and multi- pulses ablation are determined and an evident reduction trend is obtained. The nonlinear absorption coefficient measured through the femtosecond laser z-scan method is used to explain the damage mechanism according to the calculation of Keldysh parameter. The ablation characteristics of the oxyfluorogallate glass demonstrated a clear evidence of melting and the ablation rate decreased in the presence of the melting phenomenon. Based on subsequent X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy analyses, the chemistry of the mid-infrared oxyfluorogallate glass appeared to remain constant before and after femtosecond laser ablation. This work provides a reference to manufacture infrared optical devices and is useful in promoting the application of the mid-infrared glass material. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FEMTOSECOND lasers
*FRACTURE mechanics
*GALLATES
*METALLIC glasses
*LASER ablation
Subjects
Details
- Language :
- English
- ISSN :
- 00303992
- Volume :
- 109
- Database :
- Academic Search Index
- Journal :
- Optics & Laser Technology
- Publication Type :
- Academic Journal
- Accession number :
- 131772451
- Full Text :
- https://doi.org/10.1016/j.optlastec.2018.09.001