Darkening enhancement in SK3 glass with quartz under irradiation of femtosecond laser pulses
✍ Scribed by Kazem Jamshidi-Ghaleh; Erik S. Lotfi; Hossein Masalehdan
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 388 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0143-8166
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✦ Synopsis
In this paper, the femtosecond laser-induced darkening in SK3 glass is investigated. A sample with 3-mm thickness is irradiated with 200 fs laser pulses (FLP) at 800 nm wavelength and 1 kHz repetition rate. When a piece of quartz or sapphire, which does not show darkening effect under IR irradiations, is placed in front of the sample, the laser-induced darkening is enhanced. The directly darkened region in the sample gets darker on placing a piece of quartz or sapphire in front of the sample. When a piece of ULE glass that shows darkening effect by IR-FLP irradiations is placed in front of the sample, SK3 sample does not get that dark. We believe the enhancement of the darkening in SK3 glass sample by the quartz or sapphire is related to the absorption of the short wavelength component of the white light, which is generated and not absorbed in the quartz or sapphire.