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Answer:
Dr. Kazuyuki Hirao kindly answered this question:
 It is expected that the light energy of
the laser could be converted into
heat when it is irradiated on the surface of glass, causing the glass to
expand and then to break. Fused silica is glass which has the lowest
coefficient of thermal expansion, so in this case, the power of the
laser would be too high.
The
OH group is called the hydroxyl group. This bond exists when there is
water inside glass, according to this reaction, SiO2 + H2O
↔
Si-OH + HO-Si.
However, this is not the case in fused silica, where there is little
water inside. The cell is sometimes broken when there is dust on the
surface of the cell, where the heat of the scattered light is pooled.
It would be a good idea to move the focus of the laser from the surface
to the inside of the cell using a converging lens.
Acknowledgement
Dr. Kazuyuki Hirao
He is studying the combination of lasers and glass, a new
field with potential application to many other fields.
This article is translated by Chemistryquestion.com from the original article in Chemistryquestion.jp. Please let us know if you find any errors.
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