Laser drilling of a glass plate
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Uploader Comments (niels314159)
All Comments (13)
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@niels314159 The area closest to the hole is darkened, is that because of debris deposition or is that HAZ? Also what laser and which harmonic of it do you use? Ti:Sapph? In my experience for deep machining there is no substitute for linear absorption, 300fs @ 257 nm goes through 150 um of BK7 very nicely. Also good observation for the reason of debris formation. Any ideas how to combat this? There doesn't seem to be such a problem with linear absorption, but it makes all the difference for NIR.
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@niels314159 10,000,000,000,000W doesn't sound like much (sarcasm).
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waves not traveling through glass. instead heating it.
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how does it work? the glass heats up in tiny spots and cracks away?
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lazer drilling threw mans penis
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oh ya well chuck norris does it with his penis!
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I do this with my bare fist!!!
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how do you make this bigger and drill large holes in the ground and would it melt dirt into glass and i copyright the idea anyone who uses it for this pourpose has to pay me 5% of their profits from said product or some form of reparations as to be determined by me,but i will take a fair cut you will get most so if you have the means go ahead and use it for tunnel excavation
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do this with my fish tank!
inachu 3 years ago
it would take many hours to get through unless your fish tank has thin glass (~0.1mm). It would cost a lot as well. Think about it.
niels314159 3 years ago
Why is there so much debris? I thought femtosecond lasers were used because they made really clean cuts.
goldencricket 3 years ago
Debris are always present because total ablation occurs only in the centre of the focused beam. Energy density decreases exponentially from the beam centre, therefore there are always some area where material is not ablated but "torn" away. In my experiments the laser beam was focused slightly below the surface, therefore plasma generated inside was destroying glass explosively. The main point, though, is that glass is not overheated and no cracks wre observed.
niels314159 3 years ago
The amount of energy is enormous... hard to imagine (for me at least...)
eclipselight 3 years ago
Average power ~0.2 W (a light bulb in your room is ~60W). But peak power is quite large: 10KW applied to a very small spot (diameter ~2 microns) which gives at least 10,000,000,000,000 W per square centimeter...)
niels314159 3 years ago