News tagged with laser beam

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What is the geometry of the universe?

One of the big questions in cosmology regards the shape of the universe. "Shape" in this case is not the distribution of galaxies, but rather the shape of space and time itself. In general relativity, space and time can be ...

dateSep 24, 2014 in Astronomy
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Laser makes microscopes way cooler

(Phys.org) —Laser physicists have found a way to make atomic-force microscope probes 20 times more sensitive and capable of detecting forces as small as the weight of an individual virus.

dateAug 15, 2014 in Optics & Photonics
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Creating optical cables out of thin air

Imagine being able to instantaneously run an optical cable or fiber to any point on earth, or even into space. That's what Howard Milchberg, professor of physics and electrical and computer engineering at the University of ...

dateJul 22, 2014 in Optics & Photonics
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Deformable mirror corrects errors

Very high power is needed to cut or weld using a laser beam. But this creates its own problem: the beam's energy deforms the mirrors that are focusing it to a point. When this happens, the beam expands and loses intensity. ...

dateMay 14, 2014 in Optics & Photonics
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