Lasers blow a bigger bubble

Article Abstract:

Researchers from the University of Gottingen fired an infrared laser pulse in some water. A bubble of water expanded to a diameter of three millimeters as it filled with dissolved gas and water vapour. The pressure outside the bubble was greater than inside and the bubble imploded. When it imploded, the researchers observed 3x10 to the power of seven photons. The gas in the bubble heats up to several thousand kelvin when it is compressed and this causes light to be emitted. This phenomenon has been observed by Russian scientists but accurate measurements could not be made.

Research, Usage, Laser pulses, Ultrashort, Ultrashort laser pulses

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Does the proof stack up?

Article Abstract:

This article discusses the peer review system and how it has failed to deliver the results in a timely fashion. Case in point is a story about a mathematician's theory about stacking spheres. The peer review took four years to finish their job. The theory pyramid power may have to wait for verification by the computers.

Product information, Evaluation, Brief Article, Testing, Mathematical models, Peer review

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Recent developments in compact ultrafast lasers

Article Abstract:

The author reviews the publications on ultrafast lasers. The topics include the applications of these lasers, Ti:sapphire laser and Kerr lens modelocking, and semiconductor saturable absorbers.

Lasers, Analysis, Composition, Optical properties, Absorption, Properties, Semiconductors (Materials), Laser

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