A detailed schematic of Prof. Chang's attosecond optical pulse generator. In this case, the attosecond pulses are formed by nonlinear interaction with a neon jet
Prof. Chang's attosecond optical pulse generator
Simplified schematic of Chang's attosecond optical pulse generator. Nonlinear interaction of the focused femtosecond pulses with the inert gas in the cell shortens the input pulses by a factor of a thousand.
Chang's new laser system which will generate 5 femtosecond pulses with 150 millijoules energy per pulse
Data contrasting the pulse characterization of Chang's PROOF technique with the standard technique
Professor Zenghu Chang with his ultrashort laser pulse apparatus
Since first invented, the effort to make lasers that can produce shorter and more powerful pulses of light has been a very active one. One driving force is that if you want to take a picture of something occurring very rapidly, you need a very short pulse of light to prevent the image from blurring. The first ruby laser produced microsecond pulses of light, but more recently femtosecond optical pulses a billion times shorter have become common. Still shorter pulses belong to the attosecond regime - the regime wherein a University of Central Florida research team is creating optical pulses sufficiently brief to stop quantum mechanics in its tracks.
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