Monday, February 27, 2012

Ultrashort pulse

In optics, an ultrashort beating of ablaze is an electromagnetic beating whose time continuance is of the adjustment of a femtosecond (10 − 15 second). Such pulses accept a broadband optical spectrum, and can be created by mode-locked oscillators. They are frequently referred to as ultrafast events.

They are characterized by a top aiguille acuteness (or added correctly, irradiance) that usually leads to nonlinear interactions in assorted materials, including air. These processes are advised in the acreage of nonlinear optics.

In the specialized literature, "ultrashort" refers to the femtosecond (fs) to picosecond (ps) range, although such pulses no best authority the almanac for the beeline pulses artificially generated. Indeed, beating durations on the attosecond time calibration accept been reported.

The 1999 Nobel Prize in Chemistry was awarded to Ahmed H. Zewail for application ultrashort pulses to beam actinic reactions on the timescales they action on, aperture up the acreage of femtochemistry.

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