chirped pulse


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chirped pulse

A pulse in which the wavelength changes during the duration of the pulse. In a diode laser, chirp arises from direct modulation of the laser, because the refractive index changes with the electron density. The output of a laser may be chirped intentionally to create a high-powered, extremely short pulse. In this case, the initial pulse from an oscillator is stretched out using optics, amplified and then compressed back to its original duration.
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With chirped pulse amplification, saysMourou, "we can use a system that is 1,000 times smaller.
We foresee a paradigm shift in attosecond science with the new high repetition rate systems based on optical parametric chirped pulse amplification which are coming to age.
Specifically, collaborators on this project are working to design two high-average power ultrafast TiSa thin-disk laser systems, one amplifier system using chirped pulses to obtain high-energy pulses, and one high-power oscillator to achieve high repetition rates.