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.
References in periodicals archive ?
Strickland and Mourou's technique, called chirped pulse amplification (CPA), became standard for high intensity lasers.
Towrie et al., "The prospects for ultrashort durationand ultrahigh intensity using optical parameteric chirped pulse amplifications," Optics Communications, vol.
In all cases the results indicate that comparing an unchirped with a chirped pulse of the same energy, a lesser fraction of energy is available for soliton formation in the chirped case.
A configuration based on the concept of chirped pulse amplification is used for SNR enhancement in a [phi]-OTDR sensor as reported in [33].
Introduced in this work, is the second scenario that combines the chirped pulse microwave generation and optical beam steering.
An international group of contributors discuss optical parametric and chirped pulse amplification; ultrafast sources and amplifiers; high power fiber, short pulse, and short wavelength fiber lasers; fiber and nonlinear optics; UV and visible sources; ytterbium, neodymium, mid-infrared, and far-infrared lasers; infrared sources; growth, characterization, and spectroscopy; and advanced concepts and novel architectures.
Of this amount, $3 million is provided for continued development of the petawatt laser at the University of Texas at Austin; $1 million is provided for an optical parametric chirped pulse amplifier upgrade and associated operations of the short pulse laser at the University of Nevada, Reno; $1 million is provided to the University of Nevada, Reno to continue its collaboration with Sandia National Laboratories on highly diagnosed studies of exploding wire arrays and implosion dynamics; and $1 million is provided for research using the Z-Beamlet laser at Sandia National Laboratories under the Z-Petawatt Consortium...."
Mourou, then at the University of Rochester in New York and now director of Michigan's optical science center, led a team that, to generate high-power laser pulses, invented a technique called chirped pulse amplification.
The chirped pulse inherently requires more processing.
Arthur Ashkin, Donna Strickland and Gerard Mourou won the 2018 prize for two contributions to laser science, Ashkin for his work on optical tweezers, and Mourou and Strickland for the invention of chirped pulse amplification, a technique to amplify an ultrashort laser pulse up to petawatt levels.
This consideration explains why the positive chirped pulse emits the DW later, or the negative chirped pulse emits the DW earlier compare to the case of unchirped pulse.