Compression of amplified chirped optical pulses

Strickland, D.; Mourou, G.

doi:10.1016/0030-4018(85)90151-8

Cited by 1,017 publications

(567 citation statements)

References 4 publications

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“…by dispersion, when propagating through material. In the Chirped Pulse Amplification (CPA) [18] scheme a linear chirp is generated by different propagation distances of the spectral components. The stretched pulse is amplified without the risk of damaging the optical components (especially the amplifier crystals).…”

Section: Mathematical Descriptionmentioning

confidence: 99%

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Investigations of Field Dynamics in Laser Plasmas with Proton Imaging

Sokollik

2011

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Section: Mathematical Descriptionmentioning

confidence: 99%

“…The spectral bandwidth (∼ 5 nm) of the amplified pulses allows temporal pulse durations between 1-2 ps [86,87]. The laser system uses the CPA-technique [18] to amplify the laser pulses up to 10 J. The amplification takes place in a chain of amplifiers with growing diameter, pumped by flash lamps.…”

Section: Nd:glass Laser Systemmentioning

confidence: 99%

Investigations of Field Dynamics in Laser Plasmas with Proton Imaging

Sokollik

2011

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“…However, direct amplification of these fs laser pulses is not possible, as the high temporal peak intensities involved would exceed the damage threshold of the amplifier gain medium. Therefore chirped pulse amplification (CPA) is employed, which was introduced by Strickland and Mourou [69]. Prior to amplification, the pulses from the oscillator pass through a 'stretcher', where a suitable setup of gratings introduces different optical pathlengths for the wavelengths in the oscillator spectrum.…”

Section: Generation Of Femtosecond Laser Pulsesmentioning

confidence: 99%

Adaptive Femtosecond Quantum Control

Brixner

Dietl

Krampert

et al. 2004

Springer Series in OPTICAL SCIENCES

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“…The development of the chirped pulse amplification (CPA) technique in the mid-1980s [16] has recently led to commercial availability of powerful and reliable femtosecond (10 -15 s) laser systems. They open new possibilities for high quality material machining.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond Laser Micromachining of Single-Crystal Superalloys

Feng

Picard

Liu

et al. 2004

Superalloys 2004 (Tenth International Symposium)

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Investigations on femtosecond laser micromachining of single crystal superalloys with and without plasma-sprayed thermal barrier coatings were conducted under laser fluences ranging from 0.1 J/cm 2 up to 160 J/cm 2 . Micromachining was carried out in air using a titanium:sapphire laser system ( = 780 nm) operating at a repetition rate of 1 kHz and delivering individual pulses of ~150 fs duration. The ablation threshold of the single crystal superalloy was determined as 203 ± 20 mJ/cm 2 . Laser-induced damage was examined by means of scanning electron microscopy and transmission electron microscopy. These studies indicate a complete absence of any melting, recast layers, heat-affected zones or microcracks in the vicinity of the machining area. The only form of damage observed in the single crystal superalloy machined near or above the ablation threshold was a laser-induced plastically deformed layer with a maximum extent of ~5 m. Machining through ceramic thermal barrier coatings on a superalloy produced no delamination along the superalloy/coating interfaces or cracks within the TBC or bond coat. The residual roughness of the machined surface was in the sub-micron range. The present study suggests that femtosecond laser micromachining is a very promising technique for production of finescale features in multi-layer material systems for aerospace and power generation components.

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Compression of amplified chirped optical pulses

Cited by 1,017 publications

References 4 publications

Investigations of Field Dynamics in Laser Plasmas with Proton Imaging

Investigations of Field Dynamics in Laser Plasmas with Proton Imaging

Adaptive Femtosecond Quantum Control

Femtosecond Laser Micromachining of Single-Crystal Superalloys

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