Measurement of femtosecond laser focusing spot by optical imaging and pinhole method

Yuchi, 吴玉迟 Wu; Yingling, 何颖玲 He; Bin, 朱斌 Zhu; Tianshu, 温天舒 Wen; Kegong, 董克攻 Dong; Yi, 郭仪 Guo; Li, 孙立 Sun; Qing, 李庆 Li; Xiaodong, 王晓东 Wang; Yuqiu, 谷渝秋 Gu

doi:10.3788/hplpb20102212.2871

强激光与粒子束

2010

DOI: 10.3788/hplpb20102212.2871

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Measurement of femtosecond laser focusing spot by optical imaging and pinhole method

吴玉迟 Wu Yuchi¹,

何颖玲 He Yingling²,

朱斌 Zhu Bin³

et al.

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2012

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Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma

Wang¹,

Wang²,

Ma³

et al. 2012

J. Plasma Phys.

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For high-energy gain of electron acceleration by a laser wakefield, a stable or guiding propagation of an ultrashort, high-intensity laser pulse in a gas-target plasma is of fundamental importance. Preliminary experiments were carried out for the propagation of 30-fs, ∼100-TW laser pulses of intensities ∼10 19 W/cm 2 in plasma of densities ∼10 19 /cm 3 . Self-guiding length of nearly 1.4 mm was observed in a gas jet and 15 mm in a hydrogen-filled capillary. Fluid-dynamics simulations are used to characterize the two types of gas targets. Particle-in-cell simulations indicate that in the plasma, after the pulse's evolution of self-focusing and over-focusing, the high-intensity pulse could be stably guided with a beam radius close to the plasma wavelength. At lower plasma densities, a preformed plasma channel of a parabolic density profile matched to the laser spot size would be efficient for guiding the pulse.

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Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma

Wang¹,

Wang²,

Ma³

et al. 2012

J. Plasma Phys.

View full text Add to dashboard Cite

show abstract

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Measurement of femtosecond laser focusing spot by optical imaging and pinhole method

Cited by 1 publication

References 0 publications

Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma

Propagation of an ultrashort, high-intensity laser pulse in gas-target plasma

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