Characterization and application of plasma mirror for ultra-intense femtosecond lasers

Xulei Ge; Yuan Fang; Su Yang; Wenqing Wei; Feng Liu; Peng Yuan; Jingui Ma; Li Zhao; Xiaohui Yuan; Jie Zhang

doi:doi:10.3788/COL201816.013201

Chinese Optics Letters, 2018, 16 (1): 013201, Published Online: Jul. 17, 2018

Characterization and application of plasma mirror for ultra-intense femtosecond lasers Download： 899次

Xulei Ge ^1,2,3Yuan Fang ^2,3Su Yang ^2,3Wenqing Wei ^2,3Feng Liu ^2,3,*Peng Yuan ^2,3Jingui Ma ^2,3Li Zhao ¹Xiaohui Yuan ^2,3,**Jie Zhang ^2,3

Author Affiliations

¹ State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China

² Key Laboratory for Laser Plasmas (MoE) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China

³ Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China

Figures & Tables

Fig. 1. Schematic of the experimental setup. Ag1–Ag4 are silver mirrors, W1–W4 for wedged fused silica.

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Fig. 2. (Color online) (a) Nanosecond laser contrasts before and after using the PM. The peak at −30 ns is the attenuated main beam from one branch. Another branch of the delayed and focused beam displays that the initial laser pulse has two ultrashort prepulses (in the black curve) at −21 ns and −10 ns. The intensity of prepulses is reduced below the noise when using the PM (in the red curve). (b) Picosecond laser contrasts. Two orders of magnitude improvement is measured for 10 ps prior to the main peak.

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Fig. 3. (Color online) Normalized far-field distribution and lineouts of the reflected pulse, (a) from the Ag-coated surface at low laser energy, avoiding the PM breakdown, (b)–(d) for incoming laser intensities of Ipm=9.5×1014, 2.3×1015, and 2.6×1016 W/cm2, respectively. (e) The percentage of encircled energy over the whole beam with respect to the focal spot radius. (f) The integrated reflectivity and Strehl ratio as a function of laser intensity on PM. The error bars are due to shot-to-shot fluctuation and the dashed line represents the Strehl ratio in the case of (a).

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Fig. 4. (Color online) Proton acceleration results from testing the performances of the PM setup. (a) The proton beam spatial-intensity distribution for LC and (b) for HC. (c) The dependence of the maximum proton energies on target thicknesses for aluminium foils in LC (black squares) and carbon foils in HC (red circles) at Ipm=2.3×1015 W/cm2. (d) Maximum proton energy with respect to the laser intensity on the PM surface. The error bars are all due to shot-to-shot fluctuation.

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Xulei Ge, Yuan Fang, Su Yang, Wenqing Wei, Feng Liu, Peng Yuan, Jingui Ma, Li Zhao, Xiaohui Yuan, Jie Zhang. Characterization and application of plasma mirror for ultra-intense femtosecond lasers[J]. Chinese Optics Letters, 2018, 16(1): 013201.

Characterization and application of plasma mirror for ultra-intense femtosecond lasers Download： 899次

Fig. 1. Schematic of the experimental setup. Ag1–Ag4 are silver mirrors, W1–W4 for wedged fused silica.

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Characterization and application of plasma mirror for ultra-intense femtosecond lasers Download： 899次

Fig. 1. Schematic of the experimental setup. Ag1–Ag4 are silver mirrors, W1–W4 for wedged fused silica.

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