Experimental study on measuring pulse duration in the far field for high-energy petawatt lasers

Yu Jianwei; Ouyang Xiaoping; Zhou Li; Jiang Youen; Zhu Baoqiang; Zhu Jianqiang

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Experimental study on measuring pulse duration in the far field for high-energy petawatt lasers

机译：高能量PETAWATT激光器远场测量脉冲持续时间的试验研究

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We study the feasibility of measuring pulse duration in the far field in high-energy petawatt lasers using single-shot autocorrelation. This single-shot autocorrelation technique makes use of parametric upconversion in media with randomly oriented ferroelectric domains, which supports transverse second-harmonic generation with two counter-propagating fundamental beams. We show that this technique possesses a large time window, capable of measuring pulses with temporal duration ranging from a sub-picosecond to tens of picoseconds. We test the performance of this technique in the presence of multipulse structures, intensity modulations in the near field, and spatial-temporal coupling in fundamental beams. We also investigate the influence of beam pointing discrepancy on the measurement. Our study can serve as a preliminary experiment for robustly characterizing pulse duration in high-energy petawatt lasers. (c) 2018 Optical Society of America.

机译：我们研究了使用单次自相关的高能量PETAWATT激光器中远场测量脉冲持续时间的可行性。这种单次自相关技术利用随机取向铁电域的介质中的参数上转换，其支持具有两个反传播的基本梁的横向二次谐波产生。我们表明该技术具有大的时间窗口，能够测量具有时间持续时间的脉冲，从亚微微秒到数十剖反二十秒。我们在存在近场中的多漏层结构，强度调制的存在下测试该技术的性能，以及基本梁中的空间耦合。我们还研究了光束指向差异对测量的影响。我们的研究可以作为高能量PETAWATT激光器中脉搏持续时间的初步实验。（c）2018年光学学会。

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来源
《Applied optics》 |2018年第13期|共9页
作者
Yu Jianwei; Ouyang Xiaoping; Zhou Li; Jiang Youen; Zhu Baoqiang; Zhu Jianqiang;
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作者单位

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

Chinese Acad Sci Shanghai Inst Opt &

Fine Mech Joint Lab High Power Laser &

Phys Shanghai 201800 Peoples R China;

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Experimental study on measuring pulse duration in the far field for high-energy petawatt lasers

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