使用单脉冲频率分辨光学门控技术对高能量（80焦耳）短脉冲（600飞秒）激光进行脉冲形状测量。

Pulse shape measurements using single shot-frequency resolved optical gating for high energy (80 J) short pulse (600 fs) laser.

作者信息

Palaniyappan S, Shah R C, Johnson R, Shimada T, Gautier D C, Letzring S, Jung D, Hörlein R, Offermann D T, Fernández J C, Hegelich B M

机构信息

Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA.

出版信息

Rev Sci Instrum. 2010 Oct;81(10):10E103. doi: 10.1063/1.3464258.

DOI:10.1063/1.3464258

PMID:21033968

Abstract

Relevant to laser based electron/ion accelerations, a single shot second harmonic generation frequency resolved optical gating (FROG) system has been developed to characterize laser pulses (80 J, ∼600 fs) incident on and transmitted through nanofoil targets, employing relay imaging, spatial filter, and partially coated glass substrates to reduce spatial nonuniformity and B-integral. The device can be completely aligned without using a pulsed laser source. Variations of incident pulse shape were measured from durations of 613 fs (nearly symmetric shape) to 571 fs (asymmetric shape with pre- or postpulse). The FROG measurements are consistent with independent spectral and autocorrelation measurements.

摘要

与基于激光的电子/离子加速相关，已开发出一种单次谐波产生频率分辨光学门控（FROG）系统，用于表征入射到纳米箔靶并透过该靶的激光脉冲（80 J，约600 fs），该系统采用中继成像、空间滤波器和部分镀膜玻璃基板来减少空间不均匀性和B积分。该装置无需使用脉冲激光源即可完全对准。测量了入射脉冲形状的变化，其持续时间从613 fs（接近对称形状）到571 fs（具有预脉冲或后脉冲的不对称形状）。FROG测量结果与独立的光谱和自相关测量结果一致。