High-power non-perturbative laser delivery diagnostics at the final focus of 100-TW-class laser pulses  

作　　者：Fumika Isono Jeroen van Tilborg Samuel K.Barber Joseph Natal Curtis Berger Hai-En Tsai Tobias Ostermayr Anthony Gonsalves Cameron Geddes Eric Esarey 

机构地区：[1]Lawrence Berkeley National Laboratory,Berkeley,CA,USA [2]University of California,Berkeley,CA,USA

出　　处：《High Power Laser Science and Engineering》2021年第2期174-183,共10页高功率激光科学与工程（英文版）

基　　金：the U.S.Department of Energy(DOE),Office of Science,the Office of Basic Energy Sciences,and the Office of High Energy Physics,under Contract No.DE-AC02-05CH11231;the Gordon and Betty Moore Foundation under Grant No.GBMF4898.

摘　　要：Controlling the delivery of multi-terawatt and petawatt laser pulses to final focus,both in position and angle,is critical to many laser applications such as optical guiding,laser–plasma acceleration,and laser-produced secondary radiation.We present an online,non-destructive laser diagnostic,capable of measuring the transverse position and pointing angle at focus.The diagnostic is based on a unique double-surface-coated wedged-mirror design for the final steering optic in the laser line,producing a witness beam highly correlated with the main beam.By propagating low-power kilohertz pulses to focus,we observed spectra of focus position and pointing angle fluctuations dominated by frequencies below 70 Hz.The setup was also used to characterize the excellent position and pointing angle correlation of the 1 Hz high-power laser pulses to this low-power kilohertz pulse train,opening a promising path to fast non-perturbative feedback concepts even on few-hertz-class high-power laser systems.

关 键 词：high-power lasers laser diagnostics laser stabilization 

分 类 号：TN24[电子电信—物理电子学]