Random pinhole attenuator for high-power laser beams  

作　　者：Seong Cheol Park Hyeok Yun Jin Woo Yoon Seong Ku Lee Jae Hee Sung Il Woo Choi Chang Hee Nam Kyung Taec Kim 

机构地区：[1]Department of Physics and Photon Science,Gwangju Institute of Science and Technology,Gwangju,Republic of Korea [2]Center for Relativistic Laser Science,Institute for Basic Science,Gwangju,Republic of Korea [3]Advanced Photonics Research Institute,Gwangju Institute of Science and Technology,Gwangju,Republic of Korea

出　　处：《High Power Laser Science and Engineering》2024年第3期116-121,共6页高功率激光科学与工程（英文版）

基　　金：supported by an Institute for Basic Science grant(IBS-R012-D1);a National Research Foundation of Korea(NRF)grant funded by the Korea government(MIST)(No.2022R1A2C3006025 and No.RS-2023-00218180)。

摘　　要：The intensity attenuation of a high-power laser is a frequent task in the measurements of optical science.Laser intensity can be attenuated by inserting an optical element,such as a partial reflector,polarizer or absorption filter.These devices are,however,not always easily applicable,especially in the case of ultra-high-power lasers,because they can alter the characteristics of a laser beam or become easily damaged.In this study,we demonstrated that the intensity of a laser beam could be effectively attenuated using a random pinhole attenuator(RPA),a device with randomly distributed pinholes,without changing the beam properties.With this device,a multi-PW laser beam was successfully attenuated and the focused beam profile was measured without any alterations of its characteristics.In addition,it was confirmed that the temporal profile of a laser pulse,including the spectral phase,was preserved.Consequently,the RPA possesses significant potential for a wide range of applications.

关 键 词：high-power laser intensity attenuation laser diagnostics 

分 类 号：TN24[电子电信—物理电子学]