Femtosecond mid-IR optical vortex laser based on optical parametric chirped pulse amplification  

作　　者：JUNYU QIAN YUJIE PENG YANYAN LI PENGFEI WANG BEIJIE SHAO ZHE LIU YUXIN LENG RUXIN LI 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]CAS Center for Excellence in Ultra-intense Laser Science,Shanghai 201800,China

出　　处：《Photonics Research》2020年第3期421-425,共5页光子学研究（英文版）

基　　金：Strategic Priority Research Program of the Chinese Academy of Sciences(XDB1603);International ST Cooperation Program of China(2016YFE0119300);Program of Shanghai Academic/Technology Research Leader(18XD1404200);Shanghai Municipal Science and Technology Major Project(2017SHZDZX02);National Natural Science Foundation of China(11127901,61925507)。

摘　　要：A femtosecond mid-infrared optical vortex laser can be used for high harmonic generation to extend cutoff energy to the kilo-electron-volt range with orbital angular momentum,as well as other secondary radiations.For these,we demonstrate a high-energy femtosecond 4μm optical vortex laser based on optical parametric chirped pulse amplification(OPCPA)for the first time.The optical vortex seed is generated from a femtosecond 4μm laser by a silicon spiral phase plate with the topological charge l of 1 before the stretcher.Through using a two-stage collinear OPCPA amplifier,the chirped vortex pulse is amplified to 12.4 m J with 200 nm full width at half-maximum bandwidth.After compression,the vortex laser pulse with 9.53 m J,119 fs can be obtained.Furthermore,the vortex characteristics of the laser beam are investigated and evaluated.This demonstration can scale to generate a higher-peak-power vortex mid-IR laser and pave a new way for high field physics.

关 键 词：PULSE OPTICAL LASER 

分 类 号：TN248[电子电信—物理电子学]