Intense Two-Octave Ultraviolet-Visible-Infrared Supercontinuum Laser via High-Efficiency One-Octave Second-Harmonic Generation  

作　　者：Mingzhou Li Lihong Hong Zhi-Yuan Li 

机构地区：[1]School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510641,China

出　　处：《Research》2022年第4期179-187,共9页研究（英文）

基　　金：The authors are grateful for the financial support from the National Natural Science Foundation of China(11974119);Science and Technology Project of Guangdong(2020B010190001);Guangdong Innovative and Entrepreneurial Research Team Program(2016ZT06C594);National Key R&D Program of China(2018YFA 0306200).

摘　　要：Intense ultrabroadband laser source of high pulse energy has attracted more and more attention in physics,chemistry,biology,material science,and other disciplines.We report design and realization of a chirped periodically poled lithium niobate nonlinear crystal that supports ultrabroadband second-harmonic generation covering 350-850 nm by implementing simultaneously up to 12 orders of quasiphase matching against ultrabroadband pump laser covering 700-1700 nm with an average high conversion efficiency of about 25.8%.We obtain a flat supercontinuum spectrum with a 10 dB bandwidth covering more than one octave(about 375-1200 nm)and 20 dB bandwidth covering more than two octaves(about 350-1500 nm)in the ultraviolet-visible-infrared regime and having intense energy as 0.17 mJ per pulse through synergic action of second-order and third-order nonlinearity under pump of 0.48 mJ per pulse Ti:sapphire femtosecond laser.This scheme would provide a promising method for the construction of supercontinuum laser source with extremely broad bandwidth,large pulse energy,and high peak power for a variety of basic science and high technology applications.

关 键 词：PUMP EFFICIENCY INFRARED 

分 类 号：TN248[电子电信—物理电子学]