Intense Two-Octave Ultraviolet-Visible-Infrared Supercontinuum Laser via High-Efficiency One-Octave Second-Harmonic Generation
作者机构：School of Physics and OptoelectronicsSouth China University of TechnologyGuangzhou 510641China
出 版 物：《Research》 (研究（英文）)
年 卷 期：2022年第2022卷第4期
页 面：179-187页
核心收录：
学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 0702[理学-物理学]
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)
主 题：pump Efficiency Infrared
摘 要：Intense ultrabroadband laser source of high pulse energy has attracted more and more attention in physics,chemistry,biology,material science,and other *** 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 *** 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.
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