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Efficient generation of third harmonics in Yb-doped femtosecond fiber laser via spatial and temporal walk-off compensation [Early Posting]

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摘要

On the basis of a home-made femtosecond Yb-doped fiber laser, we designed a compact and efficient third harmonic generation scheme by a simple compensation plate of β-BaB2O4 (BBO) crystal. The compensation plate is optimized through its thickness and cutting angle to reverse both spatial and temporal walk-off. By optimizing the parameters of the compensation plate and incident light intensity, a maximum output of 2.23 W with a repetition rate of 1 MHz at 345 nm is obtained, which implies a conversion efficiency of 23% from infrared to ultraviolet (UV).

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作者单位:

    Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Science and Technology of Ministry of Education, School of Precision Instruments and Opto-electronics Engineering
    Tianjin University
    天津大学精密仪器与光电子工程学院超快激光研究室

引用该论文

Zhang Meng,Chu Yuxi,Zhao Jun,Yan Dongyu,Li Yongzhi,Bi Genyu,Liu Bowen,Hu Minglie. Efficient generation of third harmonics in Yb-doped femtosecond fiber laser via spatial and temporal walk-off compensation[J].Chinese Optics Letters,2021,19(3):03.