Generation of multi-watt sub-50 fs pulses in Mamyshev oscillators:influence of the central wavelength in the grating filter  

作　　者：Feihong Qiao Jinbo Wang Xinhe Dou Xiang Li Bole Song Zhiguo Lv 

机构地区：[1]School of Physical Science and Technology,Inner Mongolia University,Hohhot,China

出　　处：《High Power Laser Science and Engineering》2024年第6期130-137,共8页高功率激光科学与工程(英文版)

基　　金：supported by the National Natural Science Foundation of China (NSFC) (No.12164030);Young Science and Technology Talents of Inner Mongolia (No.NJYT22101);Central Government Guides Local Science and Technology Development Fund (No.2023ZY0005)

摘　　要：Mamyshev oscillators (MOs) exhibit the potential for generating high average power and ultrashort pulses. Herein,we construct an MO using flexible double-cladding ytterbium-fiber with a fusion-spliced-combiner pumped scheme.Consistent with the most reported research results, the offset filter separation significantly affects the pulse characteristics(spectrum, pulse duration, etc.). Notably, in comparison with red-shifting, blue-shifting the peak spectral emission of the grating filter relative to a constant central wavelength of the bandpass filter substantially enhances the laser output characteristics. This phenomenon, which has not been previously reported, results in an average power up to 2.23 W and a pulse duration as short as 49 fs. To our knowledge, this is the highest average power achieved in sub-50 fs pulse duration in the nonlinear polarization rotation-assisted mode-locked MO laser architecture. The presented technique offers unique scientific proof for developing ultrafast laser sources with higher average power and shorter pulse duration.

关 键 词：BLUE-SHIFT high average power ultrashort pulses 

分 类 号：TN248[电子电信—物理电子学] TN713TN752