Gain-switched watt-level thulium-doped fiber laser and amplifier operating at 1.7μm  

作　　者：Yang Xiao Xusheng Xiao Lutao Liu Haitao Guo 

机构地区：[1]State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi’an,China [2]Center for Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing,China

出　　处：《High Power Laser Science and Engineering》2022年第6期49-59,共11页高功率激光科学与工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(62005312,62090065,and 61935006);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(2022409);the Key Research and Development Projects of Shaanxi Province(2022GY-423)。

摘　　要：A 1.7μm gain-switched thulium-doped all-fiber laser with a master oscillator power amplifier(MOPA)configuration,utilizing a bandpass fiber filter and a 1550 nm erbium/ytterbium-codoped fiber MOPA,is demonstrated.The influences of pump pulse parameters(repetition rate and pulse duration)and laser cavity structures(ring and linear)on the laser performances were experimentally investigated.To the best of our knowledge,the power quenching and drop were observed in the 1.7μm gain-switched thulium-doped fiber lasers for the first time,resulting from the mode-locked-resembling operation and nonlinear effects.Moreover,the fiber ring-cavity laser was more stable than the linear-cavity laser in the time domain and power.Finally,a laser with a maximum average power of 1.687 W,a slope efficiency of 19.7%,a single-pulse energy of 16.87μJ,a pulse width of 425 ns,a repetition rate of 100 kHz and a peak power of 39.69 W was obtained.

关 键 词：1.7μm GAIN-SWITCHING fiber laser power roll-off thulium doping 

分 类 号：TN248[电子电信—物理电子学] TN722