高功率2μm波长可调谐超短脉冲光纤激光器  

High-power wavelength-tunable ultrashort pulse fiber laser at 2μm

作　　者：宋伟华 彭志刚[1,2] 侯玉斌[1,2] 幺鹏 张奕 王璞[1,2] Song Weihua;Peng Zhigang;Hou Yubin;Yao Peng;Zhang Yi;Wang Pu(Institute of Laser Engineering,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Beijing Engineering Research Center of Laser Applied Technology,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材料与制造学部激光工程研究院,北京100124 [2]北京工业大学北京激光应用技术研究中心,北京100124

出　　处：《强激光与粒子束》2022年第3期5-12,共8页High Power Laser and Particle Beams

基　　金：国家自然科学基金重点项目(62035002)。

摘　　要：高功率2μm波长可调谐的超短脉冲激光具有峰值功率高、脉冲宽度窄、波长可调谐等优势,在医疗手术、大气通信、光电对抗等领域具有广泛的应用。利用高峰值功率的掺铒光纤放大器泵浦高非线性光纤,在全光纤化结构中获得了1895~2165 nm可调谐的拉曼孤子输出。采用啁啾脉冲放大技术对拉曼孤子的脉冲能量进行提升,放大后拉曼孤子的单脉冲能量为1.56μJ,平均功率达到50.6 W,脉冲宽度为83 ps。经过光栅对压缩后,脉冲宽度降低至1.23 ps,平均功率为22 W,峰值功率达到0.55 MW。放大后的脉冲仍具有波长调谐的能力,当输出功率为5 W和50.6 W时,脉冲的波长调谐范围分别为38 nm和8 nm。Two-μm ultrashort pulse laser with high power and tunable wavelength has been widely applied in medical surgery,atmospheric communication,photoelectric countermeasures and other fields,owning to the advantages of high peak power,narrow pulse width,tunable-wavelength,etc.We achieved a tunable Raman soliton output at 1895~2165 nm in an all-optical fiber thinning structure using a high nonlinear fiber pumped by an erbium-doped fiber amplifier with high peak power.The pulse energy of the Raman soliton was enhanced by the chirped pulse amplification technique.After amplification,a single pulse energy of 1.56μJ,an average power of 50.6 W and a pulse width of 83 ps were achieved.After grating pair compression,a pulse width of 1.23 ps,an average power of 22 W and a peak power of 0.55 MW could be realized.The amplified pulse still has the ability of wavelength tuning.The wavelength tuning ranges of the pulse are 38 nm at average power of 5 W and 8 nm at average power of 50.6 W,respectively.

关 键 词：拉曼孤子 波长可调谐 超短脉冲 高功率光纤激光器 全光纤化 

分 类 号：TN248[电子电信—物理电子学]