Multiphonon-assisted acousto-optical Q-switched laser at 1130 nm in Yb:YCOB crystal  

作　　者：Huichen Si Fei Liang Dazhi Lu Haohai Yu Huaijin Zhang Yicheng Wu 司会晨;梁飞;路大治;于浩海;张怀金;吴以成(State Key Laboratory of Crystal Materials and Institute of Crystal Materials,Shandong University,Jinan 250100,China)

机构地区：[1]State Key Laboratory of Crystal Materials and Institute of Crystal Materials,Shandong University,Jinan 250100,China

出　　处：《Chinese Optics Letters》2024年第10期70-74,共5页中国光学快报（英文版）

基　　金：the National Natural Science Foundation of China(Nos.52372010,92163207,and 52025021);the National Key Research and Development Program of China(Nos.2021YFA0717800 and 2021YFB3601504)。

摘　　要：In this Letter,we realized the phonon-assisted Q-switched laser operation in Yb:YCOB crystal.Differing from previous laser wavelengths below 1.1μm,we extended the wavelength to 1130 nm by amplifying multiphonon-assisted electronic transitions.At a repetition rate of 0.1 k Hz,the laser output power was 82 m W with a pulse width of 466.1 ns,corresponding to a high peak power of 1.76 k W and a single pulse energy of 0.82 m J,respectively.To the best of our knowledge,this represents the highest pulse energy among all Yb^(3+)-doped crystal lasers at the wavelength beyond 1.1μm.Such a large pulse energy could be explained by the laser rate-equation theory.These results indicated that the electron-phonon coupling effect not only extends the lasing wavelengths but also enables a fast temporal response to support nanosecond,picosecond,even femtosecond pulse laser operation.

关 键 词：Yb:YCOB crystal electron-phonon coupling acousto-optic Q-switch 

分 类 号：TN248.34[电子电信—物理电子学]