Highly efficient actively Q-switched Er3+-doped ZBLAN fiber laser operating around 2.8μm usind a La3Ga5SiO14 electro-optical modulator  

作　　者：Song Huang Shihao Tang Jiaqi Wang Yunfei Xiao Nixiang Li Shun Hu Yong Zhou Wei Zhang Xiaohui Ma Wentan Fang Xiaolin Chen Yi Luo Weiqing Gao 黄松;汤世豪;王佳琪;肖云飞;李倪翔;胡舜;周勇;张维;马晓辉;方文坛;陈小林;罗毅;高伟清(Department of Optical Engineering,School of Physics,Hefei University of Technology,Hefei 230009,China;Anhui Crystro Crystal Materials Co.,Ltd.,Hefei 230601,China)

机构地区：[1]Department of Optical Engineering,School of Physics,Hefei University of Technology,Hefei 230009,China [2]Anhui Crystro Crystal Materials Co.,Ltd.,Hefei 230601,China

出　　处：《Chinese Optics Letters》2024年第11期98-102,共5页中国光学快报(英文版)

基　　金：supported by the National Key R&D Program of China (No.2022YFB2903102);the National Natural Science Foundation of China (Nos.12204141,62105087,62105088;12304476);the Key R&D Program of Anhui Province(No.202104a07020010);the Natural Science Foundation of Anhui Province (No.2208085QF214);the Fundamental Research Funds for the Central Universities (Nos.JZ2024HGTB0235,JZ2024HGTB0212,and JZ2024HGTB0202)。

摘　　要：The mid-infrared (MIR) pulsed laser,operating at around 2.8μm,holds great significance due to its strong water absorption and the characteristic fingerprint spectra it provides for essential molecules.Nevertheless,the challenge of achieving stable MIR pulses persists,primarily due to the limited availability of reliable components operating in the MIR range.In this work,a La_(3)Ga_(5)SiO_(14)(LGS) crystal is used as the electro-optical modulator within the laser cavity constituted by an Er^(3+)-doped ZrF_(4)-BaF_(2)-LaF_(3)-AlF_(3)-NaF (ZBLAN) fiber,successfully generating Q-switched MIR lasing.This achievement is characterized by a low pump threshold,high slope efficiency,and adjustable repetition rate within the 2.8μm wavelength range.Stable pulses are attainable with long-term stability at a repetition rate of 18 kHz and a modest pump power of 0.6 W,and the maximum output power reaches 451 mW,featuring a pulse width of 64 ns at a pump power of 4.4 W,along with a slope efficiency of approximately 11.4%.It represents the highest efficiency in an electro-optical Q-switched laser operating around 2.8μm.Our research introduces an innovative active Q-switching approach to enhance the performance of MIR pulsed fiber lasers,thus advancing the development of MIR coherent sources and their associated applications.

关 键 词：mid-infrared range fiber laser Er3+-doped ZBLAN fiber actively Q-switched laser LagGassiO14 crystal. 

分 类 号：TN2[电子电信—物理电子学]