Generation of 12th order harmonic mode-locking in a Nd-doped single-mode all-fiber laser operating at 0.9μm  

作　　者：张斌 李平 刘兆军 李明 刘靖 赵浩旭 胡琼宇 陈晓寒 Bin Zhang;Ping Li;Zhaojun Liu;Ming Li;Jing Liu;Haoxu Zhao;Qiongyu Hu;Xiaohan Chen(Center for Optics Research and Engineering,Key Laboratory of Laser&Infrared System,Ministry of Education,Shandong University,Qingdao 266237,China;School of Information Science and Engineering,Shandong Provincial Key Laboratory of Laser Technology and Application,Shandong University,Qingdao 266237,China)

机构地区：[1]Center for Optics Research and Engineering,Key Laboratory of Laser&Infrared System,Ministry of Education,Shandong University,Qingdao 266237,China [2]School of Information Science and Engineering,Shandong Provincial Key Laboratory of Laser Technology and Application,Shandong University,Qingdao 266237,China

出　　处：《Chinese Optics Letters》2023年第1期97-103,共7页中国光学快报（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province(Nos.ZR2019MF047,ZR2020MF126,and ZR2019MF043).

摘　　要：Based on the Nd-doped single-mode fiber as the gain medium,an all-fiber 12th harmonic mode-locked(HML)laser operating at the 0.9μm waveband was obtained for the first time,to the best of our knowledge.A mandrel with a diameter of 10 mm was employed to introduce bending losses to suppress mode competition at 1.06μm,which resulted in a suppression ratio of up to 54 dB.The 1st–12th order HML pulses with the tunable repetition rate of 494.62 kHz–5.94 MHz were obtained in the mode-locked laser with a center wavelength of∼904 nm.In addition,the laser has an extremely low threshold pump power of 88 mW.To the best of our knowledge,this is the first time that an HML pulse has been achieved in a 0.9μm Nd-doped single-mode all-fiber mode-locked laser with the advantages of low cost,simple structure,and compactness,which could be an ideal light source for two-photon microscopy.

关 键 词：Nd-doped fiber laser harmonic mode-locking bending loss nonlinear polarization rotation low repetition rate 

分 类 号：TN248[电子电信—物理电子学]