Performance of a monolithic Tm:YLF micro laser  

作　　者：姚宝权 李贺 白爽 崔铮 李晓磊 段小明 申英杰 戴通宇 

机构地区：[1]National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology

出　　处：《Chinese Optics Letters》2016年第6期51-54,共4页中国光学快报（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.61308009 and 61405047);the China Postdoctoral Science Foundation(No.2015M570290);the Fundamental Research Funds for the Central Universities Grant(No.HIT.NSRIF.2015042);the Science Fund for Outstanding Youths of Heilongjiang Province(No.JQ201310);the Heilongjiang Postdoctoral Science Foundation(No.LBH-Z14085)

摘　　要：We report a monolithic Tm：YLF micro laser in this Letter. In order to improve the relaxation oscillation of the laser, both ends of the crystal are coated, making the Tm：YLF crystal itself a resonant cavity. The micro laser is pumped by a 792 nm laser diode operated in the continuous wave（CW） mode. We obtain maximum output powers of 7.78 and 10.4 W at the total incident power of 43.6 W with focus lenses of 37.5 and 40 mm, respectively,corresponding to the slope efficiencies of 25.6% and 40.0% and the optical–optical conversion efficiencies of 17.8%and 23.8%. It is clear that the amplitude of the relaxation oscillation is smaller and the beam quality is better with the focus length of 37.5 mm; however, the laser with the focus length of 40 mm produces a higher output power and a more stable wavelength centering at 1878.44 nm.We report a monolithic Tm：YLF micro laser in this Letter. In order to improve the relaxation oscillation of the laser, both ends of the crystal are coated, making the Tm：YLF crystal itself a resonant cavity. The micro laser is pumped by a 792 nm laser diode operated in the continuous wave（CW） mode. We obtain maximum output powers of 7.78 and 10.4 W at the total incident power of 43.6 W with focus lenses of 37.5 and 40 mm, respectively,corresponding to the slope efficiencies of 25.6% and 40.0% and the optical–optical conversion efficiencies of 17.8%and 23.8%. It is clear that the amplitude of the relaxation oscillation is smaller and the beam quality is better with the focus length of 37.5 mm; however, the laser with the focus length of 40 mm produces a higher output power and a more stable wavelength centering at 1878.44 nm.

关 键 词：relaxation pumped resonant monolithic coated operated length itself oscillation excited 

分 类 号：TN248[电子电信—物理电子学]