Zhang Lei, Cui Shuzhen, Liu Chi, Zhou Jun, Feng Yan
Shanghai Key Laboratory of Solid State Laser and Application, and Shanghai Institute of Optics and fine Mechanics, Chinese Academy of Sciences, Qinghe Road 390, Jiading, Shanghai 201800, China.
Opt Express. 2013 Mar 11;21(5):5456-62. doi: 10.1364/OE.21.005456.
A 170 W all-fiber linearly-polarized single-frequency sing-mode ytterbium amplifier at 1064 nm with an optical efficiency of 80% is demonstrated. 3.9 m long ytterbium-doped polarization maintaining fiber with a core diameter of 10 μm is used as the gain fiber, which guarantees a diffraction-limited output with a measured M(2) of 1.02. To suppress the stimulated Brillouin scattering, longitudinally varied strains are applied on the gain fiber according to the signal power evolution and the temperature distribution. 7 times increase of the stimulated Brillouin scattering threshold is achieved.
展示了一个170瓦、全光纤、线性偏振、单频单模、波长为1064纳米、光效率为80%的镱放大器。使用了一根长度为3.9米、芯径为10微米的掺镱保偏光纤作为增益光纤，其保证了衍射极限输出，测得的M²为1.02。为了抑制受激布里渊散射，根据信号功率变化和温度分布对增益光纤施加纵向变化的应变。实现了受激布里渊散射阈值提高7倍。
