【摘要】 报道了一种新型的、具有大模面积(LMA)的掺Yb3+ 双包层光子晶体光纤(PCF)激光器。光纤的长度约为5 m,光纤纤芯的直径为23μm,内包层的直径为420μm,数值孔径(对950 nm)为0.55。输出激光的中心波长为1 068.7 nm,激光最大输出功率为4.26 W。相对于入射的泵浦光,输出激光的转换效率为44.1%。实验结果表明,高功率激光输出存在着自脉动行为。更多还原

【Abstract】 A new kind large-mode-area double clad Yb³⁺-doped photonic crystal fiber laser was reported.A 13 W maximum output power multimode LD with 976 nm central wavelength was used as the pump source,long of 5 m large-mode-area double clad Yb^3+-doped photonic crystal fiber was used as gain medium and the F-P cavity was formed by a dichroic mirror and the output face of the fiber in the experiment.The photonic crystal fiber has a signal core with a diameter of 23 μm and a large inner cladding with a diameter of 420 μm.The numerical aperture of the inner cladding is about 0.55 at 950 nm.The central wavelength of the output spectrum is 1 068.7 nm,while the maximum output power of the fiber laser is 4.26 W.The conversion efficiency is 44.1% with respect to launched pump power.Self-pulsing behavior of the laser is observed.更多还原