摘要
We report on a quasi-three-level large-mode-area double-clad Yb-doped fiber laser that adopts a linear cavity consisting of a 0°fiber end and a cavity mirror.Two kinds of Yb−doped photonic crystal fiber(PCF)with different inner-clads(170µm and 200µm)and absorption coefficients(4.5 dB/m and 3 dB/m)are used as the gain media.By optimizing the structure and elements of the cavity,maximum output powers of 1.24 W and 1.1 W were yielded with optical conversion efficiencies of 7.8%and 6.8%when the fiber lengths were 25 cm and 40 cm with 170µm and 200µm inner-claddings,respectively.
作者
李平雪
张雪霞
刘志
池俊杰
LI Ping-Xue;ZHANG Xue-Xia;LIU Zhi;CHI Jun-Jie(Institute of Laser Engineering,Beijing University of Technology,Beijing 100124)
基金
by the Nova Program(2007B013).
