中文摘要：

国产双包层光纤对泵浦光不能实现有效吸收，从而导致剩余泵光过多的现象，本文采用了双二色镜的腔结构，研究了国产D型内包层掺Yb^3＋双包层光纤激光器的输出特性，得到了无剩余泵光的激光脉冲输出，中心波长为1．076μm，平均功率为604nW．

英文摘要：

A linear cavity double-clad fiber laser basing on two-dichroic-mirror, which can reuse the residual pump light existing in the output laser effectively, is presented. The output characteristics of D-shape inner cladding Yb^3＋-doped double-clad fiber laser are experimentally studied. The laser wavelength is 1. 076μm, and the average power of the pulse output without pump light is 604 roW.