研究了一种基于非线性偏振旋转被动锁模没有进行色散管理的全正色散掺镱光纤激光器，在无外加滤波器的情况下实验产生了锁模耗散孤子脉冲。耗散孤子的形成是激光器中正光纤色散、非线性效应、腔传输、增益饱和和滤波效应综合作用的结果。实验产生的锁模耗散孤子脉冲能量达1.1 nJ。此外，对激光器的数值模拟结果与实验结果相一致，证实了全正色掺镱光纤激光器在无外加滤波器的情况下也可以产生稳定锁模耗散孤子脉冲。

The generation of mode-locked dissipative soliton pulse from an all-fiber ytterbium-dope laser based on nonlinear polarization rotation without dispersion compensation and additional filter has been demonstrated experimentally and numerically. The formation of the dissipative soliton pulse is a self-consistent result of various effects in the laser including positive fiber dispersion, nonlinearity, cavity transmission, gain saturation, and filtering over one cavity round trip. Stable mode-locked pulses with pulse energy of 1.1 nJ have been achieved. The operation of the dissipative soliton lasers is numerically simulated, which agrees with the experimental results.