利用半导体可饱和吸收镜(SESAM)和光纤环形镜(FLM)分别作为腔镜，实现了线形腔结构的全光纤掺镱激光器。通过调节偏振控制器(PC)和抽运功率得到了调Q、调Q锁模、连续锁模、二次谐波、三次谐波、多波长等多种输出状态。其中连续锁模状态可实现开机自启动，脉冲宽度31 ps，单脉冲能量40 pJ，重复频率19.3 MHz，中心波长1030.8 nm，光谱带宽2.3 nm。多波长输出信号中心波长在1033 nm左右，波长间隔及波长数随抽运功率和PC状态发生变化。最大抽运功率(420 mW)时，可得到最小平均波长间隔约0.11 nm。实验中得到10 dB光谱范围内最大波长数为35，此时3 dB范围内对应的波长数为34。

Using a semiconductor saturable absorber mirror (SESAM) and a fiber loop mirror (FLM) as end mirror respectively, an all-fiber line-cavity Yb3+-doped laser is demonstrated. Q-switched pulse, Q-switched mode-locking, coherent mode-locking, harmonic pulses, and multiwavelength operation are obtained by adjusting the pump power and the polarization controller (PC). Mode-locking can be self-started and the width of mode-locking pulses is 31 ps. The pulse repetition rate is 19.3 MHz, corresponding to 40 pJ pulse energy. The spectral bandwidth of the mode-locked operation is 2.3 nm, at the center wavelength of 1030.8 nm. While multiwavelength operation centered at about 1033 nm is achieved, the wavelength space and the number of wavelength can be changed by adjusting the pump power and the PC. At the maximum pump power of 420 mW, the average wavelength space can be as small as about 0.11 nm. Up to 35 wavelengths within the spectral range of 10 dB are obtained, with 34 wavelengths in the 3 dB scale.