AdValue Photonics Inc., 4585 South Palo Verde Road, Suite 405, Tucson, Arizona 85714, USA.
Opt Lett. 2009 Dec 1;34(23):3616-8. doi: 10.1364/OL.34.003616.
We report self-starting passively mode-locked fiber lasers with a saturable absorber mirror using a piece of 30-cm-long newly developed highly thulium (Tm)-doped silicate glass fibers. The mode-locked pulses operate at 1980 nm with duration of 1.5 ps and energy of 0.76 nJ. This newly developed Tm-doped silicate fiber exhibits a slope efficiency of 68.3%, an amplified spontaneous emission spectrum bandwidth (FWHM) of 92 nm, and a gain per unit length of greater than 2 dB/cm. To the best of our knowledge, it is the first demonstration of mode-locked 2 mum fiber laser using shorter than 1-m-long active fiber, which paves the way for the demonstration of mode-locked fiber laser at 2 mum with gigahertz fundamental repetition rate.
我们报告了一种使用一段 30 厘米长的新型高掺铥（Tm）硅酸盐玻璃光纤的自启动被动锁模光纤激光器，采用可饱和吸收镜。锁模脉冲在 1980nm 处工作，持续时间为 1.5ps，能量为 0.76nJ。这种新开发的 Tm 掺杂硅酸盐光纤表现出 68.3%的斜率效率、92nm 的放大自发发射光谱带宽（FWHM）和大于 2dB/cm 的单位长度增益。据我们所知，这是首次使用短于 1 米的有源光纤演示 2μm 锁模光纤激光器，为演示千兆赫兹基本重复率的 2μm 锁模光纤激光器铺平了道路。
