Chernykh D S, Krylov A A, Levchenko A E, Grebenyukov V V, Arutunyan N R, Pozharov A S, Obraztsova E D, Dianov E M
Appl Opt. 2014 Oct 10;53(29):6654-62. doi: 10.1364/AO.53.006654.
A soliton-type erbium-doped all-fiber ring laser hybrid mode-locked with a co-action of arc-discharge single-walled carbon nanotubes (SWCNTs) and nonlinear polarization evolution (NPE) is demonstrated. For the first time, to the best of our knowledge, boron nitride-doped SWCNTs were used as a saturable absorber for passive mode-locking initiation. Moreover, the NPE was introduced through the implementation of the short-segment polarizing fiber. Owing to the NPE action in the laser cavity, significant pulse length shortening as well as pulse stability improvement were observed as compared with a SWCNTs-only mode-locked laser. The shortest achieved pulse width of near transform-limited solitons was 222 fs at the output average power of 9.1 mW and 45.5 MHz repetition frequency, corresponding to the 0.17 nJ pulse energy.
展示了一种孤子型掺铒全光纤环形激光器，它通过电弧放电单壁碳纳米管（SWCNT）与非线性偏振演化（NPE）的共同作用实现混合锁模。据我们所知，首次将氮化硼掺杂的SWCNT用作被动锁模启动的可饱和吸收体。此外，通过采用短段偏振光纤引入了NPE。由于激光腔内的NPE作用，与仅采用SWCNT锁模的激光器相比，观察到脉冲长度显著缩短以及脉冲稳定性提高。在输出平均功率为9.1 mW、重复频率为45.5 MHz时，实现的近变换极限孤子的最短脉冲宽度为222 fs，对应脉冲能量为0.17 nJ。
