波长可调谐被动锁模光纤激光器

为在光纤激光器中获得特定中心波长的锁模激光,进行了采用非线性光纤环形镜锁模的掺Yb3+光纤激光器的波长可调谐实验研究。获得了自启动锁模、中心波长在1030nm~1081nm范围内连续调谐的锁模脉冲输出;在中心波长1053nm时,测得光谱带宽6nm、脉冲宽度234.375ps、输出功率2.05mW、重复频率3.842MHz。这种被动锁模光纤激光器的锁模过程可以完全自启动,几乎不受外界环境变化的影响,可以长时间稳定工作,不仅可以提供特定中心波长的锁模激光,而且有望成为其它科学研究工作的中心波长可调谐的宽带锁模光纤激光种子源。

Wavelength-tunable passively mode-locked fiber lasers

In order to achieve special center wavelength in mode-locked fiber lasers,the experimental study of wavelength-tunable Yb~(3 )doped fiber lasers using the nonlinear optical loop mirror(NOLM) for mode-locked operating is reported.The fiber laser is self-starting easily and the operating center wavelength can be tuned from 1030nm to 1081nm.The fiber laser can generate 2.05mW average power of 234.375ps pulse duration at a repetition rate of 3.842MHz when the operating center wavelength is 1053nm and spectrum width is about 6nm.The self-starting of the mode-locked fiber laser can be achieved easily,and the mode-locked operation can be hardly influenced by the environment disturbance in days.It can produce the special center wavelength,and is to be applied in science and engineering as a center wavelength-tunable mode-locked fiber laser.