提出了一种基于微纳光纤环的多波长锁模光纤激光器, 该光纤激光器由“8”字形激光腔和微纳光纤环两个部分构成。光纤激光器锁模机制是基于非线性放大环形镜的等效可饱和吸收作用, 并在单向激光腔一侧加入微纳光纤环, 该环是由单模光纤火焰拉锥后扭曲制成的。由于不同波长的光在通过微纳光纤环扭曲区域时会产生相位差, 从而导致了多波长锁模现象。实验中, 通过增加抽运功率和调节偏振控制器获得双波长的锁模脉冲。该多波长锁模光纤激光器具有全光纤结构, 在光传感、光学测量、微波光子学、光信号处理、太赫兹波产生和波分复用光传输系统等领域都有着非常重要的应用。

The multiwavelength mode-locked fiber laser with a micro-fiber loop is proposed. The fiber laser is composed of two parts, the 8-shaped laser cavity and the micro-fiber loop. The mode-locked mechanism is based on the equivalent saturable absorption effect of nonlinear amplifying loop mirror. The micro-fiber loop fabricated through twisting the taped fiber is incorporated on the side of the unidirectional laser cavity, which results in a phase difference when the light with different wavelengths pass through the micro-fiber loop. Thus, the multi-wavelength mode-locked can be realized. In the experiment, the dual-wavelength mode-locked pulses are obtained by increasing the pump power and adjusting the polarization controller. The multi wavelength mode-locked fiber laser with all-fiber configuration has potential applications in optical sensing, optical measurement, microwave photonics, optical signal processing, terahertz generation and wavelength division multiplexing optical transmission system.