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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。
A multi-wavelength mode-locked fiber laser based on a micro / nano-fiber ring is proposed. The fiber laser consists of two parts: a laser cavity with “8” shape and a micro-nano fiber loop. The mode-locking mechanism of fiber laser is based on the equivalent saturable absorption of a non-linear magnifying toroidal mirror. A micro-nano-fiber ring is added to one side of the unidirectional laser cavity. The ring is made by twisting the single-mode fiber cone. As different wavelengths of light in the micro-fiber ring through the distortion of the region will produce a phase difference, resulting in multi-wavelength mode-locking phenomenon. In the experiment, the dual-mode mode-locked pulse was obtained by increasing the pumping power and adjusting the polarization controller. The multi-wavelength mode-locked fiber laser has an all-fiber structure and has very important applications in the fields of optical sensing, optical measurement, microwave photonics, optical signal processing, terahertz wave generation and wavelength division multiplexing optical transmission systems.