基于弯曲双折射Lyot滤波器的全光纤双波长锁模laser
All-fiber dual-wavelength mode-locked laser using a bend-induced-birefringence Lyot-filter as gain-tilt equalizer
摘要：
多波长光纤激光器由于其高效率和鲁棒性，在波分复用通信、太赫兹波产生和光学传感等领域有着广泛的应用前景。Lyot滤波器是一种很有潜力的多波长产生器件。然而，由于Lyot滤波器中保偏光纤的高双折射，使得普通Lyot滤波器很难实现宽带双波长或多波长锁模光纤激光器。本文首次提出了利用单模光纤弯曲产生的低双折射形成Lyot滤波器的想法，用于双波长锁模光纤激光器的产生。双波长锁模激光器的输出中心在1532和1556 nm，简化了双波长锁模激光器的结构。
英文摘要：
Multi-wavelength fiber lasers have emerged as a promising light source for the application in wavelength division multiplexing communication, terahertz wave generation and optical sensing due to high efficiency and robustness. Lyot-filter emerges as a potential device for multi-wavelength generation application. However, because of the high birefringence of polarization maintaining fiber in Lyot-filter, it is difficult to generate broadband dual-wavelength or multi-wavelength mode-locked fiber laser by using common Lyot-filter. In this paper, for the first time, we propose an idea of using the low birefringence induced by bending the single-mode fiber to form a Lyot-filter for dual-wavelength mode-locked fiber laser generation. The dual-wavelength output centers at 1532 and 1556 nm and it may simplify the set-up for dual-wavelength mode-locked laser.
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