Abstract In this work, a waveband tunable and switchable multi-line ring-cavity fiber laser is presented. Here, the losses of the cavity are controlled by means of a variable optical attenuator (VOA) and a thermal sensitive interferometric filter, which was formed by a stack of 3 layers at the tip of an optical fiber and a long thermal sensitive sleeve. Thus, the laser can emit single–, dual–, triple–, quadruple–, quintuple–and sextuple–wavelength emissions which can be switched by adjusting the VOA. Moreover, the laser waveband can be tuned by varying the temperature of the filter. Here, it is shown that with this setup a waveband tuning resolution of ∼ 1.37 nm ∘ C−1 within the range from 1527.52 to 1534.40 nm can be achieved.

中文翻译：

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基于热敏滤波器的可切换多波长可调波段光纤激光器

摘要 在这项工作中，提出了一种波段可调谐和可切换的多线环腔光纤激光器。在这里，腔体的损耗是通过可变光衰减器 (VOA) 和热敏干涉滤光片控制的，该滤光片由光纤尖端的 3 层堆叠和长热敏套管形成。因此，激光器可以发射单波长、双波长、三波长、四波长、五波长和六波长发射，这些发射可以通过调节 VOA 进行切换。此外，可以通过改变滤光片的温度来调谐激光波段。在这里，表明通过这种设置，可以在 1527.52 到 1534.40 nm 的范围内实现 ~ 1.37 nm ∘ C-1 的波段调谐分辨率。