Wide wavelength selectable all-fiber thulium doped fiber laser between 1925 nm and 2200 nm

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Li, Jianfeng ; Sun, Zhongyuan ; Luo, Hongyu ; Yan, Zhijun ; Zhou, Kaiming ; Liu, Yong ; Zhang, Lin (2014)
  • Publisher: OPTICAL SOC AMER
  • Journal: OPTICS EXPRESS (issn: 1094-4087)
  • Related identifiers: doi: 10.1364/OE.22.005387
  • Subject:
    arxiv: Physics::Optics

We demonstrate an all-fiber Tm3+-doped silica fiber laser operating at a wide selectable wavelength range by using different fiber Bragg gratings (FBGs) as wavelength selection elements. With a specifically designed high reflective (HR) FBG and the fiber end as an output coupler, the lasing in the range from 1975 nm to 2150 nm with slope efficiency of >30% can be achieved. By employing a low reflective (LR) FBG as the output coupler, the obtainable wavelengths were extended to the range between 1925 nm and 2200 nm which is the reported longest wavelength from the Tm3+-doped silica fiber lasers. Furthermore, by employing a FBG array in the laser cavity and inducing bend loss between adjacent FBGs in the array, six switchable lasing wavelengths were achieved. © 2014 Optical Society of America.
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