High signal-to-noise ratio, single-frequency 2 μm Brillouin fiber laser.

@article{Luo2014HighSR,
  title={High signal-to-noise ratio, single-frequency 2 $\mu$m Brillouin fiber laser.},
  author={Yongfeng Luo and Yulong Tang and Jianlong Yang and Yao Wang and Shiwei Wang and Kunyu Tao and Li Zhan and Jian-qiu Xu},
  journal={Optics letters},
  year={2014},
  volume={39 9},
  pages={
          2626-8
        }
}
A high optical signal-to-noise ratio (OSNR) single-frequency 2 μm Brillouin fiber laser (BFL) with watt-level output and high transfer efficiency is demonstrated for the first time to the best of our knowledge. The Brillouin pump is constructed with a two-stage thulium-doped fiber amplifier (TDFA) seeded by a 2 μm laser diode, providing 4.02 W average power with 1 MHz linewidth. Using an optimized length of 14 m for the Brillouin ring cavity, the BFL works stably in single-mode region with 8… 
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