We reported a multi-watt ~2.1 µ m laser output from a 30 cm long Ho 3+ -doped fluorotellurite microstructured fiber (FTMF) pumped by a homemade 1980 nm Tm 3+ -doped silica fiber laser. When the pump power was increased to 61.8 mW, lasing at 2067 nm was achieved from the Ho 3+ -doped FTMT, and an unsaturated maximum output power of ~8.08 W was obtained for a pump power of ~10.56 W. The corresponding slope efficiency was about 77.21%. During our experiments, no obvious damage was observed on the end face of the Ho 3+ -doped FTMF. Our results indicated that Ho 3+ -doped fluorotellurite fibers had the potential for constructing high power fiber lasers at 2.1 µ m.

中文翻译：

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8.08 W掺m的氟碲石光纤激光器，波长为2067 nm

我们报道了由自制的1980 nm Tm 3+掺杂的石英光纤激光器泵浦的30 cm长的Ho 3+掺杂的氟碲石微结构纤维（FTMF）产生的多瓦〜2.1 µm激光输出。当泵浦功率增加到61.8 mW时，从掺Ho 3+的FTMT中获得了2067 nm的激光发射，泵浦功率为〜10.56 W时，获得了不饱和的最大输出功率为〜8.08W。相应的斜率效率约为77.21％。在我们的实验过程中，在掺有Ho 3+的FTMF的端面上未观察到明显的损坏。我们的结果表明，掺Ho 3+的氟碲酸盐纤维具有构建2.1 µm高功率光纤激光器的潜力。