In this Letter, we demonstrate 22.7 W mid-infrared (MIR) supercontinuum (SC) generation in all-solid fluorotellurite fibers. All-solid fluorotellurite fibers based on ${{\rm TeO}_2} {\text -} {{\rm BaF}_2}{\text -}{{\rm Y}_2}{{\rm O}_3}$ and ${{\rm TeO}_2}$ modified fluoroaluminate glasses are fabricated by using a rod-in-tube method. By using a 0.6 m long fluorotellurite fiber with a core diameter of 11 µm as the nonlinear medium and a high-power 1.93–2.5 µm SC fiber laser as the pump source, we obtain 22.7 W SC generation from 0.93 to 3.95 µm in the fiber for a pump power of 39.7 W. The 10 dB bandwidth is about 1633 nm, and the corresponding spectral range is from 1890 to 3523 nm. The optical-to-optical conversion efficiency is about 57.2%. Our results show that all-solid fluorotellurite fibers are promising nonlinear media for constructing high-power MIR SC light sources.

中文翻译：

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氟碲石纤维中产生22.7 W中红外超连续谱

在这封信中，我们证明了全固态氟碲石纤维中产生了22.7 W的中红外（MIR）超连续谱（SC）。基于$ {{\ rm TeO} _2}的全固态氟碲石纤维{\ text-} {{\ rm BaF} _2} {\ text-} {{\ rm Y} _2} {{\ rm O} _3} $和$ {{\ rm TeO} _2} $改性的氟铝酸盐玻璃是通过使用管中棒法制造的。通过使用纤芯直径为11 µm的0.6 m长的氟碲石光纤作为非线性介质，并使用高功率1.93–2.5 µm SC光纤激光器作为泵浦光源，我们可以在0.93至3.95 µm的光纤中获得22.7 W SC的产生。泵浦功率为39.7W。10dB带宽约为1633 nm，相应的光谱范围为1890至3523 nm。光学转换效率约为57.2％。我们的结果表明，全固态氟碲石纤维是用于构建大功率MIR SC光源的有前途的非线性介质。