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Demonstration of anti-Stokes cooling in Yb-doped ZBLAN fibers at atmospheric pressure

机译:在大气压下掺杂ZBLAN纤维中抗风型冷却的抗风扬声器

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For the first time, to the best of our knowledge, optical cooling is demonstrated in a fiber at atmospheric pressure. Using a specialized slow-light fiber Bragg grating temperature sensor, -5.2 mK and -0.65 K were measured in a single-mode (1% YbF3) and multimode (3% YbF3) ZBLAN fiber with respective cooling efficiencies of 2.2% and 0.90%. Fitting a recently reported quantitative model of optical cooling in fibers to the measured temperature change dependence on the pump power per unit length validates the model and allows us to infer the fibers' absorptive loss and quenching lifetime, key parameters that are scarce in literature. These values are necessary for accurate cooling predictions and will aid in the development of fibers for application in optical coolers and radiation-balanced lasers. (C) 2019 Optical Society of America
机译:尽管我们所知,首次在大气压下在纤维中证明光学冷却。 使用专门的慢光纤布拉格光栅温度传感器,在单模(1%YBF3)和多模(3%YBF3)Zblan纤维中测量-5.2mk和-0.65 k,其相应的冷却效率为2.2%和0.90% 。 拟合最近报道的纤维中的光学冷却定量模型,以测量的温度变化对泵功率的依赖性每单位长度验证模型,并允许我们推断纤维的吸收损失和淬火寿命,文学中稀缺的关键参数。 这些值对于精确的冷却预测是必要的,并有助于在光学冷却器和辐射平衡激光器中应用纤维的开发。 (c)2019年光学学会

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