Pr³⁺-doped fluorotellurite glass fibers (PDFTFs) were fabricated by using a rod-in-tube method. By using a 976/1400 nm dual-wavelength upconversion pump technique, an intense emission at 605 nm was obtained from a 6 cm long PDFTF, which was attributed to the transition ¹D₂ → ³H₄ of Pr³⁺ ions. With an increase in power of the 1400 nm laser from ∼34 to ∼136 mW, the spectral bandwidth of the 605 nm emission decreased and the intensity of the 605 nm emission increased monotonically, indicating the generation of 605 nm amplified spontaneous emission (ASE). To the best of our knowledge, this is the first report of 605 nm ASE in PDFTFs. Our results showed that PDFTFs had the potential for constructing red fiber lasers and amplifiers.

中文翻译：

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Pr3+ 掺杂氟碲酸盐玻璃纤维在 605 nm 处强发射

采用管棒法制备了Pr ³⁺掺杂氟碲酸盐玻璃纤维（PDFTF）。通过使用976/1400 nm双波长上转换泵浦技术，从6 cm长的PDFTF获得了605 nm的强发射，这归因于Pr ^3+离子的1 D ₂ → ³ H ₄跃迁。随着1400 nm激光功率从~34 mW增加到~136 mW，605 nm发射的光谱带宽减小，605 nm发射的强度单调增加，表明产生了605 nm放大自发发射（ASE） 。据我们所知，这是 PDFTF 中 605 nm ASE 的第一份报告。我们的结果表明 PDFTF 具有构建红色光纤激光器和放大器的潜力。