We have experimentally demonstrated the flat supercontinuum (SC) generation using a 10-m-long ZrF₄-BaF₂-LaF₃-AlF₃-NaF (ZBLAN) fluoride fiber pumped by an erbium-doped mode-locked fiber laser incorporating carbon-nanotube-based saturable absorbers. In order to improve the spectral flatness of SC, the standardized single-mode fiber with different lengths is connected to the output of the mode-locked fiber laser before the pulse amplification. The generated SC with ZBLAN fiber exhibits the best spectral flatness with fluctuation less than 1.29dB over the wavelength of 1571.8nm–1803.1nm, showing potential applications in optical sensing.

中文翻译：

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掺Er锁模光纤激光器在ZBLAN光纤中产生光谱平坦的超连续谱

我们已经通过实验证明了平坦的超连续谱（SC）的产生，使用的是掺by碳的锁模光纤激光器泵浦的10m长ZrF ₄ -BaF ₂ -LaF ₃ -AlF ₃ -NaF（ZBLAN）氟化物光纤。基于纳米管的可饱和吸收剂。为了提高SC的光谱平坦度，在脉冲放大之前，将具有不同长度的标准化单模光纤连接到锁模光纤激光器的输出。用ZBLAN光纤产生的SC表现出最佳的光谱平坦度，在1571.8nm–1803.1nm的波长范围内波动小于1.29dB，显示了在光学传感中的潜在应用。