Abstract
The waveguide dispersion profiles of (ZrF4–BaF2– LaF3 – AlF3 – NaF) (ZBLAN) microfiber in the mid-infrared (mid-IR) regime have been investigated numerically. The results show that ZBLAN microfiber has large normal dispersion for wavelength ranging from 2 to 5 $\mu \text{m}$ by tailoring the fiber geometry. Moreover, the Tm-doped mode-locked fiber laser has been modeled with the ZBLAN microfiber as the dispersion compensator, and the ultrafast pulse around 2 $\mu \text{m}$ can be generated. The results confirmed the availability of the dispersion compensator for mid-IR ultrafast photonics.
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