Three-dimensional schematic and cross-sectional view of a holmium-doped ZBLAN photonic crystal fiber, illustrating the microstructured air-hole cladding, air-hole diameter (dₐ), and pitch (Λ). The ...
Ultrashort mid-infrared (mid-IR) laser pulses are essential for applications such as molecular spectroscopy, nonlinear microscopy, and biomedical imaging, but their generation often relies on complex ...