Abstract
We report the fabrication of tellurite composite microstructured optical fibers (CMOFs) which consist of a TeO2–Li2O–WO3–MoO3–Nb2O5 (TLWMN) tellurite glass core and TeO2–ZnO–Na2O–La2O3 (TZNL) tellurite glass cladding. Flattened chromatic dispersion and tunable zero dispersion wavelength (ZDW) were realized in the small core diameter (∼1.5 µm) fiber with six surrounding air holes. The optical loss was measured to be about 4.0 dB/m in the spectral range of 1510–1640 nm. Supercontinuum (SC) generation was demonstrated by a femtosecond laser pumping at 1.55 µm. The threshold pump power for this novel tellurite CMOF was the lowest among tellurite microstructured optical fibers (MOFs).