Dispersion-engineered step-index tellurite fibers for mid-infrared supercontinuum generation from 1.5 to 4.5 μm

We present the experimental development of dispersion-engineered tellurite fibers based on a simple step-index profile for mid-infrared supercontinuum generation. A supercontinuum spanning from 1.5 to 4.5 μm is obtained in a 12-cm-long fiber.