Abstract
A novel seven-core multicore tellurite fiber is proposed and fabricated in the paper. Each core with high index is made of $70{\rm TeO}_{2}-8{\rm Li}_{2}{\rm O}-19{\rm WO}_{3}-1{\rm MoO}_{3}-2{\rm Nb}_{2}{\rm O}_{5}$ (mol%) glass. The background with low index is made of $70{\rm TeO}_{2}-20{\rm ZnO}-5{\rm Na}_{2}{\rm O}-5{\rm La}_{2}{\rm O}_{3}$ (mol%) glass. Compared with the single-core tellurite fiber, this fiber has novel chromatic dispersion with two zero-dispersion wavelengths at 1.86 $\mu{\rm m}$ and 2.16 $\mu{\rm m}$ . The spatial interference fringes generated in the different cores of the fiber are obvious.
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