A Novel Seven-Core Multicore Tellurite Fiber

A novel seven-core multicore tellurite fiber is proposed and fabricated in the paper. Each core with high index is made of 70TeO
₂
-8Li
₂
O-19WO
₃
-1MoO
₃
-2Nb
₂
O
₅
(mol%) glass. The background with low index is made of 70TeO
₂
-20ZnO-5Na
₂
O-5La
₂
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 μm and 2.16 μm. The spatial interference fringes generated in the different cores of the fiber are obvious.