The tellurite High-Index-Core（HIC）Bragg fibers have been regarded as a new type of photonic crystal fiber

which confine the modes in the core through total reflection and Photonic Bandgap（PBG）.The transmission characteristics of HIC Bragg fiber have been analyzed using the transfer matrix and Bloch theory methods.We design the HIC Bragg fiber with flat chromatic dispersion and low loss of 0.775 dB/m on the 1 064 nm.It is numerically shown that flat chromatic dispersion of HIC Bragg fiber can be generated at the conditions of the filling ratio of d/Λ =0.15

the core radius of R =5μm

refractive-index contrast ofΔn =0.02

the radial multilayer period ofΛ =1.2μm and the cladding layers of N =6.The zero dispersion point is also located at 1 064 nm.