Confinement loss (CL), including cladding material losses, is comprehensively evaluated for TE, TM, and hybrid modes of hollow-core Bragg fibers. We show that the combined fiber loss tends to approach a loss depending only on CL for a small number N of cladding pairs, while it approaches a material loss limit value for large N. Transition point is defined by a crossing point of the asymptotes of and . and are investigated as a function of cladding material losses, cladding index contrast, and core radius , mainly under the quarter-wave stack condition. decreases in inverse proportion to the third and first powers of for TE and the other three modes for sufficiently large . An increase in more effectively reduces than an increase in the cladding index contrast. For , 5.0, and in the mode transmission, we attain fiber losses less than about , , and times cladding material losses, respectively.
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