HOLEY FIBER AND METHOD FOR MANUFACTURING SAME

摘要

Provided is a holey fiber according to an embodiment of the present invention that includes a core portion; an inner-cladding portion positioned at an outer periphery of the core portion, the inner-cladding portion having a plurality of inner holes formed in a layered structure around the core portion; and an outer-cladding portion positioned at an outer periphery of the inner-cladding portion, the outer-cladding portion having a plurality of outer holes formed in a layered structure around the inner-cladding portion. Each of the inner holes is disposed to form a triangular lattice of which lattice constant ›1 is equal to or smaller than 3.0 µm and to form equal to or greater than two layers. Each of the outer holes is disposed to form a triangular lattice of which lattice constant ›2 is greater than the ›1 of the inner holes and equal to or larger than 3.0 µm and to form equal to or greater than two layers.