A fiber manufacturing intermediate product and method of producing photonic crystal fibers

Abstract

A method of manufacturing an optical fiber and a fiber manufacturing intermediate product. The fiber manufacturing intermediate product includes: an outer jacket; and a plurality of capillaries, wherein the capillaries include an intermediate level capillary diameter ratio of capillary inner diameter to outer capillary diameter greater than 0.90 and wherein a nominal wall thickness of each of the capillaries at the intermediate-level is greater than 1500 nm. This intermediate product may be drawn to a fiber where the wall thickness in each of the capillaries in the drawn fiber is less than 200 nm.

Dependencies are inferred from the claim text.