Korea Telecom

Jeong U Jeon

Young Tark Lee

Han Kyo Seo

Ki Tae Jeong

Seok Bong Ko

Tae Sang Park

The invention relates to a dispersion flattened fiber (DFF) with high negative dispersion and a manufacturing method thereof. The dispersion flattened fiber comprises a central core; ring-type cores and low refractive regions alternately formed outside the central core; a cladding surrounding outside the ring-type cores and low refractive regions; and a coating outside the cladding. Since the dispersion flattened fiber has the dispersion of &minus;20 to &minus;60, it has a wide range of application and can be used for various purposes in the field of optical telecommunication.

Dispersion flattened fiber with high negative dispersion and method for the manufacture thereof

A method for manufacturing a fiber package for use in an optical communication device, is comprised the steps of: preparing a ribbon-type fiber stack having a pair of sheared sides, the ribbon-type fiber stack being provided with a plurality of fragmental optical fibers, each of fragmental optical fibers including a core surrounded by a cladding; partially peeling the claddings from the fragmental optical fibers to expose the cores; forming gratings into the exposed cores; and installing a pair of side connections on the pair of sheared sides in the ribbon-type fiber stack, thereby forming a fiber package. In the invention method, the ribbon-type fiber stack and a pair of side connections are utilized, which can remove a need for the step of packing the optical fiber(s), simplifying the formation of the fiber stack.

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Daejeon, South Korea

Jeong U Jeon