Abstract: A high performance dispersion compensating optical fiber is provided. In one embodiment, the optical fiber includes a core layer and a cladding layer surrounding the core layer. The core layer includes five core sublayers wherein the ?% of the first core sublayer is positive, and the ?% of at least one of the other core sublayers is negative, the radius ranges of the respective core sublayers beginning outwardly from the first core sublayer are 0.6 to 0.8 ?m, 1.0 to 1.2 ?m, 1.6 to 2.0 ?m, 5.0 to 6.0 ?m, and 7.0 to 8.0 ?m, respectively; the ranges of ?% of the respective sublayers beginning outwardly from the first core sublayer are about 1.8 to 2.1%, 1.2 to 1.4%, 0.6 to 1%, ?0.4 to ?0.6% and 0.2 to 0.4%, and the cladding layer is a pure Silicon Dioxide glass layer.

Abstract: A high performance dispersion compensating optical fiber is provided. In one embodiment, the optical fiber includes a core layer and a cladding layer surrounding the core layer. The core layer includes five core sublayers wherein the ?% of the first core sublayer is positive, and the ?% of at least one of the other core sublayers is negative, the radius ranges of the respective core sublayers beginning outwardly from the first core sublayer are 0.6 to 0.8 ?m, 1.0 to 1.2 ?m, 1.6 to 2.0 ?m, 5.0 to 6.0 ?m, and 7.0 to 8.0 ?m, respectively; the ranges of ?% of the respective sublayers beginning outwardly from the first core sublayer are about 1.8 to 2.1%, 1.2 to 1.4%, 0.6 to 1%, ?0.4 to ?0.6% and 0.2 to 0.4%, and the cladding layer is a pure Silicon Dioxide glass layer.

Abstract: The present invention directs to a method of manufacturing low water peak single mode optical fiber, which comprises performing deposition in a substrate tube using PCVD technology, whereby a deposited layer of a certain construction design is formed on the inner wall of the substrate tube, melt contracting the substrate tube into a solid core rod according to melt contraction technology, producing an optical fiber preform by combining the core rod and a jacket tube of low hydroxyl content by means of RIT technology or by depositing an outer cladding on the outer surface of the core rod using OVD technology, sending the optical fiber preform into a fiber drawing furnace to draw it into an optical fiber, wherein: in the PCVD technology, the content of impurities in a gas mixture of raw materials, which is characterized by the infrared spectrum transmissivity thereof, is required to a transmissivity of 90% or greater, the water content in O2 is 100 ppb or less, the water content in C2F6 is 1000 ppb or less, the

Abstract: The invention relates to a low dispersion slope dispersion-shifted single-mode fiber for large capacity transmission comprising a core and a cladding. Said fiber is characterized in that said core has three to five core segments having different refractive index profiles, and said cladding has four to six cladding segments. The total dispersion slope of said fiber at 1550 nm is less than 0.060 ps/nm2·km, the zero dispersion wavelength is less than 1420 nm, the effective area ranges from 55 &mgr;m2 to 65 &mgr;m2, and the dispersion in the region of 1530 nm˜1565 nm ranges from 5.0 ps/nm2·km to 12.0 ps/nm2·km. The fiber has low dispersion slope, moderate dispersion, low attenuation, and excellent bend resistance performance. It is suitable for a high-speed (10 Gbits/s and 40 Gbits/s), large capacity, and long distance DWDM system.