Optical fiber for metro network
AssigneeSamsung Electronics Co., Ltd.
InventorsYun-Geun Jang, Sung-Koog Oh, Ju-Chang Han
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Abstract
An optical fiber for an optical network is disclosed. The optical fiber includes a core having a core region having a first refractive index N1, and a refractive index depressed region surrounding the core region and having a second refractive index N2 that is lower than the first refractive index. A clad surrounds the core and having a third refractive index N4. The optical fiber has a zero-dispersion wavelength that is not less than 1555 nm and positioned in a wavelength range which does not exceed L-band. The optical fiber has negative dispersion values in C-band and positive dispersion values in L-band.
Claims18
An optical fiber comprising:
- a core having a core region having a first refractive index, and a refractive index depressed region surrounding the core region and having a second refractive index that is lower than the first refractive index;
- and
- a clad surrounding the core and having a third refractive index, wherein the optical fiber has a zero-dispersion wavelength that is not less than 1555 nm and positioned in a wavelength range that does not exceed L-band, and the optical fiber has only negative dispersion values in a wavelength range of from 1530 nm to the zero-dispersion wavelength and only positive dispersion values in a wavelength range of from the zero-dispersion wavelength to 1625 nm.
A metro network comprising:
- at least two nodes;
- at least one optical fiber connecting the nodes;
- and a plurality of erbium doped fiber amplifiers connected between the at least two nodes, wherein the at least one optical fiber includes a core having a core region having a first refractive index, and a refractive index depressed region surrounding the core region and having a second refractive index that is lower than the first refractive index, and a clad surrounding the core and having a third refractive index, wherein the optical fiber has a zero-dispersion wavelength that is not less than 1555 nm and positioned in a wavelength range that does not exceed L-band, and the optical fiber has negative dispersion values in C-band and positive dispersion values in L-band.
A method for configuring a metro optical network including at least one optical fiber, the method comprising the steps of:
- applying a direct modulation mode in a C-band where the optical fiber has negative dispersion values;
- and applying an external modulation mode in L-band where the optical fiber has positive dispersion values.
Dependencies are inferred from the claim text.